641 community and non-transient non-community water systems are listed for South Carolina in EPA SDWIS. 165 were sampled under UCMR 5; 91 of those had at least one PFAS result at or above the reporting level, and 70 had a highest single result at or above a 2024 EPA limit (PFOA or PFOS 4 ppt, or Hazard Index 1).
South Carolina map · Download: systems (CSV) · all results (CSV, gzip)
These are monitoring results collected under EPA's Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) at entry points, where treated water enters the distribution system; they are not tap-water samples. They are not compliance determinations: compliance with EPA's 2024 PFAS limits is judged on running annual averages of compliance monitoring, required from 2029, so a single UCMR 5 result at or above a limit is not a violation. “< MRL” means the compound was not quantified at EPA's minimum reporting level; it does not mean zero.
Sampled under UCMR 5 (165)
| System | PWSID | City | Population | Highest PFOA (ppt) | Highest PFOS (ppt) | Highest HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Abbeville City Of (Sc0110001) | SC0110001 | Abbeville | 5,650 | <MRL | <MRL | 17.004 | Hazard Index ≥ 3 × its limit |
| Aiken City Of (Sc0210001) | SC0210001 | Aiken | 51,533 | <MRL | <MRL | 0.32 | Hazard Index below its limit |
| Allendale Town Of (Sc0310001) | SC0310001 | Allendale | 3,882 | <MRL | <MRL | 0 | No PFAS detected |
| Alligator Rural Water | SC1320004 | Mcbee | 4,743 | <MRL | <MRL | 0 | No PFAS detected |
| Amicks Ferry Wtr System (Sc3250077) | SC3250077 | Chapin | 3,937 | 4.6 | 7.6 | 0.72 | PFOS 1–3 × its limit |
| Andrews Town Of (Sc2210003) | SC2210003 | Andrews | 3,450 | <MRL | <MRL | 0 | No PFAS detected |
| Bamberg Public Works (Sc0510001) | SC0510001 | Bamberg | 3,735 | <MRL | <MRL | 0 | No PFAS detected |
| Barnwell Town Of (Sc0610001) | SC0610001 | Barnwell | 4,693 | <MRL | <MRL | 0 | No PFAS detected |
| Batesburg Leesville Dpw (Sc3210002) | SC3210002 | Batesburg-Leesville | 6,814 | 11.5 | 15 | 0 | PFOS ≥ 3 × its limit |
| Bcwsa East Cooper (Sc0820009) | SC0820009 | Moncks Corner | 12,933 | 5.9 | 7.1 | 0.742 | PFOS 1–3 × its limit |
| Bcwsa Sangaree W/D (0820002) | SC0820002 | Moncks Corner | 95,345 | 6.1 | 7.1 | 0.002 | PFOS 1–3 × its limit |
| Beech Island W/D (Sc0220004) | SC0220004 | Beech Island | 8,935 | <MRL | <MRL | 0 | No PFAS detected |
| Belton City Of (Sc0410004) | SC0410004 | Belton | 6,762 | 4.8 | <MRL | 8.292 | Hazard Index ≥ 3 × its limit |
| Bennettsville City Of (Sc3410001) | SC3410001 | Bennettsville | 9,168 | <MRL | <MRL | 0 | No PFAS detected |
| Bethlehem-Roanoke W/D (Sc3920003) | SC3920003 | Pickens | 6,334 | <MRL | <MRL | 0 | No PFAS detected |
| Bgwc I-20 (Sc3250012) | SC3250012 | Columbia | 7,435 | 5.7 | 8.3 | 0.952 | PFOS 1–3 × its limit |
| Big Creek W/S District (0420009) | SC0420009 | Belton | 13,647 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bishopville Town Of (Sc3110001) | SC3110001 | Bishopville | 3,810 | <MRL | <MRL | 0 | No PFAS detected |
| Bjw&Sa (Sc0720003) | SC0720003 | Okatie | 164,829 | 5.6 | 5.3 | 0.003 | PFOA 1–3 × its limit |
| Blacksburg Town Of (Sc1110002) | SC1110002 | Blacksburg | 3,963 | 12.4 | 13 | 0.41 | PFOS ≥ 3 × its limit |
| Blue Ridge Water Co Inc (Sc2320003) | SC2320003 | Greer | 40,006 | <MRL | <MRL | 0 | No PFAS detected |
| Branchville Town Of (3810005) | SC3810005 | Branchville | 1,218 | <MRL | <MRL | 0 | No PFAS detected |
| Breezy Hill W/D (Sc0220006) | SC0220006 | Graniteville | 21,197 | 4.8 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Broad Creek Psd (Sc0720009) | SC0720009 | Hilton Head Island | 3,481 | <MRL | <MRL | 0 | No PFAS detected |
| Broadway W&S District (Sc0420008) | SC0420008 | Anderson | 9,586 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Bucksport Water Company (Sc2620003) | SC2620003 | Conway | 17,123 | <MRL | <MRL | 0 | No PFAS detected |
| Camden City Of (Sc2810001) | SC2810001 | Camden | 19,076 | 5.2 | 4.7 | 0 | PFOA 1–3 × its limit |
| Cassatt Wtr - Kershaw/Lee Co Rwa | SC2820005 | Cassatt | 25,485 | <MRL | <MRL | 0 | No PFAS detected |
| Cayce City Of (Sc3210003) | SC3210003 | West Columbia | 17,460 | 5.5 | 6.3 | 1.162 | PFOS 1–3 × its limit |
| Central Town Of (Sc3910005) | SC3910005 | Central | 3,495 | 4.2 | 4.2 | 0.002 | PFOA 1–3 × its limit |
| Charleston Water System (Sc1010001) | SC1010001 | Charleston | 278,771 | 4.7 | 6.5 | 0.002 | PFOS 1–3 × its limit |
| Cheraw Town Of (Sc1310001) | SC1310001 | Cheraw | 6,325 | <MRL | 5.3 | 0 | PFOS 1–3 × its limit |
| Chester Metropolitan District (1220002) | SC1220002 | Chester | 15,668 | 4.6 | 4.7 | 0 | PFOS 1–3 × its limit |
| Chesterfield Co Rural Water (Sc1320003) | SC1320003 | Chesterfield | 25,691 | <MRL | <MRL | 0 | No PFAS detected |
| Clemson City Of (Sc3910004) | SC3910004 | Clemson | 17,896 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Clemson University (Sc3910006) | SC3910006 | Clemson | 8,320 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Clinton City Of (Sc3010002) | SC3010002 | Clinton | 8,938 | 8 | 8.1 | 1.435 | PFOS 1–3 × its limit |
| Clover Town Of | SC4610006 | Clover | 8,400 | <MRL | <MRL | 0 | No PFAS detected |
| Columbia City Of (Sc4010001) | SC4010001 | Columbia | 354,068 | 6.9 | 8.6 | 0.92 | PFOS 1–3 × its limit |
| Conway City Of (Sc2610008) | SC2610008 | Conway | 27,005 | 9.2 | 10.3 | 0.003 | PFOS 1–3 × its limit |
| Conway Rural (Sc2620001) | SC2620001 | Conway | 12,740 | 10.9 | 10.8 | 0.002 | PFOA 1–3 × its limit |
| Dacusville-Cedar Rock Wt Co (Sc3920008) | SC3920008 | Pickens | 8,700 | <MRL | <MRL | 0 | No PFAS detected |
| Dalzell Water District (Sc4320001) | SC4320001 | Sumter | 3,912 | <MRL | <MRL | 0 | No PFAS detected |
| Daniel Morgan Water District (1120001) | SC1120001 | Chesnee | 5,746 | 4.1 | 5 | 0 | PFOS 1–3 × its limit |
| Darlington City Of (Sc1610001) | SC1610001 | Darlington | 7,142 | <MRL | <MRL | 0 | No PFAS detected |
| Darlington County W&Sa (Sc1620001) | SC1620001 | Darlington | 52,288 | <MRL | <MRL | 0 | No PFAS detected |
| Dcwa Calomet Valley (1850009) | SC1850009 | Summerville | 275 | 5.2 | 6.7 | 0.622 | PFOS 1–3 × its limit |
| Dcwa Knightsville (Sc1820001) | SC1820001 | Summerville | 40,141 | 6.5 | 8.1 | 0.002 | PFOS 1–3 × its limit |
| Dcws Ashley Phosphate (Sc1820008) | SC1820008 | Summerville | 26,536 | 6.4 | 7.4 | 0.002 | PFOS 1–3 × its limit |
| Denmark City Of (Sc0510002) | SC0510002 | Denmark | 3,500 | <MRL | <MRL | 0 | No PFAS detected |
| Dillon City Of (Sc1710001) | SC1710001 | Dillon | 6,998 | <MRL | <MRL | 0 | No PFAS detected |
| Donalds-Due West W&Sa (Sc0120001) | SC0120001 | Donalds | 5,200 | <MRL | <MRL | 4 | Hazard Index ≥ 3 × its limit |
| Draytonville Water Dist (Sc1120003) | SC1120003 | Gaffney | 5,456 | 16.2 | 19.4 | 0.552 | PFOS ≥ 3 × its limit |
| Easley Combined Util (Sc3910002) | SC3910002 | Easley | 36,098 | <MRL | <MRL | 0 | No PFAS detected |
| Edgefield Co W&Sa (1920001) | SC1920001 | Edgefield | 29,200 | <MRL | <MRL | 0 | No PFAS detected |
| Edisto Beach Town Of (Sc1510006) | SC1510006 | Edisto Island | 5,848 | <MRL | <MRL | 0 | No PFAS detected |
| Electric City Utilities (Sc0410012) | SC0410012 | Anderson | 38,204 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Florence City Of (Sc2110001) | SC2110001 | Florence | 79,745 | 5.5 | 6.7 | 0.002 | PFOS 1–3 × its limit |
| Folly Beach City Of (1010005) | SC1010005 | Folly Beach | 5,086 | 5 | 8.1 | 0.002 | PFOS 1–3 × its limit |
| Fort Jackson (Sc4010501) | SC4010501 | Fort Jackson | 31,000 | 6.9 | 7.3 | 0.812 | PFOS 1–3 × its limit |
| Fort Mill Town Of (Sc4610003) | SC4610003 | Fort Mill | 25,000 | <MRL | <MRL | 0 | Other PFAS detected |
| Fripp Island Psd (Sc0720002) | SC0720002 | Fripp Island | 3,536 | 4.4 | 5.4 | 0.002 | PFOS 1–3 × its limit |
| Gaffney Bpw (Sc1110001) | SC1110001 | Gaffney | 24,290 | 18 | 17.1 | 0.602 | PFOA ≥ 3 × its limit |
| Gaston Rural Water Dist (Sc3220002) | SC3220002 | Gaston | 7,550 | <MRL | <MRL | 0 | No PFAS detected |
| Gcwsd Kilsock Water Sys (Sc2220002) | SC2220002 | Pawleys Island | 4,417 | <MRL | <MRL | 0 | No PFAS detected |
| Gcwsd Waccamaw Neck (Sc2220010) | SC2220010 | Pawleys Island | 41,300 | 9.5 | 9.1 | 0.003 | PFOA 1–3 × its limit |
| Georgetown City Of (Sc2210001) | SC2210001 | Georgetown | 9,092 | 8.3 | 9.7 | 0.002 | PFOS 1–3 × its limit |
| Georgetown Rural Comm Wa (2220001) | SC2220001 | Georgetown | 4,941 | <MRL | <MRL | 0 | No PFAS detected |
| Gilbert-Summit Wd (3220001) | SC3220001 | Gilbert | 10,400 | <MRL | <MRL | 0 | No PFAS detected |
| Goose Creek City Of (Sc0810004) | SC0810004 | Goose Creek | 43,744 | 5.8 | 7.2 | 0.682 | PFOS 1–3 × its limit |
| Goucher Wd (1120004) | SC1120004 | Pacolet | 5,426 | 14 | 17 | 0.47 | PFOS ≥ 3 × its limit |
| Grand Strand W&Sa/Bull Creek | SC2620004 | Conway | 252,840 | 11.4 | 11.5 | 0.003 | PFOS 1–3 × its limit |
| Grassy Pond Water Co Inc (Sc1120002) | SC1120002 | Gaffney | 9,895 | 15 | 19 | 0.572 | PFOS ≥ 3 × its limit |
| Greenville Water (Sc2310001) | SC2310001 | Greenville | 426,057 | <MRL | <MRL | 0 | No PFAS detected |
| Greenwood Cpw (2410001) | SC2410001 | Greenwood | 52,022 | 5.9 | 8.7 | 9.112 | Hazard Index ≥ 3 × its limit |
| Greer Cpw | SC2310005 | Greer | 54,024 | <MRL | <MRL | 0 | No PFAS detected |
| Gsw&Sa-Marion City Of (Sc3310001) | SC3310001 | Conway | 9,104 | <MRL | <MRL | 0 | No PFAS detected |
| Hammond W/D (Sc0420007) | SC0420007 | Belton | 21,193 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Hartsville City Of (Sc1610003) | SC1610003 | Hartsville | 8,711 | <MRL | <MRL | 0 | No PFAS detected |
| Hemingway Town Of (Sc4510004) | SC4510004 | Hemingway | 3,191 | <MRL | <MRL | 0 | No PFAS detected |
| High Hills | SC4320003 | Dalzell | 12,545 | <MRL | <MRL | 0 | No PFAS detected |
| Hilton Head Psd 1 (0720006) | SC0720006 | Hilton Head Island | 25,558 | 5.1 | 5.2 | 0.002 | PFOS 1–3 × its limit |
| Homeland Park W/D (Sc0420001) | SC0420001 | Anderson | 7,328 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Honea Path Town Of (Sc0410003) | SC0410003 | Honea Path | 4,386 | <MRL | <MRL | 4.2 | Hazard Index ≥ 3 × its limit |
| Inman Campobello W/D (4220002) | SC4220002 | Inman | 41,007 | <MRL | <MRL | 0 | No PFAS detected |
| Isle Of Palms W/S Comm (Sc1010004) | SC1010004 | Isle Of Palms | 9,530 | 5.7 | 8 | 0.002 | PFOS 1–3 × its limit |
| Jackson Town Of (Sc0210002) | SC0210002 | Jackson | 3,824 | <MRL | <MRL | 0 | No PFAS detected |
| Johnsonville City Of (Sc2110011) | SC2110011 | Johnsonville | 5,083 | <MRL | <MRL | 0 | No PFAS detected |
| Joint Muni Wsc (Sc3220003) | SC3220003 | Swansea | 54,868 | 4.4 | 6.2 | 1.01 | PFOS 1–3 × its limit |
| Keowee Key Utility System Inc (3750023) | SC3750023 | Salem | 4,108 | <MRL | <MRL | 0 | No PFAS detected |
| Kiawah Island Utility (Sc1010008) | SC1010008 | Kiawah Island | 9,550 | 4.5 | 7.9 | 0.002 | PFOS 1–3 × its limit |
| Kingstree Town Of (Sc4510002) | SC4510002 | Kingstree | 6,009 | <MRL | <MRL | 0 | No PFAS detected |
| Lake City City Of (Sc2110007) | SC2110007 | Lake City | 9,191 | <MRL | <MRL | 0 | No PFAS detected |
| Lake View Town Of (Sc1710003) | SC1710003 | Conway | 1,293 | <MRL | <MRL | 0 | No PFAS detected |
| Lakewood Campground (Sc2660049) | SC2660049 | Myrtle Beach | 4,415 | <MRL | <MRL | 0 | No PFAS detected |
| Lamar Town Of (Sc1610004) | SC1610004 | Lamar | 1,034 | <MRL | <MRL | 0 | No PFAS detected |
| Lancaster City Of (Sc2910001) | SC2910001 | Lancaster | 14,074 | 4 | <MRL | 0 | PFOA 1–3 × its limit |
| Lancaster County W&Sd (Sc2920001) | SC2920001 | Lancaster | 79,107 | <MRL | <MRL | 0 | Other PFAS detected |
| Laurens County W&S Comm (Sc3020001) | SC3020001 | Laurens | 44,866 | 7.5 | 8.7 | 9.582 | Hazard Index ≥ 3 × its limit |
| Laurens Cpw (Sc3010001) | SC3010001 | Laurens | 13,902 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Lcf Water District (Sc4220010) | SC4220010 | Chesnee | 18,152 | <MRL | <MRL | 0 | No PFAS detected |
| Lexington Town Of (3210001) | SC3210001 | Lexington | 24,284 | 4.4 | 5.7 | 0.91 | PFOS 1–3 × its limit |
| Liberty City Of (Sc3910003) | SC3910003 | Liberty | 3,594 | <MRL | <MRL | 0 | No PFAS detected |
| Loris City Of (Sc2610010) | SC2610010 | Loris | 4,350 | <MRL | <MRL | 0 | No PFAS detected |
| Lugoff Elgin Water Auth (Sc2820001) | SC2820001 | Lugoff | 25,783 | 7.1 | 9.3 | 0 | PFOS 1–3 × its limit |
| Manning City Of (Sc1410002) | SC1410002 | Manning | 7,632 | <MRL | <MRL | 0 | No PFAS detected |
| Marco Rural Water Co (Sc3320001) | SC3320001 | Marion | 17,120 | <MRL | <MRL | 0 | No PFAS detected |
| Marlboro Water Co (Sc3420001) | SC3420001 | Bennettsville | 5,360 | <MRL | <MRL | 0 | No PFAS detected |
| Mccormick Co W&Sa (Sc3520002) | SC3520002 | Mccormick | 8,500 | <MRL | 8.8 | 0.662 | PFOS 1–3 × its limit |
| Meansville Riley W/D (Sc4420001) | SC4420001 | Union | 7,368 | 5.2 | 4.9 | 0 | PFOA 1–3 × its limit |
| Metro Subdistrict B (Sc4220003) | SC4220003 | Spartanburg | 1,851 | <MRL | <MRL | 0 | No PFAS detected |
| Midcounty Water Dist 2 (Sc2020004) | SC2020004 | Winnsboro | 3,500 | <MRL | 20.1 | 0.65 | PFOS ≥ 3 × its limit |
| Moncks Corner City Of | SC0810001 | Moncks Corner | 8,956 | 5.8 | 8 | 0.722 | PFOS 1–3 × its limit |
| Montmorenci W/D (Sc0220008) | SC0220008 | Aiken | 4,006 | <MRL | <MRL | 0 | No PFAS detected |
| Mt Pleasant Waterworks (Sc1010002) | SC1010002 | Mount Pleasant | 91,500 | 5.5 | 8.4 | 0.002 | PFOS 1–3 × its limit |
| Mullins City Of (Sc3310002) | SC3310002 | Conway | 7,366 | <MRL | <MRL | 0 | No PFAS detected |
| Myrtle Beach City Of | SC2610001 | Myrtle Beach | 49,375 | 5.3 | 5.3 | 0.34 | PFOA 1–3 × its limit |
| N Myrtle Beach City Of (Sc2610011) | SC2610011 | N Myrtle Beach | 43,883 | 8.4 | 10 | 0.002 | PFOS 1–3 × its limit |
| New Ellenton Cpw (Sc0210007) | SC0210007 | New Ellenton | 7,517 | <MRL | <MRL | 0 | No PFAS detected |
| Newberry City Of (Sc3610001) | SC3610001 | Silverstreet | 10,810 | 6.3 | 11.3 | 1.022 | PFOS 1–3 × its limit |
| Newberry Co W&Sa (Sc3620002) | SC3620002 | Newberry | 11,157 | 4.8 | 8.1 | 0.97 | PFOS 1–3 × its limit |
| North Augusta City Of (Sc0210003) | SC0210003 | North Augusta | 26,125 | <MRL | <MRL | 0 | No PFAS detected |
| Ocean Lakes Ltd (Sc2660048) | SC2660048 | Myrtle Beach | 10,727 | 5 | 4.6 | 0 | PFOA 1–3 × its limit |
| Orangeburg Dpu (Sc3810001) | SC3810001 | Orangeburg | 47,463 | <MRL | 4.2 | 0 | PFOS 1–3 × its limit |
| Pendleton Town Of (Sc0410006) | SC0410006 | Pendleton | 5,597 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Pickens Water Treatment Plant Sc3910001 | SC3910001 | Pickens | 10,263 | <MRL | <MRL | 0 | No PFAS detected |
| Pioneer Rural Water Dist (Sc3720001) | SC3720001 | Westminster | 16,929 | <MRL | <MRL | 0 | No PFAS detected |
| Powdersville Water District (Sc0420002) | SC0420002 | Powdersville | 34,960 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Rock Hill City Of (Sc4610002) | SC4610002 | Rock Hill | 89,850 | <MRL | <MRL | 0 | Other PFAS detected |
| Saluda Co W&S Authority (Sc4120001) | SC4120001 | Ridge Spring | 5,060 | 5.2 | 9.7 | 0.8 | PFOS 1–3 × its limit |
| Saluda Cpw (Sc4110001) | SC4110001 | Saluda | 3,390 | 6.5 | 9.9 | 4.302 | Hazard Index ≥ 3 × its limit |
| Sandy Springs Water Co Inc (Sc0420003) | SC0420003 | Sandy Springs | 17,311 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Seabrook Island Town Of (1010009) | SC1010009 | Johns Island | 5,939 | 5 | 7.5 | 0.002 | PFOS 1–3 × its limit |
| Seneca City Of (Sc3710002) | SC3710002 | Seneca | 39,772 | <MRL | <MRL | 0 | No PFAS detected |
| Shaw Afb (Sc4310501) | SC4310501 | Shaw Afb | 9,000 | 6.1 | 6.2 | 1.9 | Hazard Index 1–3 × its limit |
| Silver Lake Mhp (Sc3260022) | SC3260022 | Stockbridge | 122 | <MRL | <MRL | 0 | No PFAS detected |
| Six Mile W/D (Sc3920002) | SC3920002 | Six Mile | 14,845 | <MRL | <MRL | 0 | No PFAS detected |
| Sjwd Middle Tyger Wtp (Sc4220006) | SC4220006 | Lyman | 89,531 | <MRL | <MRL | 0 | No PFAS detected |
| South Island Psd (Sc0720001) | SC0720001 | Hilton Head Island | 18,299 | <MRL | <MRL | 0 | No PFAS detected |
| Southside W/D (3920010) | SC3920010 | Liberty | 9,568 | <MRL | <MRL | 0 | No PFAS detected |
| Spartanburg Water System (Sc4210001) | SC4210001 | Spartanburg | 166,364 | <MRL | <MRL | 0 | No PFAS detected |
| Srns Llc A-Area (Sc0230501) | SC0230501 | Aiken | 8,700 | <MRL | <MRL | 0 | No PFAS detected |
| St John'S Water (Sc1020002) | SC1020002 | Johns Island | 22,592 | 5.4 | 8.5 | 0.002 | PFOS 1–3 × its limit |
| Starr-Iva W/D (Sc0420005) | SC0420005 | Starr | 11,125 | 4.9 | 4 | 0.002 | PFOA 1–3 × its limit |
| Summerville Cpw (Sc1810003) | SC1810003 | Summerville | 81,750 | 6.2 | 8.1 | 0.002 | PFOS 1–3 × its limit |
| Sumter City Of (Sc4310001) | SC4310001 | Sumter | 53,070 | <MRL | <MRL | 0 | No PFAS detected |
| Sws-Landrum Wtp (Sc4210003) | SC4210003 | Spartanburg | 5,143 | <MRL | <MRL | 0 | No PFAS detected |
| Tega Cay City Of (Sc4610008) | SC4610008 | Tega Cay | 10,500 | <MRL | <MRL | 0 | Other PFAS detected |
| Trico Water Company (Sc1720001) | SC1720001 | Dillon | 17,963 | <MRL | <MRL | 0 | No PFAS detected |
| Union City Of (Sc4410001) | SC4410001 | Union | 13,076 | 5.9 | 6.1 | 0.002 | PFOS 1–3 × its limit |
| Valley Psa (Sc0220012) | SC0220012 | Gloverville | 7,752 | <MRL | <MRL | 0 | No PFAS detected |
| Walhalla City Of (Sc3710004) | SC3710004 | Walhalla | 16,010 | <MRL | <MRL | 0 | No PFAS detected |
| Walterboro City Of (1510004) | SC1510004 | Walterboro | 11,829 | <MRL | <MRL | 0 | No PFAS detected |
| Ware Shoals Town Of (Sc2410003) | SC2410003 | Ware Shoals | 3,174 | 5.7 | 8.4 | 2.2 | Hazard Index 1–3 × its limit |
| Wcwsa (Sc4510007) | SC4510007 | Kingstree | 8,636 | <MRL | <MRL | 0 | No PFAS detected |
| West Anderson W/D (0420006) | SC0420006 | Anderson | 17,430 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| West Columbia City Of (Sc3210004) | SC3210004 | West Columbia | 34,028 | 6.1 | 7.9 | 0.97 | PFOS 1–3 × its limit |
| West Pelzer Town Of (Sc0410009) | SC0410009 | Greenville | 0 | <MRL | <MRL | 0 | No PFAS detected |
| Westminster City Of (Sc3710003) | SC3710003 | Westminster | 9,588 | <MRL | <MRL | 0 | No PFAS detected |
| Williamston Town Of (Sc0410010) | SC0410010 | Williamston | 6,693 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Winnsboro Town Of (2010001) | SC2010001 | Winnsboro | 10,391 | <MRL | 32.8 | 0.9 | PFOS ≥ 3 × its limit |
| Woodruff Roebuck W/D (Sc4220007) | SC4220007 | Woodruff | 32,038 | 4.7 | <MRL | 0.002 | PFOA 1–3 × its limit |
| York City Of (Sc4610001) | SC4610001 | York | 11,137 | <MRL | <MRL | 0 | Other PFAS detected |
| York County East Wd (Sc4620002) | SC4620002 | York | 30,225 | <MRL | <MRL | 0 | Other PFAS detected |
| York County West Wd (Sc4620003) | SC4620003 | York | 18,273 | <MRL | <MRL | 0 | Other PFAS detected |
Not tested under UCMR 5 (476)
UCMR 5 required monitoring by systems serving 3,300 or more people and by a representative sample of smaller systems. The systems below have no UCMR 5 results in EPA's data. Not tested is not the same as not detected: the absence of results says nothing about PFAS in their water.
| System | PWSID | Type | City | Population | Counties |
|---|---|---|---|---|---|
| 611 Harmon Llc (Sc4060012) | SC4060012 | CWS | Columbia | 24 | Richland County |
| Adams Run Civic Center (Sc1070148) | SC1070148 | NTNCWS | Adams Run | 26 | Charleston County |
| Adnah Hills Mhp (Sc4660115) | SC4660115 | CWS | Brooklyn | 340 | York County |
| Aiken-Vale Svc C City Of (Sc0250009) | SC0250009 | CWS | Aiken | 145 | Aiken County |
| Allendale Industrial Park (Sc0320002) | SC0320002 | CWS | Allendale | 2,694 | Allendale County |
| Ami Kids-Georgetown (Sc2270906) | SC2270906 | NTNCWS | Columbia | 130 | Georgetown County |
| Amrize (Sc3830002) | SC3830002 | NTNCWS | Holly Hill | 210 | Orangeburg County |
| Anderson Regional Joint Ws (Sc0420011) | SC0420011 | CWS | Anderson | 25 | Anderson County |
| Andrew Jackson Academy (0570100) | SC0570100 | NTNCWS | Ehrhardt | 185 | Bamberg County |
| Archroma Us Inc (0330001) | SC0330001 | NTNCWS | Martin | 100 | Allendale County |
| Awendaw Town Of (Sc1010504) | SC1010504 | CWS | Awendaw | 713 | Berkeley County, Charleston County |
| Bald Rock Hoa (Sc2370908) | SC2370908 | NTNCWS | Cleveland | 34 | Greenville County |
| Barrineau Water System (Sc1420002) | SC1420002 | CWS | Lake City | 1,879 | Clarendon County, Williamsburg County |
| Basin Rock Mhp (Sc3260164) | SC3260164 | CWS | Garfield | 190 | Lexington County |
| Bath W&Sd (Sc0220003) | SC0220003 | CWS | Bath | 757 | Aiken County |
| Bay Capital Water Works (Sc4050031) | SC4050031 | CWS | Columbia | 647 | Richland County |
| Bay Ridge S/D (Sc3750027) | SC3750027 | CWS | Salem | 33 | Oconee County |
| Bcwsa Lake Moultrie Estates (0820004) | SC0820004 | CWS | Moncks Corner | 156 | Berkeley County |
| Bcwsa Mt Holly (Sc0874018) | SC0874018 | NTNCWS | Moncks Corner | 25 | Berkeley County |
| Bcwsa Sineath Mhp (0850018) | SC0850018 | CWS | Moncks Corner | 594 | Berkeley County |
| Beaufort Mhp (Sc0760016) | SC0760016 | CWS | Beaufort | 107 | Beaufort County |
| Bel Air Mhp (Sc4060009) | SC4060009 | CWS | Sumter | 34 | Richland County |
| Belton-Honea Path Wa (Sc0410011) | SC0410011 | CWS | Honea Path | 2,555 | Anderson County, Greenville County |
| Berkeley Electric Coop (1030028) | SC1030028 | NTNCWS | Moncks Corner | 32 | Charleston County |
| Bethesda Prsbytrn Child Dvlpmnt(4670120) | SC4670120 | NTNCWS | York | 60 | York County |
| Bethune Rural Water (Sc2820006) | SC2820006 | CWS | Bethune | 3,100 | Kershaw County |
| Bethune Town Of (Sc2810002) | SC2810002 | CWS | Bethune | 541 | Kershaw County |
| Bgwc Barney Rhett (Sc4650018) | SC4650018 | CWS | Columbia | 109 | York County |
| Bgwc Belle Mead Acres (Sc0450016) | SC0450016 | CWS | Columbia | 175 | Anderson County, Greenville County |
| Bgwc Bellemead S/D (3250031) | SC3250031 | CWS | Columbia | 462 | Lexington County |
| Bgwc Bridgewater (Sc0450033) | SC0450033 | CWS | Columbia | 270 | Anderson County, Spartanburg County |
| Bgwc Brown Borough (Sc4650061) | SC4650061 | CWS | Columbia | 228 | York County |
| Bgwc Brown Neal (Sc4650047) | SC4650047 | CWS | Columbia | 52 | York County |
| Bgwc Calhoun Acres (Sc0450014) | SC0450014 | CWS | Columbia | 199 | Anderson County |
| Bgwc Cameron Acres (Sc4650059) | SC4650059 | CWS | Columbia | 70 | York County |
| Bgwc Carowood (Sc4650035) | SC4650035 | CWS | Columbia | 212 | York County |
| Bgwc Carrollton Place S/D (Sc4650062) | SC4650062 | CWS | Columbia | 108 | York County |
| Bgwc Cedarwood (Sc3250047) | SC3250047 | CWS | Columbia | 300 | Lexington County |
| Bgwc Charleswood S/D (4050008) | SC4050008 | CWS | Columbia | 484 | Richland County |
| Bgwc Charwood S/D (3250035) | SC3250035 | CWS | Columbia | 711 | Lexington County |
| Bgwc Clearview (Sc0450026) | SC0450026 | CWS | Columbia | 158 | Anderson County |
| Bgwc Country Oaks (Sc4650020) | SC4650020 | CWS | Columbia | 359 | York County |
| Bgwc Creekwood (3250042) | SC3250042 | CWS | Columbia | 136 | Lexington County |
| Bgwc Dobbins Estate (Sc0450058) | SC0450058 | CWS | Columbia | 196 | Anderson County |
| Bgwc Dutchman Acres (Sc3250028) | SC3250028 | CWS | Fort Mill | 60 | Lexington County |
| Bgwc Dutchman Shores (Sc3250021) | SC3250021 | CWS | Columbia | 335 | Lexington County |
| Bgwc Edgebrook (0450004) | SC0450004 | CWS | Columbia | 48 | Anderson County, Greenville County |
| Bgwc Emma Terrace (Sc3250022) | SC3250022 | CWS | Columbia | 65 | Lexington County |
| Bgwc Estates At Hilton (Sc3250103) | SC3250103 | CWS | Columbia | 67 | Lexington County |
| Bgwc Falcon Ranches (Sc3250016) | SC3250016 | CWS | Columbia | 292 | Lexington County |
| Bgwc Farm Pond (Sc4650056) | SC4650056 | CWS | Columbia | 70 | York County |
| Bgwc Farrowwood Estates (Sc4050012) | SC4050012 | CWS | Columbia | 377 | Richland County |
| Bgwc Fieldcrest (Sc0450032) | SC0450032 | CWS | Columbia | 65 | Anderson County |
| Bgwc Fox Trail (Sc3250038) | SC3250038 | CWS | Columbia | 94 | Lexington County |
| Bgwc Foxwood (Sc4650008) | SC4650008 | CWS | Columbia | 575 | York County |
| Bgwc Glenn Village Ii (Sc3250058) | SC3250058 | CWS | Columbia | 1,430 | Lexington County |
| Bgwc Greenforest (Sc0450006) | SC0450006 | CWS | Columbia | 173 | Anderson County |
| Bgwc Harborside (Sc3270302) | SC3270302 | CWS | Columbia | 345 | Lexington County |
| Bgwc Harmon Hill Estates (Sc4050011) | SC4050011 | CWS | Columbia | 126 | Richland County |
| Bgwc Haynie Builders (Sc0450063) | SC0450063 | CWS | Columbia | 270 | Anderson County |
| Bgwc Heatherwood-Blue Ridge (Sc3250015) | SC3250015 | CWS | Columbia | 478 | Lexington County |
| Bgwc Hickory Hill (Sc4650025) | SC4650025 | CWS | Columbia | 95 | York County |
| Bgwc Hidden Lake (Sc0450072) | SC0450072 | CWS | Columbia | 245 | Anderson County |
| Bgwc Hidden Lakes (Sc4650040) | SC4650040 | CWS | Columbia | 121 | York County |
| Bgwc Hidden Valley (Sc3250073) | SC3250073 | CWS | Columbia | 526 | Lexington County |
| Bgwc Hill And Dale (Sc0450036) | SC0450036 | CWS | Columbia | 181 | Anderson County |
| Bgwc Hilton Place (Sc3250072) | SC3250072 | CWS | Columbia | 87 | Lexington County |
| Bgwc Hunters Glen S/D (0250005) | SC0250005 | CWS | Columbia | 97 | Aiken County |
| Bgwc Idlewood (Sc3250017) | SC3250017 | CWS | Columbia | 134 | Lexington County |
| Bgwc Indian Cove S/D (Sc3250020) | SC3250020 | CWS | Columbia | 92 | Lexington County |
| Bgwc Indian Fork-40 Love (3250066) | SC3250066 | CWS | Columbia | 615 | Lexington County, Richland County |
| Bgwc Indian Pines (Sc3250051) | SC3250051 | CWS | Columbia | 43 | Lexington County |
| Bgwc Kims Acres (Sc4650041) | SC4650041 | CWS | Columbia | 152 | York County |
| Bgwc Kingswood S/D (Sc2350011) | SC2350011 | CWS | Columbia | 77 | Greenville County |
| Bgwc Lake Village (Sc3250054) | SC3250054 | CWS | Columbia | 197 | Lexington County |
| Bgwc Lakewood (Sc0450065) | SC0450065 | CWS | Columbia | 183 | Anderson County, Greenville County |
| Bgwc Lakewood Estates (Sc3250005) | SC3250005 | CWS | Columbia | 737 | Lexington County, Newberry County |
| Bgwc Lands End Condos (Sc3270300) | SC3270300 | CWS | Columbia | 330 | Lexington County |
| Bgwc Lessliedale (Sc4660095) | SC4660095 | CWS | Columbia | 75 | York County |
| Bgwc Lessliewoods 2 (Sc4650051) | SC4650051 | CWS | Columbia | 41 | York County |
| Bgwc Lexington Estates (Sc3250050) | SC3250050 | CWS | Columbia | 434 | Lexington County |
| Bgwc Lexington Farms (Sc3250069) | SC3250069 | CWS | Columbia | 353 | Lexington County |
| Bgwc Mallard Cove (Sc3250076) | SC3250076 | CWS | Columbia | 78 | Lexington County |
| Bgwc Mallard Lakes (Sc4650057) | SC4650057 | CWS | Columbia | 137 | York County |
| Bgwc Middlestream (Sc4650052) | SC4650052 | CWS | Columbia | 88 | York County |
| Bgwc Milmont Shores (Sc3250025) | SC3250025 | CWS | Columbia | 57 | Lexington County |
| Bgwc Murray Lodge (3250013) | SC3250013 | CWS | Columbia | 165 | Lexington County |
| Bgwc Murray Park Estates (Sc3250019) | SC3250019 | CWS | Columbia | 125 | Lexington County |
| Bgwc Nevitt Forest (Sc0450007) | SC0450007 | CWS | Columbia | 571 | Anderson County |
| Bgwc Oakland Plantation (Sc4350006) | SC4350006 | CWS | Columbia | 1,180 | Sumter County |
| Bgwc Oakridge Hunt Club (Sc4050019) | SC4050019 | CWS | Columbia | 208 | Richland County |
| Bgwc Oakwood Estates (0450076) | SC0450076 | CWS | Columbia | 143 | Anderson County |
| Bgwc Old Farm (Sc4650042) | SC4650042 | CWS | Columbia | 52 | York County |
| Bgwc Olympic Acres (Sc4650053) | SC4650053 | CWS | Columbia | 209 | York County |
| Bgwc Parkwood S/D (3250029) | SC3250029 | CWS | Columbia | 311 | Lexington County |
| Bgwc Peachtree Acres (3250045) | SC3250045 | CWS | Columbia | 124 | Lexington County |
| Bgwc Pepperidge (Sc4660101) | SC4660101 | CWS | Columbia | 142 | York County |
| Bgwc Pocalla Development (Sc4350007) | SC4350007 | CWS | Columbia | 327 | Sumter County |
| Bgwc Pollys Circle (Sc4660073) | SC4660073 | CWS | Columbia | 114 | York County |
| Bgwc Purdy Shores (Sc0150014) | SC0150014 | CWS | Columbia | 266 | Abbeville County, Anderson County |
| Bgwc Raintree Acres (Sc4050015) | SC4050015 | CWS | Columbia | 828 | Richland County |
| Bgwc Ridgewood (Sc4650031) | SC4650031 | CWS | Columbia | 179 | York County |
| Bgwc Riverbend Estates (Sc4660103) | SC4660103 | CWS | Columbia | 93 | York County |
| Bgwc Rock Bluff S/D (4550001) | SC4550001 | CWS | Columbia | 45 | Williamsburg County |
| Bgwc Rollingwood (Sc3250052) | SC3250052 | CWS | Columbia | 498 | Lexington County |
| Bgwc Sangaree Mhp (Sc3260012) | SC3260012 | CWS | Columbia | 174 | Lexington County |
| Bgwc Shandon (Sc4650009) | SC4650009 | CWS | Columbia | 171 | York County |
| Bgwc Sherwood Forest (Sc0450029) | SC0450029 | CWS | Columbia | 97 | Anderson County |
| Bgwc Shiloh Quarters (Sc4660092) | SC4660092 | CWS | Columbia | 155 | York County |
| Bgwc Silver Lakes-Windwood (Sc4650034) | SC4650034 | CWS | Columbia | 191 | York County |
| Bgwc Southbend Estates (Sc4660100) | SC4660100 | CWS | Columbia | 111 | York County |
| Bgwc Springfield Acres (Sc4050006) | SC4050006 | CWS | Columbia | 119 | Richland County |
| Bgwc Springlake Estates (Sc4650012) | SC4650012 | CWS | Columbia | 36 | York County |
| Bgwc Stonegate (Sc4050014) | SC4050014 | CWS | Columbia | 352 | Richland County |
| Bgwc Surfside Heights (Sc0450066) | SC0450066 | CWS | Columbia | 61 | Anderson County |
| Bgwc Tanglewood S/D (Sc4150011) | SC4150011 | CWS | Columbia | 29 | Saluda County |
| Bgwc Tanya Terrace (Sc3250023) | SC3250023 | CWS | Columbia | 54 | Lexington County |
| Bgwc The Landings (3250063) | SC3250063 | CWS | Columbia | 434 | Lexington County |
| Bgwc Town Creek (Sc0450003) | SC0450003 | CWS | Columbia | 275 | Anderson County |
| Bgwc Trollingwood S/D (Sc2350010) | SC2350010 | CWS | Columbia | 180 | Greenville County |
| Bgwc Valleymere Mh (Sc4650046) | SC4650046 | CWS | Columbia | 59 | York County |
| Bgwc Washington Heights (Sc4050013) | SC4050013 | CWS | Columbia | 190 | Richland County |
| Bgwc Wesleywood (Sc4650016) | SC4650016 | CWS | Columbia | 65 | York County |
| Bgwc Westside Terrace (3250002) | SC3250002 | CWS | Columbia | 172 | Lexington County |
| Bgwc Windy Hill (Sc3250057) | SC3250057 | CWS | Columbia | 371 | Lexington County |
| Bgwc Windy Run (Sc4650048) | SC4650048 | CWS | Columbia | 90 | York County |
| Bgwc Wintercrest (Sc4650017) | SC4650017 | CWS | Columbia | 505 | York County |
| Bgwc Woodbridge (Sc4650028) | SC4650028 | CWS | Columbia | 173 | York County |
| Bgwc Woodmont Estate (Sc2350013) | SC2350013 | CWS | Columbia | 59 | Greenville County |
| Bjwsa Palm Key (Sc2750031) | SC2750031 | CWS | Okatie | 153 | Jasper County |
| Bjwsa Point South (Sc2750028) | SC2750028 | NTNCWS | Okatie | 250 | Jasper County |
| Blackville Town Of (Sc0610003) | SC0610003 | CWS | Blackville | 1,934 | Barnwell County |
| Bowman Town Of (Sc3810004) | SC3810004 | CWS | Bowman | 1,274 | Orangeburg County |
| Boys Farm Inc (Sc3670108) | SC3670108 | CWS | Newberry | 50 | Newberry County |
| Briarwood Mhp (Sc0760076) | SC0760076 | CWS | Lobeco | 44 | Beaufort County |
| Browns Creek W/D (Sc4420002) | SC4420002 | CWS | Union | 2,790 | Union County |
| Browns Ferry Water Co (Sc2220003) | SC2220003 | CWS | Georgetown | 2,550 | Georgetown County |
| Brunson Town Of (Sc2510004) | SC2510004 | CWS | Hampton | 649 | Hampton County |
| Bull Swamp Rural Water Co | SC3820001 | CWS | Orangeburg | 2,350 | Orangeburg County |
| Burbage Mhp (Sc1060063) | SC1060063 | CWS | Mount Pleasant | 171 | Charleston County |
| Burnettown W/D (Sc0220007) | SC0220007 | CWS | Bath | 1,090 | Aiken County |
| Butlers Mhp (Sc0860063) | SC0860063 | CWS | Moncks Corner | 77 | Berkeley County |
| Calhoun Falls Town Of (Sc0110002) | SC0110002 | CWS | Calhoun Falls | 2,473 | Abbeville County |
| Callawassie Island (Sc0750041) | SC0750041 | CWS | Kiawah Island | 900 | Beaufort County |
| Cameron Mhp (Sc0260038) | SC0260038 | CWS | Aiken | 83 | Aiken County |
| Camp Long Leadership Center (0270678) | SC0270678 | NTNCWS | Aiken | 175 | Aiken County |
| Cape Romain School (Sc1070140) | SC1070140 | NTNCWS | Mcclellanville | 198 | Charleston County |
| Carlisle Town Of (4410003) | SC4410003 | CWS | Carlisle | 555 | Union County |
| Carroll Mhp 1 (Sc4660087) | SC4660087 | CWS | York | 25 | York County |
| Carroll Mhp 2 (Sc4660088) | SC4660088 | CWS | York | 35 | York County |
| Catawba Baptist Cdc (Sc4670118) | SC4670118 | NTNCWS | Rock Hill | 90 | York County |
| Catawba Indian Nation Cws (Sc4650063) | SC4650063 | CWS | Rock Hill | 446 | York County |
| Catawba River Wsp (2920002) | SC2920002 | CWS | Van Wyck | 25 | Lancaster County, York County |
| Cedar Hill Mhp (Sc4360010) | SC4360010 | CWS | Sumter | 128 | Sumter County |
| Cedar Retirement Center (Sc3270010) | SC3270010 | CWS | Columbia | 45 | Lexington County |
| Cedar Valley Mhp (Sc4660009) | SC4660009 | CWS | Catawba | 290 | York County |
| Chasehunt Farms (Sc3250104) | SC3250104 | CWS | St Louis | 75 | Lexington County |
| Chemtrade (Sc1230006) | SC1230006 | NTNCWS | Carlisle | 27 | Chester County |
| Cherokee Creek Boys School (Sc3770002) | SC3770002 | CWS | Westminster | 40 | Oconee County |
| Chesterfield Town Of (1310002) | SC1310002 | CWS | Chesterfield | 1,670 | Chesterfield County |
| Chickasaw Point (Sc3750010) | SC3750010 | CWS | Westminster | 823 | Oconee County |
| Chucks Mhp (Sc4660077) | SC4660077 | CWS | Clover | 168 | York County |
| Clarendon Co W&S Hwy 260 (Sc1450013) | SC1450013 | CWS | Manning | 3,521 | Clarendon County |
| Claxton Hillview Manor (Sc0260016) | SC0260016 | CWS | Graniteville | 47 | Aiken County |
| Clearwater Ws Dist (Sc0220015) | SC0220015 | CWS | Clearwater | 529 | Aiken County |
| Cliffs At Glassy The (Sc2350023) | SC2350023 | CWS | Greer | 1,195 | Greenville County |
| Cliffs At Keowee (Sc3950009) | SC3950009 | CWS | West Union | 23 | Pickens County |
| Clio Town Of (Sc3410002) | SC3410002 | CWS | Clio | 788 | Marlboro County |
| Clover Sch Dist Bethany School (4670101) | SC4670101 | NTNCWS | Clover | 450 | York County |
| Cold Springs School (Sc0170104) | SC0170104 | NTNCWS | Abbeville | 41 | Abbeville County |
| College Acres Public W/D (Sc0220002) | SC0220002 | CWS | Aiken | 1,360 | Aiken County |
| College Place (Sc3970301) | SC3970301 | CWS | Seneca | 114 | Pickens County |
| Country Acres (Sc2450057) | SC2450057 | CWS | Greenwood | 34 | Greenwood County |
| Country Park (Sc3260187) | SC3260187 | CWS | Lexington | 36 | Lexington County |
| Country Village Mhp (Sc1360008) | SC1360008 | CWS | Cheraw | 96 | Chesterfield County |
| Coward Town Of (Sc2110012) | SC2110012 | CWS | Coward | 2,283 | Florence County |
| Crawford Edge (Sc3970303) | SC3970303 | CWS | Seneca | 552 | Pickens County |
| Crescent Mhp (Sc4360011) | SC4360011 | CWS | Sumter | 259 | Sumter County |
| Cresthaven Mhp (Sc4060001) | SC4060001 | CWS | Mount Pleasant | 37 | Richland County |
| Crystal Pines (Sc3250065) | SC3250065 | CWS | Chapin | 69 | Lexington County |
| Cypress Pointe Condos (Sc1470304) | SC1470304 | CWS | Manning | 154 | Clarendon County |
| Daufuskie Isl Util-Haig Point (0750036) | SC0750036 | CWS | Tequesta | 608 | Beaufort County |
| Daufuskie Isl Util-Melrose (Sc0750043) | SC0750043 | CWS | Tequesta | 263 | Beaufort County |
| Dcwa Tranquil Acres (Sc1820003) | SC1820003 | CWS | Summerville | 858 | Dorchester County |
| Dcws Building (1870903) | SC1870903 | NTNCWS | Summerville | 100 | Dorchester County |
| Dcws Caleb Court (Sc1850015) | SC1850015 | CWS | Summerville | 156 | Dorchester County |
| Dcws Conoflow (Sc1820007) | SC1820007 | CWS | Summerville | 150 | Dorchester County |
| Dcws Edisto Tribal Council (1850010) | SC1850010 | CWS | Summerville | 925 | Dorchester County |
| Dcws Highway 17A (Sc1820009) | SC1820009 | CWS | Summerville | 200 | Dorchester County |
| Dcws I-95 (Sc1870914) | SC1870914 | CWS | Summerville | 102 | Dorchester County, Orangeburg County |
| Dcws Southern Palms (Sc1850011) | SC1850011 | CWS | Summerville | 1,494 | Charleston County, Dorchester County |
| Dcws Woodland High School (1870119) | SC1870119 | NTNCWS | Summerville | 1,000 | Dorchester County |
| Dcws/Clay Field Drive (Sc1850014) | SC1850014 | CWS | Summerville | 1,648 | Dorchester County |
| Dcws/Reevesville | SC1820002 | CWS | Summerville | 300 | Colleton County, Dorchester County |
| Desci Vc Summer Nuclear Sta (Sc2030004) | SC2030004 | NTNCWS | Jenkinsville | 1,000 | Fairfield County |
| Desci Wateree Station (Sc4030001) | SC4030001 | NTNCWS | Cayce | 148 | Richland County |
| Devro-Teepak (Sc0930003) | SC0930003 | NTNCWS | Columbia | 185 | Calhoun County |
| Dewees Utilities (Sc1050011) | SC1050011 | CWS | Dewees Island | 55 | Charleston County |
| Diamond Hill School (Sc0170105) | SC0170105 | NTNCWS | Abbeville | 335 | Abbeville County |
| Dorchester Co Career School (Sc1870109) | SC1870109 | NTNCWS | Dorchester | 325 | Dorchester County |
| Dsm Nutritional Products Llc(4530001) | SC4530001 | NTNCWS | Kingstree | 240 | Williamsburg County |
| Duncan Mhp (Sc4660093) | SC4660093 | CWS | Rock Hill | 60 | York County |
| E Frierson School (Sc1070115) | SC1070115 | NTNCWS | North Charleston | 281 | Charleston County |
| Easley Central W/D #1 (Sc3920001) | SC3920001 | CWS | Norris | 3,283 | Pickens County |
| Easley Central W/D #2 (Sc3920007) | SC3920007 | CWS | Norris | 3,234 | Pickens County |
| Eastover Town Of (Sc4010002) | SC4010002 | CWS | Eastover | 700 | Richland County |
| Edgemoor Headstart (Sc1270103) | SC1270103 | NTNCWS | Rock Hill | 50 | Chester County |
| Edisto Exp Station (Sc0670900) | SC0670900 | NTNCWS | Blackville | 53 | Barnwell County |
| Ehrhardt Town Of (Sc0510003) | SC0510003 | CWS | Ehrhardt | 507 | Bamberg County |
| Elko Town Of (0610005) | SC0610005 | CWS | Elko | 340 | Barnwell County |
| Elloree Water System (Sc3810003) | SC3810003 | CWS | Elloree | 1,498 | Orangeburg County |
| Emerald Shores (Sc3250088) | SC3250088 | CWS | Prosperity | 36 | Lexington County |
| Estill Town Of (Sc2510002) | SC2510002 | CWS | Estill | 2,120 | Hampton County |
| Eutawville Town Of (Sc3810006) | SC3810006 | CWS | Eutwawville | 555 | Orangeburg County |
| Fairfax Town Of (Sc0310004) | SC0310004 | CWS | Fairfax | 1,962 | Allendale County |
| Faith Cathedral Fellowship Inc (1570924) | SC1570924 | CWS | Walterboro | 54 | Colleton County |
| Fern Forest Mhp (Sc4660001) | SC4660001 | CWS | Fort Mill | 99 | Lancaster County, York County |
| Fishing Creek Poa (Sc1550002) | SC1550002 | CWS | Edisto Island | 98 | Colleton County |
| Forest Estates Mhp (Sc4660112) | SC4660112 | CWS | Bellmont | 40 | York County |
| Foxwood Hills (Sc3750025) | SC3750025 | CWS | St Louis | 1,828 | Oconee County |
| Freeway Mhp (Sc4060005) | SC4060005 | CWS | Columbia | 135 | Richland County |
| Furman Town Of (Sc2510007) | SC2510007 | CWS | Furman | 238 | Hampton County |
| Garnett Mhp (Sc0860058) | SC0860058 | CWS | Moncks Corner | 41 | Berkeley County |
| Gauley Falls 2 4 5 6 (Sc3950008) | SC3950008 | CWS | Easley | 49 | Pickens County |
| Gauley Falls W/S (Sc3950004) | SC3950004 | CWS | Easley | 44 | Pickens County |
| Gcwsd Carvers Bay (Sc2220013) | SC2220013 | CWS | Pawleys Island | 3,133 | Georgetown County |
| Gcwsd Garden City Point (Sc2220011) | SC2220011 | CWS | Pawleys Island | 1,790 | Georgetown County, Horry County |
| Gcwsd Plantersville Sys (2220004) | SC2220004 | CWS | Pawleys Island | 1,079 | Georgetown County |
| Gcwsd Red Hill (2220007) | SC2220007 | CWS | Pawleys Island | 726 | Georgetown County |
| Gcwsd Wedgefield Plantation (2220006) | SC2220006 | CWS | Pawleys Island | 1,132 | Georgetown County |
| Georgia Pacific-Clarendon (Sc1430007) | SC1430007 | NTNCWS | Alcolu | 158 | Clarendon County |
| Gifford Town Of (Sc2510009) | SC2510009 | CWS | Hampton | 400 | Hampton County |
| Gin Pond Shores Water Co (Sc1450005) | SC1450005 | CWS | Summerton | 664 | Clarendon County |
| Glen At Clover Llc The (Sc4660064) | SC4660064 | CWS | Sandy | 300 | York County |
| Goods Mhp (Sc4660098) | SC4660098 | CWS | York | 128 | York County |
| Goodwill Headstart (Sc4370119) | SC4370119 | NTNCWS | Sumter | 150 | Sumter County |
| Granada Subdivision (Sc4350008) | SC4350008 | CWS | Sumter | 150 | Sumter County |
| Great Swamp Baptist Church (2770107) | SC2770107 | NTNCWS | Ridgeland | 200 | Jasper County |
| Greeleyville Town Of (Sc4510001) | SC4510001 | CWS | Greeleyville | 850 | Williamsburg County |
| Green Earth Pws (Sc4610009) | SC4610009 | CWS | Rock Hill | 280 | York County |
| Gsw&Sa-Nichols Town Of (3310003) | SC3310003 | CWS | Conway | 678 | Marion County |
| Gswsa - Myrtle Beach | SC2620009 | CWS | Conway | 25 | Horry County |
| Halter Acres Mhp (Sc3260090) | SC3260090 | CWS | Lexington | 90 | Lexington County |
| Hampton Co Industrial Site (Sc2570908) | SC2570908 | NTNCWS | Hampton | 90 | Hampton County |
| Hampton Town Of (Sc2510001) | SC2510001 | CWS | Hampton | 3,467 | Hampton County |
| Harbor Island (Sc0750013) | SC0750013 | CWS | Kiawah Island | 1,039 | Beaufort County |
| Harleyville Cement Plant (Sc1830005) | SC1830005 | NTNCWS | Harleyville | 105 | Dorchester County |
| Harleyville Elem School (Sc1870101) | SC1870101 | NTNCWS | Saint George | 275 | Dorchester County |
| Harleyville Town Of (Sc1810002) | SC1810002 | CWS | Harleyville | 946 | Dorchester County |
| Harts Cove And Tory Pointe (Sc3750029) | SC3750029 | CWS | Seneca | 560 | Oconee County |
| Heath Springs Town Of (Sc2910002) | SC2910002 | CWS | Heath Springs | 947 | Lancaster County |
| Henson Mhp (Sc4660111) | SC4660111 | CWS | Rock Hill | 65 | York County |
| Hermitage Mhp (Sc3260189) | SC3260189 | CWS | Charlotte | 100 | Lexington County |
| Heron'S Walk Phase 1 (Sc1850017) | SC1850017 | CWS | Summerville | 231 | Dorchester County |
| Hickory Grove Town Of (Sc4610004) | SC4610004 | CWS | Hickory Grove | 654 | York County |
| Hidden Acres Mhp (Sc3260207) | SC3260207 | CWS | Charlotte | 74 | Lexington County |
| Hidden Oaks Mhp (Sc3260140) | SC3260140 | CWS | North Port | 40 | Lexington County |
| Hideaway Mhp (Sc3260127) | SC3260127 | CWS | Lexington | 35 | Lexington County |
| Highlands At Gaston (Sc3270011) | SC3270011 | CWS | Gaston | 71 | Lexington County |
| Highway 88 W/D (Sc0420004) | SC0420004 | CWS | Sandy Springs | 3,990 | Anderson County |
| Hilda Town Of (Sc0610004) | SC0610004 | CWS | Hilda | 330 | Barnwell County |
| Hillview Mhp (Sc3260104) | SC3260104 | CWS | Lexington | 96 | Lexington County |
| Hilton Sound (Sc3250024) | SC3250024 | CWS | St Louis | 50 | Lexington County |
| Hm Grr - Harleyville (Sc1830024) | SC1830024 | NTNCWS | Harleyville | 25 | Dorchester County |
| Hm Southeast Cement Harleyville 1830001 | SC1830001 | NTNCWS | Harleyville | 180 | Dorchester County |
| Holly Hill Town Of (Sc3810002) | SC3810002 | CWS | Holly Hill | 1,710 | Orangeburg County |
| Homecoming Subdivision (Sc1850016) | SC1850016 | CWS | Summerville | 883 | Dorchester County |
| Hopkins Community Water System (4020002) | SC4020002 | CWS | Irmo | 2,200 | Richland County |
| House Of Raeford (Sc4530004) | SC4530004 | NTNCWS | Nesmith | 145 | Williamsburg County |
| Hyde Park S/D (Sc2450001) | SC2450001 | CWS | St Louis | 234 | Greenwood County |
| Inn At Middleton Place (Sc1870400) | SC1870400 | NTNCWS | Charleston | 85 | Dorchester County |
| Interfor (Sc2230002) | SC2230002 | NTNCWS | Georgetown | 88 | Georgetown County |
| Inv Camden Plant (Sc2830001) | SC2830001 | NTNCWS | Camden | 400 | Kershaw County |
| Isaqueena Point Util Sys (Sc3750008) | SC3750008 | CWS | Liberty | 38 | Oconee County |
| Iva Town Of (Sc0410001) | SC0410001 | CWS | Iva | 1,874 | Anderson County |
| J W Yonce 606 (Sc1971004) | SC1971004 | NTNCWS | Johnston | 85 | Saluda County |
| Jakes Landing (Sc3260048) | SC3260048 | CWS | Lexington | 79 | Lexington County |
| Jamestown Town Of (Sc0810003) | SC0810003 | CWS | Jamestown | 800 | Berkeley County |
| Jane Edwards Elementary (Sc1070122) | SC1070122 | NTNCWS | North Charleston | 100 | Charleston County |
| Jefferson Town Of (Sc1310005) | SC1310005 | CWS | Jefferson | 948 | Chesterfield County |
| Jenkinsville Water Company (Sc2020001) | SC2020001 | CWS | Jenkinsville | 2,550 | Fairfield County |
| Jericho Trailer Park (1060061) | SC1060061 | CWS | Ravenel | 103 | Charleston County |
| Jonesville Town Of (Sc4410002) | SC4410002 | CWS | Jonesville | 1,886 | Union County |
| Kemira Chemicals Inc (Sc4030013) | SC4030013 | NTNCWS | Eastover | 33 | Richland County |
| Keowee Bay S/D (Sc3750026) | SC3750026 | CWS | Salem | 86 | Oconee County |
| Kershaw Town Of (Sc2910003) | SC2910003 | CWS | Kershaw | 2,567 | Lancaster County |
| Kokomo Palms Mhp (Sc4360037) | SC4360037 | CWS | Mt Pleasant | 280 | Sumter County |
| Lake Lodge Apartments (Sc3270301) | SC3270301 | CWS | West Columbia | 130 | Lexington County |
| Lake Marion Regional Water Sys (3820003) | SC3820003 | CWS | Moncks Corner | 25 | Orangeburg County |
| Lake Moultrie Regional Ws (Sc0820008) | SC0820008 | CWS | Moncks Corner | 25 | Berkeley County |
| Lake Wylie Mhp (Sc4660081) | SC4660081 | CWS | Cary | 1,225 | York County |
| Lakeside Forest 2 (Sc3250030) | SC3250030 | CWS | St Louis | 43 | Lexington County |
| Lakeview Mhp (Sc0760001) | SC0760001 | CWS | Bluffton | 114 | Beaufort County |
| Lakewood Mhp (Sc4060032) | SC4060032 | CWS | Columbia | 110 | Richland County |
| Lambert Mhp (Sc4660108) | SC4660108 | CWS | Rock Hill | 50 | York County |
| Lands Point S/D (Sc4050004) | SC4050004 | CWS | St Louis | 64 | Richland County |
| Lane Town Of (4510005) | SC4510005 | CWS | Lane | 585 | Williamsburg County |
| Langley W/D (Sc0220001) | SC0220001 | CWS | Langley | 877 | Aiken County |
| Latta Town Of (Sc1710002) | SC1710002 | CWS | Latta | 2,076 | Dillon County |
| Laurens Proving Ground (Sc3030005) | SC3030005 | NTNCWS | Mountville | 48 | Laurens County |
| Lcca Head Start (Sc1570115) | SC1570115 | NTNCWS | Walterboro | 265 | Colleton County |
| Lcjmwsc-Pelion Town Of (Sc3210010) | SC3210010 | CWS | Swansea | 1,106 | Lexington County |
| Liberty Baptist Church (Sc4670106) | SC4670106 | NTNCWS | York | 65 | York County |
| Lieber Correctional Institute (1870050) | SC1870050 | CWS | Columbia | 1,646 | Berkeley County, Dorchester County |
| Lincolnville Town Of (Sc1010007) | SC1010007 | CWS | Lincolnville | 1,980 | Berkeley County, Charleston County |
| Little Bloomers Preschool (1570118) | SC1570118 | NTNCWS | Walterboro | 49 | Colleton County |
| Lockhart Town Of (Sc4420010) | SC4420010 | CWS | Lockhart | 496 | Union County |
| Lodge Town Of (Sc1510001) | SC1510001 | CWS | Lodge | 121 | Colleton County |
| Long Cane Mhp (Sc1960002) | SC1960002 | CWS | Aiken | 48 | Edgefield County |
| Lost Colony S/D (Sc4650019) | SC4650019 | CWS | Rock Hill | 54 | Chester County, York County |
| Lower Calhoun (Sc0920003) | SC0920003 | CWS | Gaston | 504 | Calhoun County, Orangeburg County |
| Lynchburg Town Of (Sc3110002) | SC3110002 | CWS | Lynchburg | 373 | Lee County |
| Macdougall Correctional Inst (Sc0870050) | SC0870050 | CWS | Columbia | 790 | Berkeley County |
| Manchester Farms (Sc4030801) | SC4030801 | NTNCWS | Columbia | 85 | Richland County |
| Marietta W/D (Sc2320004) | SC2320004 | CWS | Marietta | 3,255 | Greenville County |
| Mathews Heights (Sc2450021) | SC2450021 | CWS | Greenwood | 73 | Greenwood County |
| Mayesville Town Of (Sc4310003) | SC4310003 | CWS | Sumter | 665 | Sumter County |
| Mcbee Town Of (Sc1310004) | SC1310004 | CWS | Mcbee | 1,239 | Chesterfield County |
| Mccoll Town Of (Sc3410003) | SC3410003 | CWS | Mccoll | 2,445 | Marlboro County |
| Mccords Ferry At Lake Marion (Sc3850004) | SC3850004 | CWS | Santee | 21 | Orangeburg County |
| Mccormick Cpw (Sc3510001) | SC3510001 | CWS | Mccormick | 1,749 | McCormick County |
| Mccrady Training Center (Sc4070911) | SC4070911 | NTNCWS | Eastover | 1,200 | Richland County |
| Mcdonalds Mhp (Sc4060010) | SC4060010 | CWS | Columbia | 16 | Richland County |
| Mcgregor Downs Mhp (Sc3260059) | SC3260059 | CWS | Potomac | 626 | Lexington County |
| Meadow Lane Mhp (Sc4060014) | SC4060014 | CWS | Clearwater | 70 | Richland County |
| Mepkin Abbey (Sc0870972) | SC0870972 | CWS | Moncks Corner | 30 | Berkeley County |
| Meridian Brick (Sc4030007) | SC4030007 | NTNCWS | Columbia | 70 | Richland County |
| Midcounty Water Dist 1 (2020002) | SC2020002 | CWS | Winnsboro | 1,487 | Fairfield County |
| Middleton Place (Sc1870902) | SC1870902 | NTNCWS | Charleston | 85 | Dorchester County |
| Midland Hills Mhp (Sc3260182) | SC3260182 | CWS | Lexington | 66 | Lexington County |
| Mills Mhp 1&2 (Sc3260050) | SC3260050 | CWS | Lexington | 25 | Lexington County |
| Minnie Hughes Elementary (Sc1070124) | SC1070124 | NTNCWS | North Charleston | 227 | Charleston County |
| Miracle Hill Girls (Sc3970111) | SC3970111 | NTNCWS | Greenville | 30 | Pickens County |
| Mitchell Mhp (Sc2460001) | SC2460001 | CWS | Ninety Six | 43 | Greenwood County |
| Mitford Water District (Sc2020005) | SC2020005 | CWS | Great Falls | 1,878 | Chester County, Fairfield County |
| Monetta Town Of (Sc0210008) | SC0210008 | CWS | Monetta | 1,152 | Aiken County, Saluda County |
| Mountain Lake Poa (2370803) | SC2370803 | NTNCWS | Greenville | 129 | Greenville County |
| Murray Hill Estates (Sc3250014) | SC3250014 | CWS | St Louis | 134 | Lexington County |
| N Chester Headstart (Sc1270108) | SC1270108 | NTNCWS | Rock Hill | 110 | Chester County |
| New Cottageville Elementary (1570119) | SC1570119 | NTNCWS | Walterboro | 400 | Colleton County |
| New Holland W/D (Sc0220010) | SC0220010 | CWS | Wagener | 301 | Aiken County |
| Ninety Six Cpw (Sc2410002) | SC2410002 | CWS | Ninety Six | 2,880 | Greenwood County |
| North American Filtration Co (Sc0570900) | SC0570900 | NTNCWS | Denmark | 29 | Bamberg County |
| North Shore Water Sys (Sc1470863) | SC1470863 | CWS | Summerton | 272 | Clarendon County |
| North Town Of (Sc3810010) | SC3810010 | CWS | North | 1,378 | Orangeburg County |
| Norway Town Of (3810008) | SC3810008 | CWS | Norway | 843 | Orangeburg County |
| O Haynes System (0850014) | SC0850014 | CWS | St Louis | 205 | Berkeley County |
| Olanta Town Of (Sc2110006) | SC2110006 | CWS | Olanta | 801 | Florence County |
| Olar Govan Water System (0510004) | SC0510004 | CWS | Olar | 291 | Bamberg County |
| Old Barnwell Golf Course (Sc0270875) | SC0270875 | NTNCWS | Aiken | 150 | Aiken County |
| Orangeburg County (Sc3810012) | SC3810012 | CWS | Santee | 280 | Orangeburg County |
| Oswego Rural Water Co (Sc4320006) | SC4320006 | CWS | Sumter | 3,282 | Sumter County |
| Pageland Town Of | SC1310003 | CWS | Pageland | 3,467 | Chesterfield County |
| Palmetto Mhp 2 (Sc2760013) | SC2760013 | CWS | Hardeeville | 48 | Jasper County |
| Palmetto Park (Sc4060006) | SC4060006 | CWS | Columbia | 132 | Richland County |
| Pamplico Town Of (Sc2110010) | SC2110010 | CWS | Pamplico | 1,734 | Florence County |
| Patrick Henry Academy (Sc2570102) | SC2570102 | NTNCWS | Estill | 368 | Hampton County |
| Pecan Grove Commons (Sc4660003) | SC4660003 | CWS | Rock Hill | 58 | York County |
| Percival Estates Mhp (Sc4060021) | SC4060021 | CWS | Columbia | 12 | Richland County |
| Perry Town Of | SC0210006 | CWS | Perry | 796 | Aiken County |
| Pine Grove Church Cdc (Sc4679015) | SC4679015 | NTNCWS | Clover | 130 | York County |
| Pine Ridge Mhp (Sc3260157) | SC3260157 | CWS | Vancouver | 100 | Lexington County |
| Pine Valley Community (Sc4060024) | SC4060024 | CWS | Columbia | 21 | Richland County |
| Pinehaven S/D (Sc4650037) | SC4650037 | CWS | Clover | 81 | York County |
| Pinewood Town Of (Sc4310002) | SC4310002 | CWS | Pinewood | 455 | Sumter County |
| Piney Lane Mhp (Sc4060052) | SC4060052 | CWS | Clearwater | 32 | Richland County |
| Pleasant Ridge Mhp (Sc3260147) | SC3260147 | CWS | West Columbia | 22 | Lexington County |
| Port Bass I (Sc3750002) | SC3750002 | CWS | Athens | 681 | Oconee County |
| Port Bass Ii (Sc3750012) | SC3750012 | CWS | Athens | 165 | Oconee County |
| Prosperity Town Of (Sc3610005) | SC3610005 | CWS | Prosperity | 1,282 | Newberry County |
| Quail Meadows Park Llc (Sc4660063) | SC4660063 | CWS | Fort Mill | 221 | York County |
| Ranch Road Water (Sc3050008) | SC3050008 | CWS | Laurens | 40 | Laurens County |
| Regency Square 2 (Sc3260170) | SC3260170 | CWS | West Columbia | 99 | Lexington County |
| Resonac Graphite America Inc (Sc1830007) | SC1830007 | NTNCWS | Ridgeville | 230 | Dorchester County |
| Richard Deason Mhp (Sc4160011) | SC4160011 | CWS | Saluda | 55 | Saluda County |
| Richland Co/Pond Drive (Sc4050042) | SC4050042 | CWS | Irmo | 55 | Richland County |
| Richland Estates Mhc (Sc4060038) | SC4060038 | CWS | Chapin | 90 | Richland County |
| Ridge Pointe S/D (Sc3250105) | SC3250105 | CWS | St Louis | 336 | Lexington County |
| Ridge Spring Town Of (Sc4110002) | SC4110002 | CWS | Ridge Spring | 1,575 | Saluda County |
| Ridgeland Town Of (Sc2710001) | SC2710001 | CWS | Ridgeland | 2,678 | Jasper County |
| Ridgeville Industrial Campus (Sc1830031) | SC1830031 | CWS | Summerville | 999 | Dorchester County |
| Ridgeville Town Of (Sc1810004) | SC1810004 | CWS | Ridgeville | 821 | Dorchester County |
| Ridgeway Manor (Sc2070002) | SC2070002 | CWS | Ridgeway | 158 | Fairfield County |
| Ridgeway Town Of (Sc2010002) | SC2010002 | CWS | Ridgeway | 950 | Fairfield County |
| River Bluff S/D (Sc3950005) | SC3950005 | CWS | Salem | 133 | Pickens County |
| Riverview Rural Cws (Sc4620001) | SC4620001 | CWS | Fort Mill | 2,200 | York County |
| Robertville Senior Center (Sc2770105) | SC2770105 | NTNCWS | Ridgeland | 115 | Jasper County |
| Rock Point Hoa (Sc3950007) | SC3950007 | CWS | Pickens | 70 | Pickens County |
| Rockford Place-Charwood (Sc3250099) | SC3250099 | CWS | St Louis | 277 | Lexington County |
| Rocky Creek W/D (Sc4420003) | SC4420003 | CWS | Jonesville | 2,464 | Union County |
| Rolling Meadows Mhp (3260027) | SC3260027 | CWS | West Columbia | 1,056 | Lexington County |
| Salem Town Of (Sc3710001) | SC3710001 | CWS | Salem | 6,444 | Oconee County |
| Salley Town Of (Sc0210005) | SC0210005 | CWS | Salley | 456 | Aiken County |
| Sand Mountain Mhp (Sc3260183) | SC3260183 | CWS | Chapin | 40 | Lexington County |
| Sandy Hill Mhp (Sc4060064) | SC4060064 | CWS | Columbia | 81 | Richland County |
| Sandy Run Mhp (Sc0860037) | SC0860037 | CWS | Summerville | 41 | Berkeley County |
| Santee Cooper Cross Plt (Sc0830019) | SC0830019 | NTNCWS | Pineville | 228 | Berkeley County |
| Santee Town Of (Sc3810011) | SC3810011 | CWS | Santee | 2,388 | Orangeburg County |
| Santuck Hebron Water Co (Sc4420007) | SC4420007 | CWS | Carlisle | 3,109 | Union County |
| Scat Park Water System (0670918) | SC0670918 | NTNCWS | Bamberg | 350 | Barnwell County |
| Scenic Drive Mhp (Sc3260081) | SC3260081 | CWS | Charlotte | 50 | Lexington County |
| Scotia Town Of (Sc2510008) | SC2510008 | CWS | Estill | 161 | Hampton County |
| Scotland Yard Mhp (Sc4660105) | SC4660105 | CWS | Clover | 53 | York County |
| Scranton Town Of (Sc2110009) | SC2110009 | CWS | Scranton | 1,133 | Florence County |
| Shady Acres (Sc3250060) | SC3250060 | CWS | Chapin | 73 | Lexington County |
| Sharon Town Of (Sc4610005) | SC4610005 | CWS | Sharon | 573 | York County |
| Shaw Mobile Home Park (Sc4360012) | SC4360012 | CWS | Sumter | 173 | Sumter County |
| Shealy Estates Iii (Sc3250102) | SC3250102 | CWS | St Louis | 70 | Lexington County |
| Shiloh Water System (Sc4320005) | SC4320005 | CWS | Sumter | 645 | Sumter County |
| Silver Hill Manuf Home Comm. (Sc4060019) | SC4060019 | CWS | Potomac | 180 | Richland County |
| Silver Springs W/D (Sc3820002) | SC3820002 | CWS | Neeses | 2,660 | Orangeburg County |
| Smoaks Town Of (Sc1510002) | SC1510002 | CWS | Smoaks | 176 | Colleton County |
| South Of The Border (Sc1770208) | SC1770208 | NTNCWS | Dillon | 300 | Dillon County |
| Springfield Town Of (Sc3810009) | SC3810009 | CWS | Springfield | 700 | Orangeburg County |
| St George Town Of (Sc1810001) | SC1810001 | CWS | Saint George | 2,300 | Dorchester County |
| St James School (Sc1070143) | SC1070143 | NTNCWS | North Charleston | 240 | Charleston County |
| St James-Santee Fhc Inc (Sc1070006) | SC1070006 | NTNCWS | Mcclellanville | 26 | Charleston County |
| St Matthews Town Of (Sc0910001) | SC0910001 | CWS | St Matthews | 2,644 | Calhoun County |
| Stephenson'S Lake (Sc3250018) | SC3250018 | CWS | Prosperity | 55 | Lexington County, Newberry County |
| Stuckey Town Of (Sc4510003) | SC4510003 | CWS | Stuckey | 317 | Williamsburg County |
| Sullivans Island Town Of (1010003) | SC1010003 | CWS | Sullivans Island | 2,521 | Charleston County |
| Summerton Town Of (Sc1410003) | SC1410003 | CWS | Summerton | 2,096 | Clarendon County |
| Sumter Co-Wedgefield-Stateburg Wd | SC4320002 | CWS | Sumter | 1,200 | Sumter County |
| Sumter-Wessex S/D (Sc4350016) | SC4350016 | CWS | Sumter | 412 | Sumter County |
| Sunnyvale Mhp (Sc3260138) | SC3260138 | CWS | Lexington | 65 | Lexington County |
| Sunset Pointe S/D (Sc3050013) | SC3050013 | CWS | Simpsonville | 60 | Greenville County, Laurens County |
| Suominen Nonwovens (Sc2830003) | SC2830003 | NTNCWS | Bethune | 200 | Kershaw County |
| Swansea Town Of (Sc3210006) | SC3210006 | CWS | Lexington | 1,923 | Lexington County |
| Sylvamo Eastover Mill (Sc4030005) | SC4030005 | NTNCWS | Eastover | 750 | Richland County |
| Table Rock Resort (Sc3970300) | SC3970300 | CWS | Easley | 108 | Pickens County |
| Talatha W/D | SC0220005 | CWS | New Ellenton | 1,252 | Aiken County |
| Taylor Mh Estate (Sc0760015) | SC0760015 | CWS | Beaufort | 162 | Beaufort County |
| Timber Lake I (Sc3750006) | SC3750006 | CWS | Athens | 283 | Oconee County |
| Timber Lake Ii (Sc3750007) | SC3750007 | CWS | Athens | 93 | Oconee County |
| Timbermen Inc 'The' (4130002) | SC4130002 | NTNCWS | Johnston | 75 | Saluda County |
| Tremron (Sc3870941) | SC3870941 | NTNCWS | Bowman | 50 | Orangeburg County |
| Tri-County Electric Coop (0970901) | SC0970901 | NTNCWS | St Matthews | 50 | Calhoun County |
| Triple Acres Mhp 1 (Sc3260049) | SC3260049 | CWS | West Columbia | 38 | Lexington County |
| Triple Acres Mhp 2 (Sc3260029) | SC3260029 | CWS | West Columbia | 29 | Lexington County |
| Trolley Run Station Development(0220016) | SC0220016 | CWS | Gloverville | 4,361 | Aiken County |
| Turbeville Town Of (Sc1410004) | SC1410004 | CWS | Turbeville | 735 | Clarendon County |
| Turtlehead At Keowee S/D (Sc3750022) | SC3750022 | CWS | West Union | 32 | Oconee County, Pickens County |
| Twin Lakes Estates (Sc4660007) | SC4660007 | CWS | Fort Mill | 550 | York County |
| Ulmer Town Of (Sc0310002) | SC0310002 | CWS | Ulmer | 245 | Allendale County |
| Unimin-Office Complex (2830011) | SC2830011 | NTNCWS | Lugoff | 28 | Kershaw County |
| Upper Calhoun/Belleville (0920001) | SC0920001 | CWS | Gaston | 1,779 | Calhoun County |
| Upper Calhoun/Sandy Run (Sc0920002) | SC0920002 | CWS | Gaston | 1,247 | Calhoun County |
| Us Silica (Sc3230005) | SC3230005 | NTNCWS | West Columbia | 44 | Lexington County |
| Valmont Coatings Inc (Sc3240001) | SC3240001 | NTNCWS | West Columbia | 25 | Lexington County |
| Varnville Town Of (Sc2510005) | SC2510005 | CWS | Hampton | 1,865 | Hampton County |
| Veronas Child Development Academy | SC1570932 | NTNCWS | Cottageville | 25 | Colleton County |
| View At The Pier The (Sc3770300) | SC3770300 | CWS | Seneca | 864 | Oconee County |
| Wa Burbage Trailer Park 1 (1060014) | SC1060014 | CWS | Ravenel | 81 | Charleston County |
| Wagener Town Of (Sc0210004) | SC0210004 | CWS | Wagener | 1,210 | Aiken County |
| Wallace Water Company | SC3420002 | CWS | Wallace | 3,552 | Marlboro County |
| Water Oak Utility Co (Sc0750002) | SC0750002 | CWS | Hilton Head | 2,318 | Beaufort County |
| Waterlynn Downs (Sc4660045) | SC4660045 | CWS | Lake Wylie | 92 | York County |
| Wells East S/D (Sc0750026) | SC0750026 | CWS | Hilton Head Island | 60 | Beaufort County |
| West Fraser (Sc0330005) | SC0330005 | NTNCWS | Fairfax | 137 | Allendale County |
| West Union Town Of (3710005) | SC3710005 | CWS | West Union | 468 | Oconee County |
| Westrock (Sc2130003) | SC2130003 | NTNCWS | Florence | 377 | Florence County |
| Westside Estates Apts (Sc1370300) | SC1370300 | CWS | Pageland | 87 | Chesterfield County |
| Whetstone Academy (Sc3770106) | SC3770106 | NTNCWS | Mountain Rest | 55 | Oconee County |
| Whispering Pines Mhp (Sc4360021) | SC4360021 | CWS | Sumter | 80 | Sumter County |
| Whitley Estates (4660055) | SC4660055 | CWS | Fort Mill | 93 | York County |
| Whitmire Town Of (Sc3610004) | SC3610004 | CWS | Whitmire | 2,415 | Newberry County |
| Wild Meadows S/D (Sc3250097) | SC3250097 | CWS | Lexington | 878 | Lexington County |
| Williams Farm Labor House (Sc1571002) | SC1571002 | NTNCWS | Islandton | 150 | Colleton County |
| Williams Town Of (Sc1510003) | SC1510003 | CWS | Williams | 103 | Colleton County |
| Williston Town Of (Sc0610002) | SC0610002 | CWS | Williston | 3,251 | Barnwell County |
| Willwood S/D (4650004) | SC4650004 | CWS | Rock Hill | 122 | York County |
| Windwood Farm Home (Sc1070963) | SC1070963 | CWS | Awendaw | 33 | Charleston County |
| Winsor Valley Mhp (Sc4060008) | SC4060008 | CWS | Columbia | 68 | Richland County |
| Wright Way Cdc - Vance (Sc3870116) | SC3870116 | NTNCWS | Eutawville | 25 | Orangeburg County |
| Wyboo Water Dept Inc (Sc1450009) | SC1450009 | CWS | Manning | 618 | Clarendon County |
| Yemassee Town Of (Sc2510006) | SC2510006 | CWS | Hampton | 2,202 | Beaufort County, Hampton County |