Results from entry points (water leaving treatment, not household taps) of public water systems sampled under EPA's Fifth Unregulated Contaminant Monitoring Rule. Click a county to see every water system serving it, or turn on service areas and click a location to see the systems that serve that spot.
268 of the 1,023 public water systems listed for Louisiana were sampled. Sorted by the highest single result relative to EPA's 2024 limits. Each name links to a page with all of that system's results. All 1,023 Louisiana systems, including those not tested · Download all Louisiana results (CSV, gzip)
| System | PWSID | City | Population | PFOA (ppt) | PFOS (ppt) | HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Town Of Vidalia Water System | LA1029011 | Vidalia | 6,354 | 20.1 | 8.5 | 0.532 | PFOA ≥ 3 × its limit |
| Village Of Parks Water System | LA1099008 | Parks | 12,801 | 6.4 | 4.3 | 0 | PFOA 1–3 × its limit |
| City Of Plaquemine Water System | LA1047005 | Plaquemine | 14,043 | 6.2 | 6 | 0.002 | PFOA 1–3 × its limit |
| Port Sulphur Water District | LA1075006 | Belle Chasse | 10,308 | <MRL | 4.6 | 0 | PFOS 1–3 × its limit |
| New Orleans Algiers Water Works | LA1071001 | New Orleans | 52,785 | 4 | 4.5 | 0 | PFOS 1–3 × its limit |
| Parish Utilities Of Ascension | LA1005035 | Donaldsonville | 9,732 | <MRL | 4.5 | 0.002 | PFOS 1–3 × its limit |
| New Orleans Carrollton Water Works | LA1071009 | New Orleans | 334,903 | 4.1 | 4.2 | 0.54 | PFOS 1–3 × its limit |
| City Of Abbeville Water System | LA1113001 | Abbeville | 14,217 | <MRL | <MRL | 0.37 | Hazard Index below its limit |
| Town Of Rayville Water System | LA1083006 | Rayville | 4,842 | <MRL | <MRL | 0.34 | Hazard Index below its limit |
| St John Water District 2 | LA1095002 | Laplace | 3,702 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Village Water System | LA1015018 | Benton | 24,813 | <MRL | <MRL | 0.002 | Hazard Index below its limit |
| Assumption Parish Ww District 1 | LA1007001 | Napoleonville | 21,366 | <MRL | <MRL | 0 | Other PFAS detected |
| Belle Chasse Water District | LA1075001 | Belle Chasse | 19,644 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Berwick | LA1101014 | Berwick | 5,024 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Franklin Water Supply | LA1101003 | Franklin | 8,325 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Jeanerette Water System | LA1045004 | Jeanerette | 6,189 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Mansfield Water System | LA1031009 | Mansfield | 7,512 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Monroe Water System | LA1073031 | Monroe | 57,000 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Natchitoches Water System | LA1069007 | Natchitoches | 26,910 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Patterson Water System | LA1101006 | Patterson | 8,456 | <MRL | <MRL | 0 | Other PFAS detected |
| City Of Shreveport Water System | LA1017031 | Shreveport | 192,378 | <MRL | <MRL | 0 | Other PFAS detected |
| Desoto Parish Water Works District 1 | LA1031030 | Mansfield | 7,173 | <MRL | <MRL | 0 | Other PFAS detected |
| E Jefferson Ww District 1 | LA1051001 | Jefferson | 275,163 | <MRL | <MRL | 0 | Other PFAS detected |
| Gretna Waterworks | LA1051003 | Gretna | 17,026 | <MRL | <MRL | 0 | Other PFAS detected |
| Houma Water Treatment Service Area | LA1109001 | Houma | 11,658 | <MRL | <MRL | 0 | Other PFAS detected |
| Intracoastal Water System West | LA1047002 | Plaquemine | 6,489 | <MRL | <MRL | 0 | Other PFAS detected |
| Lafourche Water District 1 | LA1057001 | Lockport | 81,609 | <MRL | <MRL | 0 | Other PFAS detected |
| Magnolia - Town & Country Service | LA1073054 | St. Louis | 5,715 | <MRL | <MRL | 0 | Other PFAS detected |
| Pinehill Waterworks District | LA1017027 | Shreveport | 4,926 | <MRL | <MRL | 0 | Other PFAS detected |
| Pointe Coupee Water Works District 1 | LA1077043 | New Roads | 10,629 | <MRL | <MRL | 0 | Other PFAS detected |
| Schriever Water Treatment Service Area | LA1109002 | Houma | 116,460 | <MRL | <MRL | 0 | Other PFAS detected |
| South Toledo Bend Water District | LA1085055 | Many | 5,943 | <MRL | <MRL | 0 | Other PFAS detected |
| Southwest Allen Ww District No 2 | LA1003009 | Kinder | 8,106 | <MRL | <MRL | 0 | Other PFAS detected |
| St Charles Parish Dept Of Waterworks | LA1089001 | Luling | 52,879 | <MRL | <MRL | 0 | Other PFAS detected |
| St James Water District 2 | LA1093005 | Convent | 7,513 | <MRL | <MRL | 0 | Other PFAS detected |
| St John Water District 1 | LA1095003 | Laplace | 10,484 | <MRL | <MRL | 0 | Other PFAS detected |
| St Mary Parish W&S #2 Bayou Vista | LA1101015 | Patterson | 5,379 | <MRL | <MRL | 0 | Other PFAS detected |
| St Mary Water & Sewer Comm #3 | LA1101010 | Centerville | 7,828 | <MRL | <MRL | 0 | Other PFAS detected |
| St Tam Parish - Cross Gates Sd | LA1103053 | Covington | 8,037 | <MRL | <MRL | 0 | Other PFAS detected |
| Tensas Water District Association | LA1107009 | St Joseph | 3,843 | <MRL | <MRL | 0 | Other PFAS detected |
| Town Of Benton Water System | LA1015002 | Benton | 8,037 | <MRL | <MRL | 0 | Other PFAS detected |
| Town Of Farmerville Water System | LA1111005 | Farmerville | 5,352 | <MRL | <MRL | 0 | Other PFAS detected |
| Town Of Gramercy Waterworks | LA1093002 | Gramercy | 2,860 | <MRL | <MRL | 0 | Other PFAS detected |
| Town Of Greenwood Water System | LA1017014 | Greenwood | 5,205 | <MRL | <MRL | 0 | Other PFAS detected |
| Town Of Lutcher Waterworks | LA1093003 | Lutcher | 4,781 | <MRL | <MRL | 0 | Other PFAS detected |
| Town Of Many Water System | LA1085016 | Many | 4,428 | <MRL | <MRL | 0 | Other PFAS detected |
| W Jefferson Ww District 2 | LA1051004 | Jefferson | 140,264 | <MRL | <MRL | 0 | Other PFAS detected |
| Water & Sewer Commission 4 Of St Mary | LA1101011 | Charenton | 9,709 | <MRL | <MRL | 0 | Other PFAS detected |
| Archibald Water System | LA1083012 | Archibald | 4,200 | <MRL | <MRL | 0 | No PFAS detected |
| Avoyelles Parish Waterworks District 1 | LA1009002 | Bordelonville | 3,900 | <MRL | <MRL | 0 | No PFAS detected |
| Avoyelles Ward One Water System Inc | LA1009016 | Effie | 3,726 | <MRL | <MRL | 0 | No PFAS detected |
| Barksdale Afb Water System | LA1015022 | Barksdale Afb | 13,000 | <MRL | <MRL | 0 | No PFAS detected |
| Bastrop Water System | LA1067003 | Bastrop | 18,105 | <MRL | <MRL | 0 | No PFAS detected |
| Baton Rouge Water Company | LA1033005 | Baton Rouge | 596,844 | <MRL | <MRL | 0 | No PFAS detected |
| Bayou Des Cannes Water System | LA1039016 | Basile | 4,530 | <MRL | <MRL | 0 | No PFAS detected |
| Bayou Liberty Water Association | LA1103005 | Slidell | 10,791 | <MRL | <MRL | 0 | No PFAS detected |
| Bayou Teche Water Works | LA1099002 | Loreauville | 10,137 | <MRL | <MRL | 0 | No PFAS detected |
| Beau Chene Water System | LA1103006 | Mandeville | 4,650 | <MRL | <MRL | 0 | No PFAS detected |
| Beauregard District No 2 Ward No 5 | LA1011012 | Singer | 6,613 | <MRL | <MRL | 0 | No PFAS detected |
| Beauregard Water Works Dist #3 | LA1011008 | Longville | 24,000 | <MRL | <MRL | 0 | No PFAS detected |
| Bogue-Lusa Water Works District | LA1117009 | Angie | 4,200 | <MRL | <MRL | 0 | No PFAS detected |
| Brouillette Water System Inc | LA1009003 | Marksville | 3,732 | <MRL | <MRL | 0 | No PFAS detected |
| Buckeye Water District 50 | LA1079004 | Deville | 12,078 | <MRL | <MRL | 0 | No PFAS detected |
| Cadeville Water District | LA1073060 | West Monroe | 6,219 | <MRL | <MRL | 0 | No PFAS detected |
| Calcasieu Parish Ww Dist 9 Carlyss | LA1019116 | Sulphur | 14,502 | <MRL | <MRL | 0 | No PFAS detected |
| Calcasieu Parish Ww District 7 | LA1019114 | Dequincy | 4,791 | <MRL | <MRL | 0 | No PFAS detected |
| Calcasieu Parish Ww District 8 | LA1019118 | Lake Charles | 6,834 | <MRL | <MRL | 0 | No PFAS detected |
| Calcasieu Parish Ww District No 1 | LA1019051 | Lake Charles | 20,837 | <MRL | <MRL | 0 | No PFAS detected |
| Calcasieu Parish Ww District No 4 | LA1019053 | Westlake | 5,340 | <MRL | <MRL | 0 | No PFAS detected |
| Calcasieu Parish Ww District No 5 | LA1019084 | Lake Charles | 5,088 | <MRL | <MRL | 0 | No PFAS detected |
| Calhoun Water System | LA1073006 | West Monroe | 1,239 | <MRL | <MRL | 0 | No PFAS detected |
| Cameron Parish Ww District 11-Sweet Lake | LA1023011 | Bell City | 3,675 | <MRL | <MRL | 0 | No PFAS detected |
| Cameron Parish Ww District 9 | LA1023012 | Grand Chenier | 871 | <MRL | <MRL | 0 | No PFAS detected |
| Cecilia Water Corporation | LA1099005 | Cecilia | 12,420 | <MRL | <MRL | 0 | No PFAS detected |
| Chataignier Water System | LA1039002 | Ville Platte | 642 | <MRL | <MRL | 0 | No PFAS detected |
| Cheniere Drew North Water System | LA1073100 | West Monroe | 11,280 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Alexandria Water System | LA1079001 | Alexandria | 66,798 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Baker Water System | LA1033003 | Baker | 13,855 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Bogalusa Water System | LA1117001 | Bogalusa | 14,000 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Bossier City Water System | LA1015004 | Bossier City | 79,506 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Breaux Bridge Water System | LA1099003 | Breaux Bridge | 10,098 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Broussard Water System | LA1055003 | Broussard | 5,151 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Carencro Water System | LA1055005 | Carencro | 11,301 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Covington Water Supply | LA1103011 | Covington | 16,185 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Denham Springs Water System | LA1063004 | Denham Springs | 25,725 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Deridder Water System | LA1011001 | Deridder | 14,400 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Gonzales Water System | LA1005030 | Gonzales | 16,806 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Hammond Water System | LA1105009 | Hammond | 21,135 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Jennings Water System | LA1053003 | Jennings | 9,837 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Kaplan Water System | LA1113009 | Kaplan | 4,340 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Lake Charles Water System | LA1019029 | Lake Charles | 79,500 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Lake Providence Water System | LA1035002 | Lake Providence | 5,850 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Leesville Water System | LA1115019 | Leesville | 10,545 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Mandeville Water Supply | LA1103023 | Mandeville | 13,000 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Marksville Water System | LA1009011 | Marksville | 7,593 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Minden Water System | LA1119021 | Minden | 16,281 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Morgan City Water System | LA1101005 | Morgan City | 12,703 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Oakdale Water System | LA1003006 | Oakdale | 6,114 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Opelousas Water System | LA1097010 | Opelousas | 20,388 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Pineville Water System | LA1079016 | Pineville | 20,358 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Pontchatoula Water System | LA1105019 | Ponchatoula | 6,657 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Port Allen Water System | LA1121014 | Port Allen | 6,759 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Rayne Water System | LA1001007 | Rayne | 10,908 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Ruston Water System | LA1061017 | Ruston | 22,468 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Scott Water System | LA1055026 | Scott | 9,696 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Slidell Water Supply | LA1103041 | Slidell | 35,547 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Springhill Water System | LA1119028 | Springhill | 7,800 | <MRL | <MRL | 0 | No PFAS detected |
| City Of St. Martinville Water System | LA1099007 | St. Martinville | 7,263 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Sulphur Water System | LA1019044 | Sulphur | 24,489 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Tallulah Water System | LA1065003 | Tallulah | 8,601 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Ville Platte Water System | LA1039010 | Ville Platte | 6,590 | <MRL | <MRL | 0 | No PFAS detected |
| City Of West Monroe Water System | LA1073056 | West Monroe | 16,005 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Westlake Water System | LA1019054 | Westlake | 4,858 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Winnfield Water System | LA1127012 | Winnfield | 7,194 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Winnsboro Water System | LA1041006 | Winnsboro | 7,518 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Youngsville Purchase Ws | LA1055195 | Youngsville | 10,281 | <MRL | <MRL | 0 | No PFAS detected |
| City Of Zachary Water System | LA1033030 | Zachary | 31,569 | <MRL | <MRL | 0 | No PFAS detected |
| Concordia Waterworks District 1 | LA1029003 | Ferriday | 6,921 | <MRL | <MRL | 0 | No PFAS detected |
| Consolidated Water District No. 2 | LA1067012 | Bastrop | 3,498 | <MRL | <MRL | 0 | No PFAS detected |
| Culbertson Water System | LA1061024 | Choudrant | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Cypress Black Bayou Water System | LA1015040 | Benton | 5,520 | <MRL | <MRL | 0 | No PFAS detected |
| Dow Usa, La Division | LA2047003 | Plaquemine | 3,960 | <MRL | <MRL | 0 | No PFAS detected |
| Doyline Waterworks District 1 | LA1119008 | Doyline | 969 | <MRL | <MRL | 0 | No PFAS detected |
| East Carroll Ws South | LA1035007 | Transylvania | 1,071 | <MRL | <MRL | 0 | No PFAS detected |
| East Central Vernon Water System | LA1115117 | Slagle | 6,363 | <MRL | <MRL | 0 | No PFAS detected |
| East Feliciana Rural Water | LA1037004 | Ethel | 14,829 | <MRL | <MRL | 0 | No PFAS detected |
| East Iberville Water System | LA1047007 | Plaquemine | 6,657 | <MRL | <MRL | 0 | No PFAS detected |
| East Side Water System | LA1039003 | Ville Platte | 5,718 | <MRL | <MRL | 0 | No PFAS detected |
| Ebarb Wwks Dist # 1 - Aimwell Area | LA1085059 | Zwolle | 6,738 | <MRL | <MRL | 0 | No PFAS detected |
| Egan Water Corporation | LA1001025 | Egan | 5,337 | <MRL | <MRL | 0 | No PFAS detected |
| Fairview Union Water System | LA1081012 | Coushatta | 2,346 | <MRL | <MRL | 0 | No PFAS detected |
| False River Water Company | LA1077041 | New Roads | 4,014 | <MRL | <MRL | 0 | No PFAS detected |
| Fifth Ward Water System | LA1009007 | Marksville | 5,676 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Polk North Water System | LA1115064 | Fort Polk | 9,420 | <MRL | <MRL | 0 | No PFAS detected |
| Fort Polk South Water System | LA1115065 | Fort Polk | 10,902 | <MRL | <MRL | 0 | No PFAS detected |
| Gardner Community Water System | LA1079010 | Boyce | 4,566 | <MRL | <MRL | 0 | No PFAS detected |
| Gillis Long Center | LA1047008 | Carville | 600 | <MRL | <MRL | 0 | No PFAS detected |
| Gowc Brownville Water System | LA1073004 | West Monroe | 9,696 | <MRL | <MRL | 0 | No PFAS detected |
| Gowc East Water System | LA1073121 | West Monroe | 11,742 | <MRL | <MRL | 0 | No PFAS detected |
| Gowc Kiroli Darbonne Ws | LA1073020 | West Monroe | 9,210 | <MRL | <MRL | 0 | No PFAS detected |
| Gowc North Water System | LA1073120 | West Monroe | 13,287 | <MRL | <MRL | 0 | No PFAS detected |
| Gowc South Monroe Ws | LA1073046 | West Monroe | 7,335 | <MRL | <MRL | 0 | No PFAS detected |
| Gowc West Hwy 80 Ark Road Ws | LA1073055 | West Monroe | 14,649 | <MRL | <MRL | 0 | No PFAS detected |
| Grambling State University Ws | LA1061005 | Grambling | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Greater Ward 1 Waterworks District | LA1061007 | Ruston | 3,333 | <MRL | <MRL | 0 | No PFAS detected |
| Henderson Nina Water System Inc | LA1099006 | Breaux Bridge | 6,010 | <MRL | <MRL | 0 | No PFAS detected |
| Houston River Waterworks District 11 | LA1019119 | Sulphur | 6,915 | <MRL | <MRL | 0 | No PFAS detected |
| Iberia Water Works District 3 - Coteau | LA1045002 | New Iberia | 8,775 | <MRL | <MRL | 0 | No PFAS detected |
| Jeff Davis Central Waterworks District | LA1053012 | Welsh | 5,709 | <MRL | <MRL | 0 | No PFAS detected |
| Jeff Davis Water And Sewer Commission 1 | LA1053014 | Lake Arthur | 9,780 | <MRL | <MRL | 0 | No PFAS detected |
| Jeff Davis Water District 4 | LA1053013 | Jennings | 4,194 | <MRL | <MRL | 0 | No PFAS detected |
| Keatchie Water System | LA1031007 | Grand Cane | 4,446 | <MRL | <MRL | 0 | No PFAS detected |
| Kolin Ruby Wise Waterwork District 11 A | LA1079023 | Pineville | 4,992 | <MRL | <MRL | 0 | No PFAS detected |
| Lafayette Utilities Water System | LA1055017 | Lafayette | 169,389 | <MRL | <MRL | 0 | No PFAS detected |
| Lawco - Crowley Water System | LA1001002 | Baton Rouge | 17,634 | <MRL | <MRL | 0 | No PFAS detected |
| Lawco - Dequincy Water System | LA1019008 | Baton Rouge | 5,319 | <MRL | <MRL | 0 | No PFAS detected |
| Lawco - Eunice Water System | LA1097022 | Baton Rouge | 15,471 | <MRL | <MRL | 0 | No PFAS detected |
| Lawco - New Iberia Water System | LA1045009 | Baton Rouge | 59,928 | <MRL | <MRL | 0 | No PFAS detected |
| Lawtell Water Works District No 1 | LA1097004 | Lawtell | 3,717 | <MRL | <MRL | 0 | No PFAS detected |
| Lee Road Water Corporation | LA1103020 | Covington | 7,665 | <MRL | <MRL | 0 | No PFAS detected |
| Lena Water System Inc | LA1079019 | Lena | 3,417 | <MRL | <MRL | 0 | No PFAS detected |
| Lewisburg Bellevue Water System | LA1097006 | Opelousas | 8,325 | <MRL | <MRL | 0 | No PFAS detected |
| Louisiana State Penitentiary | LA1125005 | Angola | 6,362 | <MRL | <MRL | 0 | No PFAS detected |
| Lpwd North Production Facility | LA1055171 | Lafayette | 4,122 | <MRL | <MRL | 0 | No PFAS detected |
| Lpwd South | LA1055156 | Duson | 15,132 | <MRL | <MRL | 0 | No PFAS detected |
| Lpwdn North Region | LA1055191 | Lafayette | 16,833 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia Plantation Water System Inc | LA1113032 | Abbeville | 8,769 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia-Eden Isles | LA1103013 | St. Louis | 10,155 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia-Greenleaves | LA1103118 | St. Louis | 8,031 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia-Ossun Heights | LA1055140 | St. Louis | 393 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia-Resolve Whisperwood | LA1103046 | St. Louis | 6,867 | <MRL | <MRL | 0 | No PFAS detected |
| Magnolia-The Meadows | LA1103106 | St. Louis | 4,701 | <MRL | <MRL | 0 | No PFAS detected |
| Milton Purchase Water System | LA1055196 | Milton | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Mire Branch Water Corporation | LA1001024 | Church Point | 9,480 | <MRL | <MRL | 0 | No PFAS detected |
| Monterey Rural Water System Inc | LA1029007 | Monterey | 5,250 | <MRL | <MRL | 0 | No PFAS detected |
| Natchitoches Parish Wwks District 2 | LA1069006 | Natchez | 8,415 | <MRL | <MRL | 0 | No PFAS detected |
| New Carroll Water System | LA1123005 | Kilbourne | 3,507 | <MRL | <MRL | 0 | No PFAS detected |
| North Desoto Water System | LA1031011 | Stonewall | 7,608 | <MRL | <MRL | 0 | No PFAS detected |
| North Franklin Water Works | LA1041003 | Crowville | 7,989 | <MRL | <MRL | 0 | No PFAS detected |
| North Iberville Water System | LA1047024 | Plaquemine | 1,524 | <MRL | <MRL | 0 | No PFAS detected |
| North Of Crowley Water Corporation | LA1001023 | Rayne | 4,020 | <MRL | <MRL | 0 | No PFAS detected |
| Plaisance Water System | LA1097012 | Opelousas | 6,465 | <MRL | <MRL | 0 | No PFAS detected |
| Pleasant Valley Water System | LA1119023 | Minden | 1,683 | <MRL | <MRL | 0 | No PFAS detected |
| Pollock Area Water System Inc | LA1043017 | Pollock | 3,900 | <MRL | <MRL | 0 | No PFAS detected |
| Prairie Ronde Water System Inc | LA1097014 | Lawtell | 6,105 | <MRL | <MRL | 0 | No PFAS detected |
| Rapides Island Water Association Inc | LA1079020 | Boyce | 5,658 | <MRL | <MRL | 0 | No PFAS detected |
| Rapides Parish Waterworks District 3 | LA1079017 | Tioga | 19,983 | <MRL | <MRL | 0 | No PFAS detected |
| Rural Franklinton Water | LA1117003 | Franklinton | 3,450 | <MRL | <MRL | 0 | No PFAS detected |
| Sabine Parish Water District 1 | LA1085036 | Many | 7,833 | <MRL | <MRL | 0 | No PFAS detected |
| Savoy Swords Water System Inc | LA1097024 | Eunice | 7,326 | <MRL | <MRL | 0 | No PFAS detected |
| South Claiborne Water System | LA1027006 | Athens | 3,843 | <MRL | <MRL | 0 | No PFAS detected |
| South Grant Water Corporation | LA1043008 | Bentley | 5,289 | <MRL | <MRL | 0 | No PFAS detected |
| South Rayne Water Corporation | LA1001022 | Rayne | 4,254 | <MRL | <MRL | 0 | No PFAS detected |
| South Vernon Parish Waterworks District | LA1115118 | Rosepine | 4,083 | <MRL | <MRL | 0 | No PFAS detected |
| Southeast Waterworks District 2 | LA1113031 | Abbeville | 6,810 | <MRL | <MRL | 0 | No PFAS detected |
| Southwest Ouachita Waterworks, Inc | LA1073047 | West Monroe | 10,725 | <MRL | <MRL | 0 | No PFAS detected |
| St Bernard Parish Waterworks | LA1087001 | Chalmette | 44,783 | <MRL | <MRL | 0 | No PFAS detected |
| St James Water District 1 | LA1093004 | Convent | 7,200 | <MRL | <MRL | 0 | No PFAS detected |
| St John Water District 3 | LA1095007 | Laplace | 31,965 | <MRL | <MRL | 0 | No PFAS detected |
| St Landry Water Works District 2 Rural | LA1097033 | Sunset | 4,761 | <MRL | <MRL | 0 | No PFAS detected |
| St Tam Parish - Briarwood Terrace | LA1103079 | Covington | 17,536 | <MRL | <MRL | 0 | No PFAS detected |
| St Tam Parish- Bedico -Faubourg-Coquille | LA1103149 | Covington | 18,372 | <MRL | <MRL | 0 | No PFAS detected |
| St Tammany Water District #2 | LA1103033 | Covington | 5,200 | <MRL | <MRL | 0 | No PFAS detected |
| Summerville Water System | LA1059009 | Jena | 1,425 | <MRL | <MRL | 0 | No PFAS detected |
| Tangipahoa (Second Ward) Water District | LA1105077 | Natalbany | 4,112 | <MRL | <MRL | 0 | No PFAS detected |
| Tangipahoa Parish Water District | LA1105008 | Natalbany | 75,873 | <MRL | <MRL | 0 | No PFAS detected |
| Thibodaux Waterworks | LA1057003 | Thibodaux | 14,862 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Abita Springs Water System | LA1103002 | Abita Springs | 3,693 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Albany Water System | LA1063022 | Albany | 7,305 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Amite Water System | LA1105001 | Amite | 4,300 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Arcadia Water System | LA1013003 | Arcadia | 4,146 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Arnaudville Water System | LA1099001 | Arnaudville | 3,957 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Blanchard Water System | LA1017006 | Blanchard | 16,488 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Bunkie Water System | LA1009004 | Bunkie | 5,169 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Church Point Water System | LA1001001 | Church Point | 4,176 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Coushatta Water System | LA1081001 | Coushatta | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Delhi Water Supply | LA1083002 | Delhi | 4,071 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Erath Water System | LA1113005 | Erath | 2,985 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Ferriday Water System | LA1029005 | Ferriday | 3,816 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Franklinton Water System | LA1117002 | Franklinton | 4,150 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Grambling Water System | LA1061006 | Grambling | 4,949 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Haughton Water System | LA1015011 | Haughton | 5,355 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Homer Water System | LA1027003 | Denham Springs | 4,365 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Iowa Water System | LA1019026 | Iowa | 3,636 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Jena Water System | LA1059003 | Jena | 3,614 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Jonesboro Water System | LA1049010 | Jonesboro | 6,231 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Lake Arthur Water System | LA1053005 | Lake Arthur | 2,706 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Leonville Water System | LA1097005 | Leonville | 9,552 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Livingston Water System | LA1063013 | Livingston | 8,946 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Mamou Water System | LA1039005 | Mamou | 4,559 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Maringouin | LA1047003 | Maringouin | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of New Llano Water System | LA1115022 | New Llano | 3,300 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of New Roads Water System | LA1077026 | New Roads | 9,024 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Pearl River | LA1103157 | Pearl River | 3,333 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Port Barre Water System | LA1097013 | Port Barre | 3,828 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Sunset Water System | LA1097015 | Sunset | 4,356 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Vinton Water System | LA1019048 | Vinton | 4,101 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Vivian Water System | LA1017037 | Vivian | 4,050 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Walker Water System | LA1063017 | Walker | 15,813 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Welsh Water System | LA1053006 | Welsh | 4,311 | <MRL | <MRL | 0 | No PFAS detected |
| Town Of Woodworth Water System | LA1079027 | Woodworth | 4,818 | <MRL | <MRL | 0 | No PFAS detected |
| Trecora | LA2033025 | Baton Rouge | 100 | <MRL | <MRL | 0 | No PFAS detected |
| United Water System | LA1099009 | Arnaudville | 4,446 | <MRL | <MRL | 0 | No PFAS detected |
| Utilities Inc - Hammond Heights | LA1105010 | Mandeville | 4,281 | <MRL | <MRL | 0 | No PFAS detected |
| Utilities Inc - Kingspoint Subdivision | LA1103055 | Mandeville | 6,351 | <MRL | <MRL | 0 | No PFAS detected |
| Utilities Inc - North Park Water Supply | LA1103124 | Mandeville | 11,298 | <MRL | <MRL | 0 | No PFAS detected |
| Varnado Water Works | LA1117006 | Angie | 4,230 | <MRL | <MRL | 0 | No PFAS detected |
| Varnado Water Works - Pine | LA1117025 | Angie | 840 | <MRL | <MRL | 0 | No PFAS detected |
| Vermilion Waterworks District 1 | LA1113034 | Maurice | 24,132 | <MRL | <MRL | 0 | No PFAS detected |
| Vernon Parish Water And Sewer Commission | LA1115071 | New Llano | 5,295 | <MRL | <MRL | 0 | No PFAS detected |
| Village Of Dubach Water System | LA1061003 | Dubach | 1,218 | <MRL | <MRL | 0 | No PFAS detected |
| Village Of Folsom Water Supply | LA1103014 | Folsom | 1,992 | <MRL | <MRL | 0 | No PFAS detected |
| Village Of Forest Hill | LA1079009 | Forest Hill | 3,600 | <MRL | <MRL | 0 | No PFAS detected |
| Village Of Greensburg Water System | LA1091004 | Greensburg | 1,340 | <MRL | <MRL | 0 | No PFAS detected |
| Village Of Plaucheville Water System | LA1009013 | Plaucheville | 4,233 | <MRL | <MRL | 0 | No PFAS detected |
| Village Of Turkey Creek Water System | LA1039013 | Turkey Creek | 5,289 | <MRL | <MRL | 0 | No PFAS detected |
| Ward Ii Water District | LA1063039 | Denham Springs | 78,147 | <MRL | <MRL | 0 | No PFAS detected |
| Waterworks District 7 | LA1017052 | Keithville | 5,889 | <MRL | <MRL | 0 | No PFAS detected |
| Wbr District 4 -Section Road Winterville | LA1121027 | Port Allen | 5,571 | <MRL | <MRL | 0 | No PFAS detected |
| Wbr Public Utilities | LA1121008 | Port Allen | 4,329 | <MRL | <MRL | 0 | No PFAS detected |
| Wesley Chapel Water System | LA1061020 | Ruston | 4,080 | <MRL | <MRL | 0 | No PFAS detected |
| West Baton Rouge Water Works District 2 | LA1121018 | Port Allen | 13,437 | <MRL | <MRL | 0 | No PFAS detected |
| West Feliciana Consol Wwks District 13 | LA1125010 | St. Francisville | 12,045 | <MRL | <MRL | 0 | No PFAS detected |
| West Grant Water Association | LA1043014 | Alanta | 3,324 | <MRL | <MRL | 0 | No PFAS detected |
| West Vernon Parish Waterworks District | LA1115121 | Anacoco | 4,365 | <MRL | <MRL | 0 | No PFAS detected |
| Westview Water Works | LA1105028 | Amite | 1,134 | <MRL | <MRL | 0 | No PFAS detected |
| Westwego Waterworks | LA1051005 | Westwego | 8,534 | <MRL | <MRL | 0 | No PFAS detected |
| Wwks District 2 Of St Helena | LA1091007 | Greensburg | 8,772 | <MRL | <MRL | 0 | No PFAS detected |
Highest single result for each system; PFOA and PFOS in ppt (ng/L). Entry-point samples, not tap water; screening comparisons, not compliance determinations.