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.
36 of the 286 public water systems listed for Delaware 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 286 Delaware systems, including those not tested · Download all Delaware results (CSV, gzip)
| System | PWSID | City | Population | PFOA (ppt) | PFOS (ppt) | HI | Highest single result |
|---|---|---|---|---|---|---|---|
| Georgetown Water Department | DE0000592 | Georgetown | 7,259 | 36 | 14 | 2.504 | PFOA ≥ 3 × its limit |
| Newark Water Department | DE0000630 | Newark | 40,000 | 25.3 | 7.5 | 0.553 | PFOA ≥ 3 × its limit |
| Veolia Water Delaware, Inc | DE0000564 | Wilmington | 100,495 | 24.4 | <MRL | 1.162 | PFOA ≥ 3 × its limit |
| Artesian Water Company | DE0000552 | Newark | 231,114 | 23.1 | 6 | 0.892 | PFOA ≥ 3 × its limit |
| Rehoboth Beach Water Department | DE0000723 | Rehoboth Beach | 25,000 | 14.9 | 6.2 | 0.692 | PFOA ≥ 3 × its limit |
| Dewey Beach Water Department | DE0000825 | Frankford | 31,000 | 11 | <MRL | 0.352 | PFOA 1–3 × its limit |
| Wilmington Water Department | DE0000663 | Wilmington | 107,976 | 9.9 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Smyrna Water Department | DE0000657 | Smyrna | 11,813 | 9.8 | 6.7 | 0.003 | PFOA 1–3 × its limit |
| Lewes Board Of Public Works | DE0000602 | Lewes | 9,627 | 6.1 | 9.5 | 0.35 | PFOS 1–3 × its limit |
| Stage Village Mhc | DE0000569 | Dagsboro | 93 | 7.6 | 8.5 | 0.006 | PFOS 1–3 × its limit |
| Bethany Bay Pump District | DE0000221 | Dover | 52,684 | <MRL | 6.1 | 0 | PFOS 1–3 × its limit |
| Artesian Northern Sussex Regional | DE0020003 | Newark | 5,511 | 5.7 | <MRL | 0.002 | PFOA 1–3 × its limit |
| Artesian Southern Sussex Regional | DE00A0323 | Newark | 20,145 | <MRL | 4.7 | 0 | PFOS 1–3 × its limit |
| Rehoboth Pump District (Tui) | DE0000991 | Dover | 81,417 | 4.4 | <MRL | 0.003 | PFOA 1–3 × its limit |
| Bayside Pump District (Tui) | DE00A0837 | Dover | 8,400 | <MRL | <MRL | 0 | Other PFAS detected |
| Municipal Services Commission | DE0000634 | New Castle | 5,549 | <MRL | <MRL | 0 | Other PFAS detected |
| Seaford Water Department | DE0000246 | Seaford | 6,699 | <MRL | <MRL | 0 | Other PFAS detected |
| Bethany Beach Water Department | DE0000556 | Bethany Beach | 12,000 | <MRL | <MRL | 0 | No PFAS detected |
| Bridgeville Water Department | DE0000559 | Bridgeville | 6,000 | <MRL | <MRL | 0 | No PFAS detected |
| Camden Pump District | DE0000124 | Dover | 17,208 | <MRL | <MRL | 0 | No PFAS detected |
| Camden Wyoming Sewer And Water Authority | DE0000563 | Camden | 5,000 | <MRL | <MRL | 0 | No PFAS detected |
| Church Creek (Awc) | DE00A0428 | Newark | 9,654 | <MRL | <MRL | 0 | No PFAS detected |
| Delmar Utility Comm (Tn Of Delmar) | DE0000567 | Delmar | 2,027 | <MRL | <MRL | 0 | No PFAS detected |
| Dover Air Force Base | DE0000579 | Dover | 11,000 | <MRL | <MRL | 0 | No PFAS detected |
| Dover Water Department | DE0000571 | Dover | 39,491 | <MRL | <MRL | 0 | No PFAS detected |
| East Ncc District | DE00A0334 | Dover | 5,538 | <MRL | <MRL | 0 | No PFAS detected |
| Garrison Lake Pump District | DE0000004 | Dover | 17,148 | <MRL | <MRL | 0 | No PFAS detected |
| Laurel Water Department | DE0000597 | Laurel | 3,984 | <MRL | <MRL | 0 | No PFAS detected |
| Long Neck Water Company | DE0000625 | Long Neck | 11,000 | <MRL | <MRL | 0 | No PFAS detected |
| Meadows Pump District | DE0000271 | Dover | 14,538 | <MRL | <MRL | 0 | No PFAS detected |
| Middletown Water Department | DE0000614 | Middletown | 17,700 | <MRL | <MRL | 0 | No PFAS detected |
| Milford Water Department | DE0000616 | Milford | 9,800 | <MRL | <MRL | 0 | No PFAS detected |
| Millsboro Water Department | DE0000622 | Millsboro | 8,568 | <MRL | <MRL | 0 | No PFAS detected |
| North West Pump District | DE00A0347 | Dover | 4,149 | <MRL | <MRL | 0 | No PFAS detected |
| Sussex Shores Water Company | DE0000557 | Bethany Beach | 12,450 | <MRL | <MRL | 0 | No PFAS detected |
| Swann Keys | DE0000465 | Salisbury | 1,764 | <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.