EPA UCMR 5 results for 36 public water systems. 17 had at least one PFAS detected; 14 had a highest single PFOA or PFOS result above 4.0 ppt.
UCMR 5 is a one-time EPA monitoring program, not a compliance determination. The values shown are the highest single sample result at any of the system's sampling points; one result above 4.0 ppt does not mean the system violates the PFAS rule, which is judged on running annual averages under separate compliance monitoring. Results describe the public water system, not an individual home.
| Water system | Serves | PFOA max (ppt) | PFOS max (ppt) | PFAS detected |
|---|---|---|---|---|
| Artesian Northern Sussex Regional DE0020003 | Lewes | 5.7 | ND | 4 |
| Artesian Water Company DE0000552 | Bear, Hockessin | 23.1 | 6 | 8 |
| Bayside Pump District DE00A0837 | Fenwick Island | ND | ND | 3 |
| Bethany Bay Pump District DE0000221 | Millville | ND | 6.1 | 1 |
| Bethany Beach Water Department DE0000556 | Bethany Beach | ND | ND | 0 |
| Bridgeville Water Department DE0000559 | Bridgeville | ND | ND | 0 |
| Camden Pump District DE0000124 | Camden-Wyoming | ND | ND | 0 |
| Camden Wyoming Sewer and Water Authority DE0000563 | Camden-Wyoming | ND | ND | 0 |
| Church Creek DE00A0428 | Magnolia | ND | ND | 0 |
| Delmar Utility Comm (TN of Delmar) DE0000567 | Delmar | ND | ND | 0 |
| Dewey Beach Water Department DE0000825 | Dewey Beach | 11 | ND | 5 |
| Dover Air Force Base DE0000579 | Dover Afb | ND | ND | 0 |
| Dover Water Department DE0000571 | Dover | ND | ND | 0 |
| East NCC District DE00A0334 | Odessa | ND | ND | 0 |
| Garrison Lake Pump District DE0000004 | Smyrna | ND | ND | 0 |
| Georgetown Water Department DE0000592 | Georgetown | 36 | 14 | 11 |
| Laurel Water Department DE0000597 | Laurel | ND | ND | 0 |
| Lewes Board of Public Works DE0000602 | Lewes | 6.1 | 9.5 | 3 |
| Long Neck Water Company DE0000625 | Millsboro | ND | ND | 0 |
| Meadows Pump District DE0000271 | Millsboro | ND | ND | 0 |
| Middletown Water Department, De DE0000614 | Middletown | ND | ND | 0 |
| Milford Water Department DE0000616 | Milford | ND | ND | 0 |
| Millsboro Water Department DE0000622 | Millsboro | ND | ND | 0 |
| Municipal Services Commission DE0000634 | New Castle | ND | ND | 2 |
| Newark Water Department, De DE0000630 | Newark | 25.3 | 7.5 | 8 |
| North West Pump District DE00A0347 | Middletown | ND | ND | 0 |
| Rehoboth Beach Water Department DE0000723 | Rehoboth Beach | 14.9 | 6.2 | 7 |
| Rehoboth Pump District DE0000991 | Rehoboth Beach | 4.4 | ND | 4 |
| Seaford Water Department DE0000246 | Seaford | ND | ND | 2 |
| Smyrna Water Department DE0000657 | Smyrna | 9.8 | 6.7 | 5 |
| South Bethany DE00A0323 | Bethany Beach | ND | 4.7 | 1 |
| Stage Village MHC DE0000569 | Delmar | 7.6 | 8.5 | 5 |
| Suez Water Delaware DE0000564 | New Castle, Wilmington | 24.4 | ND | 9 |
| Sussex Shores Water Company DE0000557 | Bethany Beach | ND | ND | 0 |
| Swann Keys DE0000465 | Fenwick Island | ND | ND | 0 |
| Wilmington Water Department DE0000663 | Wilmington | 9.9 | ND | 6 |
ND = not detected (below the 4 ppt UCMR 5 reporting level). Values are the highest single sample result, not an annual average.