Drinking water / DE
PFAS in Delaware drinking water
36 Delaware public water systems tested under UCMR5. 17 detected at least one PFAS compound; 19 detected none at the reporting thresholds. Values are the highest single result per compound, in ng/L (parts per trillion). The federal limit for PFOA and PFOS is 4 ng/L.
| Water system | Serves | Highest results (ng/L) | Reading |
|---|---|---|---|
| ARTESIAN NORTHERN SUSSEX REGIONAL DE0020003 | Sussex | PFPeA 8.3PFOA 5.7 *PFHxA 5.7PFBS 4.3 | above final limit |
| ARTESIAN WATER COMPANY DE0000552 | New Castle | PFPeA 106PFBA 79.1PFHxA 72.2PFOA 23.1 * | above final limit |
| BETHANY BAY PUMP DISTRICT DE0000221 | Sussex | PFOS 6.1 * | above final limit |
| DEWEY BEACH WATER DEPARTMENT DE0000825 | Sussex | PFOA 11 *PFBS 5PFHxA 4.2PFPeA 3.8 | above final limit |
| GEORGETOWN WATER DEPARTMENT DE0000592 | Sussex | 6:2 FTS 180PFPeA 110PFHxA 68PFHpA 39 | above final limit |
| LEWES BOARD OF PUBLIC WORKS DE0000602 | Sussex | PFOS 9.5 *PFOA 6.1 *PFHxS 3.5 | above final limit |
| NEWARK WATER DEPARTMENT, DE DE0000630 | New Castle | PFOA 25.3 *PFHxA 13.2PFPeA 12.6PFBA 11.2 | above final limit |
| REHOBOTH BEACH WATER DEPARTMENT DE0000723 | Sussex | PFOA 14.9 *PFBS 7.2PFHxS 6.9PFHxA 6.2 | above final limit |
| REHOBOTH PUMP DISTRICT DE0000991 | Sussex | PFPeA 9.4PFHxA 6.6PFBS 5.8PFOA 4.4 * | above final limit |
| SMYRNA WATER DEPARTMENT DE0000657 | Kent | PFOA 9.8 *PFBS 6.9PFOS 6.7 *PFPeA 4.7 | above final limit |
| SOUTH BETHANY DE00A0323 | Sussex | PFOS 4.7 * | above final limit |
| STAGE VILLAGE MHC DE0000569 | Sussex | PFBS 12.7PFOS 8.5 *PFOA 7.6 *PFPeA 4.6 | above final limit |
| SUEZ WATER DELAWARE DE0000564 | New Castle | PFBA 40.6PFPeA 32.1PFHxA 31.7PFHpA 27.7 | above final limit |
| WILMINGTON WATER DEPARTMENT DE0000663 | New Castle | PFPeA 32.2PFHxA 21.1PFBA 14.1PFOA 9.9 * | above final limit |
| BAYSIDE PUMP DISTRICT DE00A0837 | Sussex | PFPeA 13.5PFBA 8PFHxA 3.6 | detected |
| MUNICIPAL SERVICES COMMISSION DE0000634 | New Castle | PFBA 147.2PFPeA 122.9 | detected |
| SEAFORD WATER DEPARTMENT DE0000246 | Sussex | PFPeA 6.1PFHxA 4.8 | detected |
* exceeds the final federal MCL for that compound. Detections of compounds whose limits EPA proposed to rescind in May 2026 are shown for information.
Systems with no PFAS detected
19 tested systems reported no PFAS above the laboratory reporting limits. Each has its own page with its sampling detail.
- BETHANY BEACH WATER DEPARTMENT
- BRIDGEVILLE WATER DEPARTMENT
- CAMDEN PUMP DISTRICT
- CAMDEN WYOMING SEWER AND WATER AUTHORITY
- CHURCH CREEK
- DELMAR UTILITY COMM (TN OF DELMAR)
- DOVER AIR FORCE BASE
- DOVER WATER DEPARTMENT
- EAST NCC DISTRICT
- GARRISON LAKE PUMP DISTRICT
- LAUREL WATER DEPARTMENT
- LONG NECK WATER COMPANY
- MEADOWS PUMP DISTRICT
- MIDDLETOWN WATER DEPARTMENT, DE
- MILFORD WATER DEPARTMENT
- MILLSBORO WATER DEPARTMENT
- NORTH WEST PUMP DISTRICT
- SUSSEX SHORES WATER COMPANY
- SWANN KEYS
A detection at the system level does not tell you what reaches one specific tap: levels vary by entry point, treatment train and plumbing. A certified lab test of your own tap settles it. Testing and treatment options