Is there PFAS in Artesian Water Company water?

Yes. EPA's final UCMR 5 results show Artesian Water Company averaged 22.2 ppt of PFOA at its worst sampling point, 5.5 times the EPA limit of 4 ppt.

Artesian Water Company is a public water system drawing on surface water, Delaware, serving about 231,114 people, including Bear, Newark, Hockessin, New Castle, Wilmington. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 45 times across 22 sampling points between May 2024 and Feb 2025.

Every PFAS detected

Not detected: HFPO-DA, ADONA, 9Cl-PF3ONS, PFUnA, PFDA, PFNA, 11Cl-PF3OUdS, PFPeS, NFDHA, PFHpS, NMeFOSAA, PFTrDA, PFTA, 6:2 FTS, PFDoA, NEtFOSAA, PFEESA, PFMBA, PFMPA, 8:2 FTS, 4:2 FTS.

Lithium, tested in the same program: not detected.

What the EPA limits mean here

In April 2024 EPA set enforceable limits of 4 ppt for PFOA and PFOS, 10 ppt each for PFHxS, PFNA and GenX, and a hazard index of 1 for mixtures. Utilities were given until 2029 to comply. In May 2026 EPA proposed keeping only the PFOA and PFOS limits and moving that deadline to 2031. Until that proposal is final, the 2024 limits stand.

Compliance is judged on a running annual average at each entry point, so we show the average at this system's worst sampling point next to its single highest result. UCMR 5 results do not by themselves put a utility in or out of compliance.

What you can do at home

Two routes work for PFAS. For drinking and cooking water only, a reverse osmosis system certified to NSF/ANSI 58 with a PFOA/PFOS reduction claim is the cheapest proven option. To treat every tap and shower, a whole-house carbon system with enough contact time works, but check that the maker has PFAS test data, not just a marketing claim. See the best filters for PFAS and how PFAS removal works.

Other systems in Delaware

• Wilmington Water Department above an EPA limit
• Suez Water Delaware above an EPA limit
• Rehoboth Pump District 4 PFAS detected
• Bethany Bay Pump District above an EPA limit
• Newark Water Department above an EPA limit
• Dover Water Department none detected

All 36 tested systems in Delaware

ZIP codes served

19701 19702 19707 19711 19713 19720 19804 19805

As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.

Cite this page

Well & Tap. "PFAS in Artesian Water Company water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID DE0000552. https://wellandtap.com/pfas/delaware/artesian-water-company/

About this data

Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID DE0000552). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.