Is there PFAS in Arlington Water Dept water?

Yes, at low levels. 1 PFAS was detected, all below EPA's 2024 limits.

Arlington Water Dept is a public water system drawing on surface water, based in Arlington, Washington, serving about 29,508 people. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 10 times across 3 sampling points between Feb 2023 and Dec 2023.

Every PFAS detected

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

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

Levels here are under EPA's limits, so no treatment is required. If you want them lower anyway, a certified reverse osmosis system under the sink handles drinking water, and a whole-house carbon filter also takes out the chlorine or chloramine your utility adds.

Other systems in Washington

• Fife Dept of Public Works 2 PFAS detected
• West Sound Utility District #1 4 PFAS detected
• City of Battle Ground Water Dept none detected
• Cedar River Water & Sewer District 1 PFAS detected
• Centralia Public Works - Water above an EPA limit
• City of Port Angeles none detected

All 248 tested systems in Washington

ZIP codes served

98223

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 Arlington Water Dept water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID WA5302950. https://wellandtap.com/pfas/washington/arlington-water-dept/

About this data

Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID WA5302950). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.