Is there PFAS in Golden State Wc - West Orange County water?

Yes. EPA's final UCMR 5 results show Golden State Wc - West Orange County averaged 15.2 ppt of PFOS at its worst sampling point, 3.8 times the EPA limit of 4 ppt.

Golden State Wc - West Orange County is a public water system drawing on surface water, based in Anaheim, California, serving about 114,379 people, including Cypress, Stanton, Los Alamitos, Anaheim, Garden Grove. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 24 times across 12 sampling points between Mar 2023 and Jul 2025.

Every PFAS detected

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

Lithium, tested in the same program: highest 34.3 ppb, detected in 3 of 24 samples. EPA's health-based screening level is 10 ppb.

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 California

• Cal-water Service Co.-chico above an EPA limit
• City of Antioch none detected
• Vallecitos WD none detected
• Ventura Water Department 2 PFAS detected
• Downey - City, Water Dept. above an EPA limit
• Great Oaks Wc INC 4 PFAS detected

All 707 tested systems in California

ZIP codes served

90630 90680 90720 92804 92841

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 Golden State Wc - West Orange County water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID CA3010022. https://wellandtap.com/pfas/california/golden-state-wc-west-orange-county/

About this data

Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID CA3010022). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.