No PFAS were detected in any of the 18 samples EPA's program collected.
Mcwa is a public water system drawing on surface water, based in Rochester, New York, serving about 525,262 people, including Akron, Batavia, Corfu, Darien Center, East Bethany, East Pembroke. Under EPA's Fifth Unregulated Contaminant Monitoring Rule it was tested for 29 PFAS and lithium 18 times across 5 sampling points between Nov 2023 and Aug 2024.
None of the 29 PFAS were found at or above EPA's minimum reporting levels (2 to 20 ppt depending on the compound).
Not detected: PFTA, PFDoA, PFHxA, PFUnA, 11Cl-PF3OUdS, 9Cl-PF3ONS, ADONA, PFOA, PFBA, PFOS, 6:2 FTS, NFDHA, 4:2 FTS, PFEESA, NMeFOSAA, NEtFOSAA, PFTrDA, HFPO-DA, PFPeA, PFHpS, PFHxS, PFHpA, PFPeS, PFBS, PFMBA, PFMPA, 8:2 FTS, PFDA, PFNA.
Lithium, tested in the same program: highest 12.1 ppb, detected in 1 of 18 samples. EPA's health-based screening level is 10 ppb.
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.
No PFAS action is needed on these results. If your water tastes or smells of chlorine, a whole-house city water filter is the usual fix.
All 334 tested systems in New York
14001 14020 14021 14036 14040 14054 14056 14058 14143 14416 14420 14422 14423 14428 14430 14445 14450 14464 14466 14467 14468 14469 14470 14471 14472 14476 14477 14482 14485 14487 14502 14506 14508 14511 14514 14515 14519 14525 14526 14534 14543 14546 14557 14559 14564 14580 14585 14586 14591 14602 14603 14604 14605 14606 14607 14608 14609 14610 14611 14612 14613 14614 14615 14616 14617 14618 14620 14621 14622 14623 14624 14625 14626 14653 14692
As reported by the utility to EPA. Neighbouring ZIPs are often split between systems; your water bill names yours.
Well & Tap. "PFAS in Mcwa water: EPA UCMR 5 results." Data: U.S. EPA Fifth Unregulated Contaminant Monitoring Rule, final release August 2026, PWSID NY2701047. https://wellandtap.com/pfas/new-york/mcwa/
Source: U.S. EPA, UCMR 5 occurrence data, final release August 2026 (PWSID NY2701047). Population: EPA SDWIS. Averages count results below the reporting level as zero, the same convention EPA uses for running annual averages. Full method.
