Lewis County · System ID 12200 · Community water system
Is Centralia Public Works - Water’s water safe? PFAS test results (Lewis County, WA)
PFAS detected — below state action levels
Centralia Public Works - Water detected PFAS in 5 of its 5 tested water sources; every result in the current state dataset (2021–present) is below Washington’s state action levels (latest test June 2026).
Community water system serving Lewis County · 8,607 connections · about 28,164 people.
At least one individual sample measured at or above a federal MCL value (4 ng/L for PFOA/PFOS; 10 ng/L for PFHxS, PFNA, HFPO-DA). Compliance with the federal standard is judged on running annual averages at the tap — a single source sample at that level is a flag, not a violation.
PFAS results on record for Centralia Public Works - Water
| Analyte | Highest result | WA action level | Federal MCL | Detected at source |
|---|---|---|---|---|
| PFOS Perfluorooctanesulfonic acid | 6 ng/L | 15 ng/L | 4 ng/L | K Street AFC723, Port District WF (S04,14,15), Tennis Court WF (S012 & 13), Tennis Court Well #1 AFC725 WW, Tennis Court Well #2 AFC726 WW |
| PFBS Perfluorobutanesulfonic acid | 4 ng/L | 345 ng/L | — | K Street AFC723, Port District WF (S04,14,15), Tennis Court WF (S012 & 13), Tennis Court Well #1 AFC725 WW, Tennis Court Well #2 AFC726 WW |
| PFOA Perfluorooctanoic acid | 3 ng/L | 10 ng/L | 4 ng/L | Port District WF (S04,14,15) |
| PFHxA Perfluorohexanoic acid | 2 ng/L | — | — | Port District WF (S04,14,15) |
| PFHxS Perfluorohexanesulfonic acid | 2 ng/L | 65 ng/L | 10 ng/L | Tennis Court WF (S012 & 13) |
What this means
PFAS was detected in 5 of the 5 sources tested for this system, and every result in the current state dataset (2021–present) is below Washington’s state action levels — the thresholds at which the state requires customer notification and action. Detected-but-below-action-level is exactly what it sounds like: PFAS is present in at least one source at low levels, and the state does not currently require the utility to act on it.
If you’d rather not drink detectable PFAS at any level, the at-the-tap option we plan to offer is under-sink reverse osmosis — manufacturer test data shows RO membranes reduce PFAS. See the planned systems.
These results describe the water system’s sources (wells, intakes), not any individual tap — utilities blend, treat, and rotate sources. Data: Washington State Department of Health public PFAS results and Drinking Water Service Areas, dataset updated 2026-07-22. Latest test on record for this system: 2026-06-09. Informational only — not a certification of water quality and not health advice. If you have concerns about your drinking water, contact your utility or the WA DOH Office of Drinking Water.
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