Thurston County · System ID 43500 · Community water system
Is Lacey Water Department’s water safe? PFAS test results (Thurston County, WA)
PFAS detected — below state action levels
Lacey Water Department detected PFAS in 15 of its 24 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 Thurston County · 34,858 connections · about 105,178 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 Lacey Water Department
| Analyte | Highest result | WA action level | Federal MCL | Detected at source |
|---|---|---|---|---|
| PFPeA Perfluoropentanoic acid | 21 ng/L | — | — | Beachcrest AAA942 WW, Beachcrest S15R BCS892, Betti AEC941, Hawks Prairie Well #2 BAM406 24", WF (S16 & S33) Beachcrest |
| PFHxA Perfluorohexanoic acid | 15 ng/L | — | — | Beachcrest AAA942 WW, Beachcrest S15R BCS892, Betti AEC941, Hawks Prairie Well #2 BAM406 24", McAllister AAY302, WF (S16 & S33) Beachcrest |
| PFHxS Perfluorohexanesulfonic acid | 5 ng/L | 65 ng/L | 10 ng/L | Lacey Nisq S01 Well #19A AAA938, Lacey Nisq SO2 Well #19C AAA937 |
| PFBS Perfluorobutanesulfonic acid | 4 ng/L | 345 ng/L | — | Beachcrest AAA942 WW, Beachcrest S15R BCS892, Betti AEC941, College & 32nd AAA936, Golf Club Estates AAA932, Judd Hill AAA940, Madrona 1 ABY233 WW, Madrona 2 ACR769 WW, Madrona 3 AEC883, McAllister AAY302, WF (S16 & S33) Beachcrest, WF (S21 & 22) Madrona |
| PFOA Perfluorooctanoic acid | 4 ng/L | 10 ng/L | 4 ng/L | Beachcrest AAA942 WW, Beachcrest S15R BCS892, Betti AEC941, College & 32nd AAA936, Lacey Nisq S01 Well #19A AAA938, Lacey Nisq SO2 Well #19C AAA937, Madrona 1 ABY233 WW, Madrona 2 ACR769 WW, Madrona 3 AEC883, McAllister AAY302, WF (S16 & S33) Beachcrest, WF (S21 & 22) Madrona |
| PFBA Perfluorobutanoic acid | 3 ng/L | — | — | Betti AEC941, WF (S16 & S33) Beachcrest |
| PFOS Perfluorooctanesulfonic acid | 3 ng/L | 15 ng/L | 4 ng/L | McAllister AAY302 |
What this means
PFAS was detected in 15 of the 24 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: 2026-06-18. 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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