PFAS in Artondale Water System

WA · Small system · EPA system ID WA5303160 · tested 2023–2025

Is the water here over the federal PFAS limit?

Yes — 3 of them were. The highest, PFOS, came back at 38× the federal MCL.

That doesn't mean the water is unsafe to drink today — these limits are set for a lifetime of exposure, and your utility has until 2029 to comply. But it does mean this is worth acting on, and effective point-of-use treatment is available at a range of prices.

What to do about it

Fit a reverse-osmosis filter on the tap you drink from. A properly maintained reverse-osmosis system can substantially reduce the PFAS detected here, including the short-chain compounds that activated carbon removes less consistently. Look for NSF/ANSI 53 or 58 certification. A standard carbon pitcher should not be relied on for these unless the specific product has independent PFAS test data.

Important for this system: short-chain PFAS were detected here. These tend to break through activated carbon sooner than longer-chain compounds, so a carbon pitcher should not be assumed to reduce them reliably without product-specific test data — reverse osmosis or anion exchange is the more dependable option.

We sell nothing and take no affiliate commission — see how the filter types compare.

The full results

Every PFAS the EPA found here, highest first. ng/L is nanograms per litre — roughly one drop in an Olympic pool.

CompoundLevel foundFederal MCLStatusOur verdict
PFOS153.6 ng/L4 ng/L38× the MCLReal — regulated, and it lingers
PFHxS55.8 ng/L10 ng/L5.6× the MCLReal — regulated as a mixture
PFBS28.9 ng/LNo federal MCLno federal limit
PFPeS19.4 ng/LNo federal MCLno federal limit
PFHxA16.9 ng/LNo federal MCLno federal limitShort-chain, ubiquitous, unregulated
PFPeA13.9 ng/LNo federal MCLno federal limitEverywhere in your water — and nobody regulates it
PFOA6.3 ng/L4 ng/L1.6× the MCLReal, newly regulated
PFHpA5.6 ng/LNo federal MCLno federal limit

How to read the verdict: we grade every compound on how worried to actually be — Real (act on it), Depends (on your situation), Complicated (a genuine trade-off or still contested), Mild (mostly overblown). A dash means we haven't reviewed it yet — not that it's safe. Every compound links to its full, cited page.

Source: US EPA, Fifth Unregulated Contaminant Monitoring Rule (UCMR 5) occurrence data, 2023–2025. Levels are the highest value reported at this system. Verdicts are Embr's own calibrated judgment — see our methodology. This is not medical advice.

Part of PFAS in US Tap Water — the national picture.

What’s being done about it

Regulatory status as of July 2026

Yes — there is a federal response, and it is actively changing. In 2024 the EPA set the first nationwide, enforceable drinking-water limits for PFAS: 4 parts per trillion each for PFOA and PFOS, plus limits for PFHxS, PFNA and GenX (HFPO-DA). Public water systems must monitor for these and, where they are exceeded, reduce them.

The limit exceeded here for PFOA, PFOS is the firm part of the rule: the EPA reaffirmed the PFOA and PFOS limits in July 2026 and separately proposed giving systems until 2031 to come into compliance.

The limit exceeded here for PFHxS is unsettled: as of July 2026 the EPA has proposed to rescind the federal limits for PFHxS, PFNA and GenX and reconsider how they are regulated, with a final rule expected in 2026. Treat this exceedance as a health-relevant signal, not a settled legal violation.

What that means for you: your utility is required to test for these PFAS and report results in its annual Consumer Confidence Report, and the federal picture is moving month to month — which is exactly what we track.

No specific federal enforcement action for this system was found in our sources as of July 2026. That is not evidence none exists — it means none is recorded in the datasets we join.

Federal-rule status is summarized from the EPA Safe Drinking Water Act PFAS pages and is re-verified as the rule changes. This is regulatory context, not legal or medical advice.