Renton, WA Water Quality (ZIP 98058)

Quick Answers

Is ZIP 98058 tap water safe to drink? PFAS compounds have been detected in 98058's water at an average of 7.6 ppt across 2 compounds. A certified pitcher filter or reverse osmosis system is recommended, especially for sensitive populations.

What filter should I use in 98058? A reverse osmosis system (NSF/ANSI 58) removes 90%+ of PFAS, lead, and arsenic. For smaller households, a pitcher certified to NSF-53 for PFAS (ZeroWater, PUR PLUS) works. Standard Brita cartridges are not certified for PFAS.

ZIP 98058 Water Quality Summary

EPA testing has detected PFAS "forever chemicals" in the water systems serving ZIP 98058 (Renton, WA). Monitoring found a peak of 12.2 ppt across 2 systems, averaging 7.6 ppt over 2 detected compounds. These levels come from individual EPA UCMR 5 water samples (2023-2025). The EPA's 4 ppt limit for PFOA and PFOS is enforced on a running annual average, so a sample above it shows real exposure but is not by itself a violation.

Contamination Level: LOW – Low contamination – PFAS detected but at lower levels; monitoring continues.

Top Detected Compounds in ZIP 98058

• PFBA: 12.2 ppt (exceeds the EPA 4 ppt limit)
• PFBS: 3 ppt

Lead in ZIP 98058 Water

EPA Lead and Copper Rule testing recorded 14 lead samples for the systems serving 98058, with a 90th-percentile high of 0.0029 mg/L (within the EPA 0.015 mg/L action level). There is no safe level of lead for children; homes built before 1986 should use a certified NSF/ANSI 53 lead filter.

About the Data

Source: EPA UCMR5 monitoring (2023-2025), Lead and Copper Rule samples, and SDWIS violation records tied to the water system that serves 98058 in Renton, WA.

Beyond water: other exposures in Renton, WA

Drinking water is one exposure route. These are the other federal datasets that cover ZIP 98058 and King County, WA.

Radon risk in King County, WA

The EPA places King County, WA in Zone 3 - the EPA's lowest-risk category, with a predicted average indoor radon level below 2 pCi/L. Zone maps predict the radon potential of an area from geology and existing indoor readings - they do not describe any individual home. Radon is the leading cause of lung cancer among people who have never smoked, and the only way to know your own level is a test kit.

Lead paint risk in King County, WA

Census figures show 47% of homes in King County, WA were built before 1980, and 16% before 1950. Lead-based paint was banned for residential use in 1978, so older housing stock is the strongest available proxy for lead-paint exposure. This is a statistic about the county's housing, not a test of any particular property - if your home predates 1980, a lead swab test is the way to check.

Air quality in King County, WA

Modelled annual fine-particle pollution (PM2.5) for King County, WA averages 9 µg/m³, within the EPA's annual PM2.5 standard of 9 µg/m³. PM2.5 is the pollution fraction small enough to reach deep into the lungs. These are CDC modelled estimates for the county as a whole, not a reading taken at this ZIP code.

Superfund sites near 98058

There are 2 EPA Superfund (National Priorities List) sites within about five miles of 98058: Queen City Farms (about 3.9 miles); Pacific Car & Foundry Co. (about 4.6 miles). Distances are measured from the ZIP code's geographic centre, so the distance from a specific address will differ. Proximity to a listed site is a fact about location - it is not itself evidence of exposure.