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Is Walla Walla, WA tap water safe?

10 utilities serve Walla Walla, by EPA’s records. Here is what EPA’s and Washington’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

2 of the 10 utilities serving Walla Walla have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: Walla Walla Water Division and Prospect Heights Comm Water Assn.

Walla Walla Water Division, which serves the most people here, has 1 result above the health goal. The worst: Lead at 4.4 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.

The water from Walla Walla Water Division is soft to moderately hard depending on the source, 28 to 70 mg/L (1.6 to 4.1 grains per gallon). How Washington’s water compares.

A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Walla Walla’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Walla Walla Water Division’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Walla Walla

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Washington certifies.

The 3 labs Washington certifies closest to Walla Walla, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Walla Walla Regional Water Testing Services

    College Place, WA · about 5 miles

    Certified for bacteria, nitrate

    (509) 526-9287

  • Matrix Sciences International Inc. dba KTL

    Pasco, WA · about 36 miles

    Certified for nitrate, lead and copper, metals, minerals and other inorganics

    (509) 547-3838

  • RJ Lee Group, Inc. Columbia Basin Analytical Laboratories

    Pasco, WA · about 36 miles

    Certified for nitrate, lead and copper, metals, minerals and other inorganics

    (509) 792-1951

All 84 certified labs for Washington

ZIP codes in Walla Walla

Which ZIP codes are in Walla Walla: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Washington State Department of Ecology, Lab Accreditation Program, environmental laboratories accredited for drinking water analyses; distances from the Census 2020 ZIP code tabulation area gazetteer.

Near Walla Walla

Towns nearby with a page of their own.

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