Skip to content
TapBuff
ZIP

Is Mesa, WA tap water safe?

2 utilities serve Mesa, 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

1 of the 2 utilities serving Mesa has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: Basin City Water Sewer District.

Basin City Water Sewer District, which serves the most people here, has 1 result above the legal limit and 1 result above the health goal. The worst: Nitrate at 12 ppm, above the legal limit.

The water from Basin City Water Sewer District is hard to very hard depending on the source, 153 to 302 mg/L (8.9 to 17.7 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 Mesa’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 Basin City Water Sewer District’s water, which serves the most people here. Another utility’s report names what handles its own results.

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Every claim, and more filters, in the full report

Water testing near Mesa

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 Mesa, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Matrix Sciences International Inc. dba KTL

    Pasco, WA · about 14 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 14 miles

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

    (509) 792-1951

  • Energy Northwest Environmental Services Lab

    Richland, WA · about 17 miles

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

    (509) 377-8058

All 84 certified labs for Washington

ZIP codes in Mesa

Which ZIP codes are in Mesa: 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 Mesa

Towns nearby with a page of their own.

What to do next