Is West Richland, WA tap water safe?
The short answer
None of the 3 utilities serving West Richland has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records.
City of West Richland, which serves the most people here, has 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 31.9 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from City of West Richland is soft to very hard depending on the source, 12 to 237 mg/L (0.7 to 13.9 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 West Richland’s ZIP codes, from EPA’s estimates.
- Open report
City of West Richland
Washington · serves 21,231 people · about 10,200 in West Richland
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 31.9 ppb, above EPA’s health benchmark. Hardness: soft to very hard depending on the source, 12 to 237 mg/L (0.7 to 13.9 grains per gallon).
No health-based violations since 2016
- Open report
Benton City Water
Washington · serves 5,626 people · about 140 in West Richland
1 result above EPA’s new limit, which takes effect in 2029, 2 results above the health goal and 1 result above EPA’s health benchmark. The worst: PFOS at 8.7 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: very hard, typically 285 mg/L (16.7 grains per gallon).
No health-based violations since 2016
- Open report
Oasis Water Corporation
Washington · serves 556 people · about 110 in West Richland
1 result above the health goal. The worst: Arsenic at 3.5 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in City of West Richland’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
Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic
Water testing near West Richland
The 3 labs Washington certifies closest to West Richland, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Energy Northwest Environmental Services Lab
Richland, WA · about 7 miles
Certified for nitrate, lead and copper, metals, minerals and other inorganics
Energy NW Environmental (PPL) Lab
Richland, WA · about 8 miles
Certified for bacteria
Benton-Franklin Health District Lab
Kennewick, WA · about 14 miles
Certified for bacteria, nitrate, minerals and other inorganics
Which ZIP codes are in West Richland: 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 West Richland
Towns nearby with a page of their own.
What to do next
- Read City of West Richland’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water