Is Roslyn, WA tap water safe?
The short answer
1 of the 2 utilities serving Roslyn has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: Mountain Ridge.
City of Roslyn, which serves the most people here, has nothing above a health goal in EPA’s and Washington’s records. That data covers what its report lists, not everything.
The water from City of Roslyn is soft, 35 mg/L (2.1 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 Roslyn’s ZIP codes, from EPA’s estimates.
- Open report
City of Roslyn
Washington · serves 2,099 people · about 670 in Roslyn
Nothing in its records is above a health goal. Hardness: soft, 35 mg/L (2.1 grains per gallon).
No health-based violations since 2016
- Open report
Mountain Ridge
Washington · serves 28 people · based in Roslyn
1 result above the legal limit and 2 results above the health goal. The worst: Total trihalomethanes (TTHM) at 220 ppb, above the legal limit. Hardness: soft, 11 mg/L (0.6 grains per gallon).
1 health-based violation since 2016
Water testing near Roslyn
The 3 labs Washington certifies closest to Roslyn, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Anatek Labs, Inc - Wenatchee
Wenatchee, WA · about 37 miles
Certified for bacteria
Aqua Test, Incorporated
Maple Valley, WA · about 40 miles
Certified for bacteria, nitrate
Anatek Labs, Inc. - Yakima
Yakima, WA · about 52 miles
Certified for bacteria, nitrate, minerals and other inorganics
Which ZIP codes are in Roslyn: 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 Roslyn
Other towns in Kittitas County with a page of their own.
What to do next
- Read City of Roslyn’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Decide if you want a filter at allA filter for taste or chlorine is a preference, not a need. The standards say what each kind can do.NSF/ANSI standards, decoded
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water