Is Olympia, WA tap water safe?
The short answer
4 of the 15 utilities serving Olympia have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Washington’s records: Boston Harbor, Keanland Park 761, Tamoshan and 1 more.
City of Olympia, which serves the most people here, has 2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 5.8 ppt, above EPA’s new limit, which takes effect in 2029.
The water from City of Olympia is soft, typically 52 mg/L (3 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 Olympia’s ZIP codes, from EPA’s estimates.
- Open report
City of Olympia
Washington · serves 126,966 people · about 10,600 in Olympia
2 results above EPA’s new limit, which takes effect in 2029 and 2 results above the health goal. The worst: PFOS at 5.8 ppt, above EPA’s new limit, which takes effect in 2029. Hardness: soft, typically 52 mg/L (3 grains per gallon).
No health-based violations since 2016
- Open report
City of Tumwater
Washington · serves 51,924 people · about 2,600 in Olympia
1 result above the health goal. The worst: Lead at 8.0 ppb, above the health goal. Hardness: soft, 57 mg/L (3.3 grains per gallon).
No health-based violations since 2016
- Open report
Countrywood Estates 680
Washington · serves 488 people · about 160 in Olympia
2 results above the health goal. The worst: Arsenic at 2.2 ppb, above the health goal. Hardness: soft, 42 mg/L (2.5 grains per gallon).
No health-based violations since 2016
- Open report
Boston Harbor
Washington · serves 1,153 people · about 120 in Olympia
2 results above the legal limit and 1 result above the health goal. The worst: Total trihalomethanes (TTHM) at 70.9 ppb, above the legal limit. Hardness: soft, typically 57 mg/L (3.3 grains per gallon).
5 health-based violations since 2016
- Open report
Carlyon Beach Homeowners
Washington · serves 1,273 people · about 110 in Olympia
1 result above the health goal. The worst: Lead at 2.3 ppb, above the health goal. Hardness: soft, typically 53 mg/L (3.1 grains per gallon).
No health-based violations since 2016
- Open report
Keanland Park 761
Washington · serves 268 people · about 100 in Olympia
2 results above the health goal. The worst: Arsenic at 2.0 ppb, above the health goal.
1 health-based violation since 2016
- Open report
Cedar Ridge 617
Washington · serves 186 people · under 100 in Olympia
2 results above the health goal. The worst: Arsenic at 3.4 ppb, above the health goal.
No health-based violations since 2016
- Open report
Cedar Shores 677
Washington · serves 90 people · under 100 in Olympia
Nothing in its records is above a health goal. Hardness: moderately hard, 64 mg/L (3.7 grains per gallon).
No health-based violations since 2016
- Open report
Libby Road East
Washington · serves 85 people · under 100 in Olympia
2 results above the health goal. The worst: Lead at 4.3 ppb, above the health goal. Hardness: hard, 150 mg/L (8.8 grains per gallon).
No health-based violations since 2016
- Open report
Lews 81st 225
Washington · serves 92 people · under 100 in Olympia
1 result above the health goal. The worst: Arsenic at 1.9 ppb, above the health goal. Hardness: moderately hard, 74 mg/L (4.3 grains per gallon).
No health-based violations since 2016
5 more utilities in Olympia
By EPA’s estimate, each serves fewer people in Olympia than those above.
- River Parkserves 277 people · under 100 in Olympia · no health-based violations since 2016
- Tamoshanserves 260 people · under 100 in Olympia · 10 health-based violations since 2016
- Woodard Placeserves 94 people · under 100 in Olympia · no health-based violations since 2016
- North Offut Lake WTR Serviceserves 97 people · under 100 in Olympia · no health-based violations since 2016
- Salt Aire Mobile Terraceserves 23 people · under 100 in Olympia · 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 Olympia’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: PFOS, PFOA, Lead, 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: PFOS, PFOA, Lead, 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: PFOS, PFOA, Lead, Arsenic
Water testing near Olympia
The 3 labs Washington certifies closest to Olympia, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Thurston County Health Department Laboratory
Olympia, WA · about 4 miles
Certified for bacteria, nitrate
Olympic Analytical LLC dba Vanguard Laboratory
Olympia, WA · about 5 miles
Certified for bacteria, nitrate
Water Management Laboratories, Inc.
Tacoma, WA · about 26 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, radioactivity
Which ZIP codes are in Olympia: 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 Olympia
Other towns in Thurston County with a page of their own.
What to do next
- Read City of Olympia’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for PFOSRanked by certification and what they cost over five years.The best water filters for PFAS, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water