County · Washington
Thurston County, Washington: drinking water records
This overview covers 14 ZIP codes and 199 community water systems in Thurston County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Olympia City of WA5363450 | 126,966 | 355 | 5 | 0 | 3.4 ppb |
| Lacey Water Department WA5343500 | 105,178 | 660 | 4 | 0 | 6 ppb |
| Tumwater City of WA5389700 | 51,802 | 300 | 1 | 0 | 8 ppb |
| Yelm City of WA5399350 | 17,355 | 120 | 0 | 0 | 1.9 ppb |
| Tanglewilde Thompson Place 600 WA5304397 | 7,900 | 60 | 0 | 0 | 2.8 ppb |
| Pattison 500 WA5366578 | 4,643 | 420 | 0 | 0 | 3.1 ppb |
| Tenino City of WA5387400 | 3,336 | 60 | 0 | 0 | 9 ppb |
| Nisqually-Leschi & West Nisqually 105300014 | 3,200 | 0 | 0 | 1 | 2.7 ppb |
| Boston Harbor WA5307850 | 1,153 | 0 | 0 | 4 | 0 ppb |
| Chehalis Tribal Housing 105300027 | 620 | 0 | 0 | 1 | 3.9 ppb |
| Black Lake Bible Camp & Conf Ctr WA5307222 | 477 | 0 | 0 | 1 | 2.8 ppb |
| Cuyamaca 105300089 | 375 | 0 | 0 | 1 | 1.9 ppb |
| Keanland Park 761 WA53AD179 | 268 | 0 | 0 | 1 | 0.8 ppb |
| Tamoshan WA5387140 | 260 | 0 | 0 | 10 | 6.6 ppb |
| Prairie Ridge 605 WA5302356 | 250 | 0 | 0 | 1 | 4 ppb |
| Bronson Beach Club WA5308740 | 225 | 0 | 0 | 1 | 2.1 ppb |
| Wildaire Estates WA5396850 | 146 | 0 | 0 | 10 | 6.5 ppb |
| Country Club Estates 521 WA5315502 | 113 | 0 | 0 | 16 | 6.6 ppb |
| Talcott Ridge 695 WA53AA139 | 102 | 0 | 0 | 2 | 2.6 ppb |
| Heritage West WA5305898 | 70 | 0 | 0 | 1 | 1.9 ppb |
| Quail Run WA5311278 | 66 | 0 | 0 | 1 | 39.8 ppb |
| Parkwood Apartments WA5318160 | 60 | 0 | 0 | 2 | 21.8 ppb |
| Cedar Park WA5311975 | 53 | 0 | 0 | 1 | 0.6 ppb |
| Beverly Beach Homeowners WA5306200 | 50 | 0 | 0 | 1 | 6.7 ppb |
| Richmond Totten WA5372267 | 42 | 0 | 0 | 1 | 62.8 ppb |
ZIP reports in Thurston County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.