County · Washington
San Juan County, Washington: drinking water records
This overview covers 9 ZIP codes and 44 community water systems in San Juan County. It also stands in for 4 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 |
|---|---|---|---|---|---|
| Eastsound Water Users Association WA5322170 | 3,711 | 300 | 0 | 1 | 5.3 ppb |
| Friday Harbor Town of WA5326595 | 3,543 | 120 | 0 | 0 | 1.6 ppb |
| Cape San Juan Water District WA5311065 | 164 | 0 | 0 | 13 | 5.1 ppb |
| Portland Fair Estates WA5369008 | 130 | 0 | 0 | 8 | 0.9 ppb |
| Spring Point Homeowners Association WA5383335 | 85 | 0 | 0 | 21 | 0 ppb |
| Hannah Heights #2 Water Users Assn WA5325264 | 44 | 0 | 0 | 4 | 4.8 ppb |
| San Juan Fairways Owners Assn WA5375765 | 40 | 0 | 0 | 1 | 4.6 ppb |
| Fairway Number Three Water WA5324528 | 39 | 0 | 0 | 10 | 1.2 ppb |
| E.L.C. Water System WA5302051 | 36 | 0 | 0 | 8 | 10.3 ppb |
| Roche Harbor Water System INC WA5373230 | 2,091 | 0 | 0 | 0 | 3.3 ppb |
| Rosario WA5374270 | 1,426 | 0 | 0 | 0 | 4.5 ppb |
| Fisherman Bay Water Association WA5325547 | 1,195 | 0 | 0 | 0 | 0 ppb |
| Doe Bay Water Users Assoc WA5319600 | 442 | 0 | 0 | 0 | 3.3 ppb |
| Olga Water Users INC WA5363400 | 392 | 0 | 0 | 0 | 3.1 ppb |
| Orcas Highlands WA5313301 | 260 | 0 | 0 | 0 | 10.1 ppb |
| West Sound Water Association WA5345014 | 206 | 0 | 0 | 0 | 1.6 ppb |
| Oaks the Mobile Home Park WA5387780 | 143 | 0 | 0 | 0 | 1.1 ppb |
| Mackaye Harbor Water District WA5312911 | 133 | 0 | 0 | 0 | 1.5 ppb |
| North Lopez Service WA5360665 | 114 | 0 | 0 | 0 | 0 ppb |
| Savory Community LLC ID1280166 | 100 | 0 | 0 | 0 | 0 ppb |
| Sun Aire Estates ID1280184 | 98 | 0 | 0 | 0 | 1 ppb |
| Harbor on Fisherman Bay WA5331024 | 84 | 0 | 0 | 0 | 2.1 ppb |
| Limestone Point Water Company INC WA5347280 | 81 | 0 | 0 | 0 | 1.7 ppb |
| Mitchell Point Water Assn WA5355370 | 81 | 0 | 0 | 0 | 5.6 ppb |
| Raccoon Point Water System WA5370670 | 81 | 0 | 0 | 0 | 1.6 ppb |
ZIP reports in San Juan County
No ZIP report in this county is published yet.
These ZIP codes are covered by this overview because their utility has too little EPA data for a separate page: 98222, 98280, 98286, 98297.
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.