County · Washington
Island County, Washington: drinking water records
This overview covers 8 ZIP codes and 233 community water systems in Island 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 |
|---|---|---|---|---|---|
| Oak Harbor City of WA5362650 | 23,675 | 120 | 0 | 0 | 1.2 ppb |
| Naval Air Station/Whidbey Island WA5303420 | 16,595 | 120 | 0 | 0 | 3.4 ppb |
| Coupeville Town of WA5315550 | 4,142 | 60 | 7 | 0 | 3.5 ppb |
| Langley City of WA5345950 | 1,416 | 0 | 0 | 1 | 1.9 ppb |
| Scatchet Head Water District WA5376470 | 900 | 0 | 0 | 1 | 1.1 ppb |
| Rolling Hills-Glencairn WA5374000 | 872 | 0 | 0 | 8 | 2.1 ppb |
| Lost Lake Property Owners Assn WA5348345 | 736 | 60 | 0 | 0 | 2.4 ppb |
| Vistaire Water System WA5357414 | 647 | 0 | 0 | 1 | 3.3 ppb |
| Saratoga Water District WA5376300 | 477 | 0 | 0 | 10 | 1.1 ppb |
| Penn Cove Water and Sewer District WA5366950 | 460 | 0 | 0 | 19 | 1.7 ppb |
| Whidbey West Water Assoc. WA5336314 | 415 | 0 | 0 | 11 | 2.2 ppb |
| Sierra Country Club WA5378975 | 400 | 0 | 0 | 9 | 1.5 ppb |
| Goss Lake Park Community WA5328575 | 285 | 0 | 0 | 3 | 4.8 ppb |
| Shirona Water System WA5378373 | 243 | 0 | 0 | 1 | 5.5 ppb |
| Hide-Away Water Company INC WA5366586 | 240 | 0 | 0 | 3 | 2.5 ppb |
| Driftwood Shores Water System INC WA5320000 | 222 | 0 | 0 | 1 | 0.9 ppb |
| Harris Custer Estates Water Assn WA5317035 | 194 | 0 | 0 | 1 | 0.9 ppb |
| Long Point Water Company INC WA5348050 | 182 | 0 | 0 | 1 | 1 ppb |
| Pine Terrace Water Association WA5367600 | 181 | 0 | 0 | 1 | 0.8 ppb |
| Arrowhead Beach Coop Water Assoc WA5303000 | 167 | 0 | 0 | 18 | 2.1 ppb |
| Parklane Water Association WA5366204 | 127 | 0 | 0 | 1 | 0.8 ppb |
| Campo Hacienda WA5310992 | 123 | 0 | 0 | 2 | 2.5 ppb |
| Sunset Development Comm Club WA5386075 | 92 | 0 | 0 | 1 | 48.9 ppb |
| Beachwood Water Company WA5304980 | 90 | 0 | 0 | 9 | 1.1 ppb |
| Deer Lake Haven INC WA5318450 | 90 | 0 | 0 | 2 | 2.9 ppb |
ZIP reports in Island 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.