County · Minnesota
Washington County, Minnesota: drinking water records
This overview covers 16 ZIP codes and 29 community water systems in Washington County. It also stands in for 6 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 |
|---|---|---|---|---|---|
| Woodbury MN1820025 | 82,643 | 720 | 7 | 0 | 2 ppb |
| Cottage Grove MN1820004 | 42,760 | 300 | 2 | 0 | 2 ppb |
| Oakdale MN1820016 | 30,144 | 240 | 1 | 0 | 2 ppb |
| Stillwater MN1820024 | 19,462 | 450 | 5 | 0 | 2 ppb |
| Hugo MN1820007 | 12,047 | 300 | 1 | 0 | 0 ppb |
| Forest Lake MN1820005 | 11,800 | 120 | 0 | 0 | 2 ppb |
| Lake Elmo MN1820009 | 10,978 | 180 | 3 | 0 | 0 ppb |
| Mahtomedi MN1820013 | 8,818 | 180 | 1 | 0 | 0 ppb |
| Saint Paul Park MN1820018 | 5,427 | 60 | 1 | 0 | 1 ppb |
| Oak Park Heights MN1820020 | 4,776 | 120 | 5 | 0 | 0 ppb |
| Newport MN1820014 | 4,000 | 120 | 4 | 0 | 2 ppb |
| Lakeland Municipal Water MN1820029 | 3,500 | 120 | 1 | 0 | 2 ppb |
| Bayport MN1820001 | 2,700 | 0 | 0 | 0 | 0 ppb |
| Cimarron Park MN1820010 | 2,400 | 0 | 0 | 0 | 0 ppb |
| Birchwood MN1820003 | 864 | 0 | 0 | 0 | 2 ppb |
| Mn Correctional Facility - Stillwater MN1820002 | 781 | 0 | 0 | 0 | 0 ppb |
| Willernie MN1820022 | 525 | 0 | 0 | 0 | 0 ppb |
| Woodlund Mobile Home Park MN1820006 | 330 | 0 | 0 | 0 | 0 ppb |
| Hugo Estates MN1820008 | 300 | 0 | 0 | 0 | 2 ppb |
| Indian Hills Development MN1820028 | 156 | 0 | 0 | 0 | 3 ppb |
| Eagle'S Watch Development MN1820034 | 140 | 0 | 0 | 0 | 0 ppb |
| Jackson Meadow MN1820035 | 95 | 0 | 0 | 0 | 0 ppb |
| Bay Lake Reserve Development MN1820036 | 80 | 0 | 0 | 0 | 0 ppb |
| Wyldewood Acres MN1820038 | 70 | 0 | 0 | 0 | 2 ppb |
| Oakhill Cottages MN1820030 | 65 | 0 | 0 | 0 | 0 ppb |
ZIP reports in Washington 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: 55001, 55003, 55038, 55047, 55073, 55090.
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.