County · Minnesota
St. Louis County, Minnesota: drinking water records
This overview covers 42 ZIP codes and 30 community water systems in St. Louis County. It also stands in for 21 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 |
|---|---|---|---|---|---|
| Duluth MN1690011 | 86,859 | 120 | 0 | 1 | 8 ppb |
| Eveleth MN1690018 | 3,770 | 120 | 1 | 3 | 3 ppb |
| Ely MN1690014 | 3,258 | 120 | 0 | 3 | 5 ppb |
| Hibbing MN1690022 | 16,028 | 120 | 0 | 0 | 32 ppb |
| Virginia MN1690046 | 8,361 | 120 | 0 | 0 | 0 ppb |
| Hermantown MN1690043 | 7,215 | 120 | 0 | 0 | 0 ppb |
| Chisholm MN1690007 | 4,940 | 120 | 0 | 0 | 4 ppb |
| Biwabik MN1690004 | 975 | 0 | 0 | 2 | 0 ppb |
| Floodwood MN1690048 | 501 | 60 | 0 | 0 | 0 ppb |
| Meadowlands MN1690034 | 135 | 0 | 0 | 1 | 0 ppb |
| Proctor MN1690042 | 3,099 | 0 | 0 | 0 | 2 ppb |
| Mountain Iron MN1690035 | 2,880 | 0 | 0 | 0 | 0 ppb |
| Hoyt Lakes MN1690028 | 2,020 | 0 | 0 | 0 | 0 ppb |
| Gilbert MN1690020 | 1,829 | 0 | 0 | 0 | 0 ppb |
| Aurora MN1690002 | 1,764 | 0 | 0 | 0 | 0 ppb |
| White Township MN1690001 | 1,559 | 0 | 0 | 0 | 0 ppb |
| Babbitt MN1690003 | 1,379 | 0 | 0 | 0 | 0 ppb |
| Rice Lake MN1690049 | 1,085 | 0 | 0 | 0 | 0 ppb |
| Buhl MN1690006 | 1,000 | 0 | 0 | 0 | 0 ppb |
| Cook MN1690009 | 574 | 0 | 0 | 0 | 0 ppb |
| Fayal Township MN1690058 | 565 | 0 | 0 | 0 | 0 ppb |
| Breitung MN1690045 | 446 | 0 | 0 | 0 | 3 ppb |
| Tower MN1690051 | 426 | 0 | 0 | 0 | 0 ppb |
| Orr MN1690038 | 249 | 0 | 0 | 0 | 2 ppb |
| Winton MN1690057 | 173 | 0 | 0 | 0 | 3 ppb |
ZIP reports in St. Louis 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: 55602, 55702, 55703, 55705, 55710, 55713, 55717, 55724, 55725, 55732, 55738, 55741, 55750, 55751, 55758, 55763, 55768, 55779, 55803, 55810, 55814.
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.