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Counties → Minnesota

St. Louis County, Minnesota

SDWIS compliance plate

Sheet MN137 · St. Louis County 364 sys · 3,967 viol · #368/3254

VIOL-HIGH · HEALTH-HIGH · RANK-TOP · PHOTO-FINISH · PFAS-LOW · SRC-GW · SYS-LARGE · BOOK-FULL

  • VIOL-HIGH 50.5% flagged
  • HEALTH-HIGH 59.9% health
  • RANK-TOP #368/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-LOW 11.1% detect
  • SRC-GW GW lead 91%
  • SYS-LARGE 364 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Olmsted County (+ 0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, St. Louis County ranks #368 of 3,254 counties by people served, and #6 of 87 counties in Minnesota. See methodology · corpus placement.

St. Louis County standing, lower-flagged corpus third

Flagged-system rate 50.5% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 59.9% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 11.1% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #368 of 3,254 · #6 of 87 in Minnesota.

Flagged-rate neighbourhood around St. Louis County

Lowest/highest poles plus in-state counties nearest St. Louis County on % of SDWIS systems with ≥1 violation. Full ladder: /counties.

0% 20% 40% 60% 80% 100% Mahnomen · lowest St. Louis · this county Clearwater · near Watonwan · highest 22.2% 50.4% 50.5% 50.6% 51.7% 51.8% 100%

Source: EPA SDWIS (county aggregates) As of 2026-05-15

Water Systems

System Name Population Violations PFAS
Duluth 86,859 11 Clean
Hibbing 16,028 31 Clean
Virginia 8,361 1 Clean
Hermantown 7,215 0 Clean
Chisholm 4,940 3 Clean
Eveleth 3,770 45 Detected
Ely 3,258 21 Clean
Proctor 3,099 8 -
Mountain Iron 2,880 16 -
Hoyt Lakes 2,020 13 -
Gilbert 1,829 10 -
Aurora 1,764 14 -
White Township 1,559 9 -
Babbitt 1,379 8 -
U.S. Steel-Minntac 1,250 20 -
Rice Lake 1,085 3 -
Buhl 1,000 28 -
Biwabik 975 13 -
McCarthy Beach State Park 900 0 -
The Y Store 800 7 -
Cherry School 677 16 -
North Woods School, ISD No. 2142 650 8 -
Cook 574 21 -
Fayal Township 565 10 -
South Ridge School 525 17 -
Floodwood 501 31 Clean
Cotton Super America 500 0 -
Breitung 446 13 -
Tower 426 38 -
Anchor Lake Travel Info Center MNDOT 415 0 -
Chalstrom's Bait and Tackle 400 0 -
Townline Short Stop 400 12 -
Voyageur's Lutheran Ministry - Camp Verm 400 0 -
Keetac 400 0 -
Twig Mercantile 350 0 -
YMCA Camp du Nord 350 46 -
Lakewood Elementary School, ISD No. 709 305 0 -
Jim's Ash Trail Store 300 7 -
Independent Apostolic Lutheran Church 300 0 -
Beaver River Farm Wedding & Event Center 300 0 -
Red Pine Campground 273 0 -
Old School Lives, Inc. 260 0 -
Burntside Lodge 254 18 -
North Shore Community School 250 4 -
Holiday Stationstore No. 409 250 48 -
St. Raphael's Church 250 0 -
Orr 249 9 -
Pine Acres Resort & Campground 225 0 -
Pike Lake School, ISD No. 704 220 25 -
Northeast Regional Correction Center 210 22 -

Compare beyond Minnesota

Lower-flagged peers for St. Louis County

Cross-state counties nearest St. Louis County on flagged-system share (50.5%) and cumulative violation count (3,967). In-state neighbours stay on the compliance plate above.

Similar flagged-system rate

Nearest cross-state counties by % of SDWIS systems with at least one violation on record.

4 peers

Similar violation load

Nearest cross-state counties by cumulative SDWIS violation count (all systems in the county).

4 peers

Read our methodology · Check your water system - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.