PlainWater

Koochiching County, Minnesota

SDWIS compliance plate

Sheet MN071 · Koochiching County 34 sys · 493 viol · #2391/3254

VIOL-SEVERE · HEALTH-HIGH · RANK-LOWER · PHOTO-FINISH · PFAS-CLEAN · SRC-GW · SYS-SMALL · BOOK-FULL

  • VIOL-SEVERE 55.9% flagged
  • HEALTH-HIGH 51.3% health
  • RANK-LOWER #2391/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 59%
  • SYS-SMALL 34 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Koochiching County ranks #2,391 of 3,254 counties by people served, and #61 of 87 counties in Minnesota. See methodology · corpus placement.

Koochiching County standing, lower-flagged corpus third

Flagged-system rate 55.9% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 51.3% is health-based share above the upper third (> 24.5%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #2,391 of 3,254 · #61 of 87 in Minnesota.

Flagged-rate neighbourhood around Koochiching County

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

0% 20% 40% 60% 80% 100% Mahnomen · lowest Roseau · near Le Sueur · near Watonwan · highest 22.2% 55.6% 55.6% 55.9% 56% 56.4% 100%

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

Water Systems

Compare beyond Minnesota

Lower-flagged peers for Koochiching County

Cross-state counties nearest Koochiching County on flagged-system share (55.9%) and cumulative violation count (493). 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
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.