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County profile · EPA SDWIS + UCMR5

Nicollet County, Minnesota

26 SDWIS-listed public water systems serve 30,952 people in Nicollet County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

26
SDWIS water systems Middle third of counties
217
Total violations Lower third of counties
69.2%
SDWIS systems w/ a violation Lower third of counties
0.0%
UCMR5 PFAS rate (2 tested) Lower third of counties with tests

SDWIS compliance plate

Sheet MN103 · Nicollet County 26 sys · 217 viol · #1335/3254

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

  • VIOL-SEVERE 69.2% flagged
  • HEALTH-HIGH 62.7% health
  • RANK-MID #1335/3254
  • PHOTO-FINISH ±0.2 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 26 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Wabasha County (+ 0.2 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Nicollet County ranks #1,335 of 3,254 counties by people served, and #25 of 87 counties in Minnesota. See methodology · corpus placement.

Nicollet County standing, lower-flagged corpus third

Flagged-system rate 69.2% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 62.7% 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 #1,335 of 3,254 · #25 of 87 in Minnesota.

Flagged-rate neighbourhood around Nicollet County

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

0% 20% 40% 60% 80% 100% Mahnomen · lowest Fillmore · near Wabasha · near Watonwan · highest 22.2% 67.1% 67.8% 69.2% 69.4% 70% 100%

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

Water Systems

Compare beyond Minnesota

Lower-flagged peers for Nicollet County

Cross-state counties nearest Nicollet County on flagged-system share (69.2%) and cumulative violation count (217). 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. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.