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County profile · EPA SDWIS + UCMR5

Madison County, Nebraska

25 SDWIS-listed public water systems serve 34,386 people in Madison County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

25
SDWIS water systems Middle third of counties
573
Total violations Lower third of counties
84.0%
SDWIS systems w/ a violation Lower third of counties
0.0%
UCMR5 PFAS rate (1 tested) Lower third of counties with tests

SDWIS compliance plate

Sheet NE119 · Madison County 25 sys · 573 viol · #1242/3254

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

  • VIOL-SEVERE 84.0% flagged
  • HEALTH-HIGH 64.4% health
  • RANK-UPPER #1242/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 25 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Gage County (+ 0 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Madison County ranks #1,242 of 3,254 counties by people served, and #6 of 93 counties in Nebraska. See methodology · corpus placement.

Madison County standing, lower-flagged corpus third

Flagged-system rate 84.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 64.4% 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 #1,242 of 3,254 · #6 of 93 in Nebraska.

Flagged-rate neighbourhood around Madison County

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

0% 20% 40% 60% 80% 100% Kimball · lowest Madison · this county Gosper · near Blaine · highest 57.1% 83.7% 84% 84% 84.2% 84.6% 100%

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

Water Systems

Compare beyond Nebraska

Lower-flagged peers for Madison County

Cross-state counties nearest Madison County on flagged-system share (84.0%) and cumulative violation count (573). 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.