PlainWater

County profile · EPA SDWIS + UCMR5

Clinton County, Iowa

28 SDWIS-listed public water systems serve 40,325 people in Clinton County. Violation rates use that full inventory; PFAS rates use only the UCMR5-tested subset.

28
SDWIS water systems Middle third of counties
1,996
Total violations Middle third of counties
96.4%
SDWIS systems w/ a violation Middle third of counties
33.3%
UCMR5 PFAS rate (3 tested) Middle third of counties with tests

SDWIS compliance plate

Sheet IA045 · Clinton County 28 sys · 1,996 viol · #1102/3254

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

  • VIOL-SEVERE 96.4% flagged
  • HEALTH-LOW 19.0% health
  • RANK-UPPER #1102/3254
  • PHOTO-FINISH ±0.1 pp
  • PFAS-MID 33.3% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 28 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Kossuth County ( -0.1 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Clinton County ranks #1,102 of 3,254 counties by people served, and #14 of 99 counties in Iowa. See methodology · corpus placement.

Clinton County standing, mid-flagged corpus third

Flagged-system rate 96.4% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 19.0% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 33.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #1,102 of 3,254 · #14 of 99 in Iowa.

Flagged-rate neighbourhood around Clinton County

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

0% 20% 40% 60% 80% 100% Mahaska · lowest Dubuque · near Clinton · this county Ringgold · highest 75% 96% 96% 96.3% 96.4% 97.1% 100%

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

Water Systems

Compare beyond Iowa

Mid-flagged peers for Clinton County

Cross-state counties nearest Clinton County on flagged-system share (96.4%) and cumulative violation count (1,996). 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.