PlainWater

Adams County, Iowa

SDWIS compliance plate

Sheet IA003 · Adams County 2 sys · 922 viol · #2854/3254

VIOL-SEVERE · HEALTH-LOW · RANK-BOTTOM · PHOTO-FINISH · PFAS-NONE · SRC-SW · SYS-TINY · BOOK-MOST

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-LOW 4.0% health
  • RANK-BOTTOM #2854/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-NONE No UCMR5 set
  • SRC-SW SW lead 100%
  • SYS-TINY 2 systems
  • BOOK-MOST 6/7 fields

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

According to EPA SDWIS county population served used on /counties, Adams County ranks #2,854 of 3,254 counties by people served, and #92 of 99 counties in Iowa. See methodology · corpus placement.

Adams County standing, mid-flagged corpus third

Flagged-system rate 100.0% is in the corpus middle third (≤ 100.0% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 4.0% is health-based share at or below the lower third (≤ 10.3%) . No UCMR5 tests in this extract for Adams County . Population served ranks #2,854 of 3,254 · #92 of 99 in Iowa.

Flagged-rate neighbourhood around Adams County

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

0% 20% 40% 60% 80% 100% Mahaska · lowest Ringgold · highest Decatur · near Des Moines · near 75% 100% 100% 100% 100% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Sirwa - Corning 2,585 29 -
Corning Muni Water Department 1,735 893 -

Compare beyond Iowa

Mid-flagged peers for Adams County

Cross-state counties nearest Adams County on flagged-system share (100.0%) and cumulative violation count (922). In-state neighbours stay on the compliance plate above.

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.