PlainWater

Warren County, Iowa

SDWIS compliance plate

Sheet IA181 · Warren County 12 sys · 571 viol · #875/3254

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

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-MID 24.5% health
  • RANK-UPPER #875/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-MID 25.0% detect
  • SRC-SW SW lead 67%
  • SYS-SMALL 12 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Warren County ranks #875 of 3,254 counties by people served, and #12 of 99 counties in Iowa. See methodology · corpus placement.

Warren 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 24.5% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 25.0% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #875 of 3,254 · #12 of 99 in Iowa.

Flagged-rate neighbourhood around Warren County

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

0% 20% 40% 60% 80% 100% Mahaska · lowest Ringgold · highest Decatur · near Muscatine · 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
Warren Water District 20,095 34 Clean
Indianola Water Supply 15,833 45 Clean
Norwalk Water Supply 14,334 55 Clean
Carlisle Water Supply 4,170 67 Detected
Milo Public Water Supply 788 115 -
New Virginia Water Supply 498 64 -
Martensdale Water Supply 421 23 -
Lacona Water Supply 361 30 -
North American Mobile Home Park 235 4 -
Wilshire Hills Mhc 216 5 -
Hartford Mhc LLC 183 4 -
Saint Marys Water Corporation 121 125 -

Compare beyond Iowa

Mid-flagged peers for Warren County

Cross-state counties nearest Warren County on flagged-system share (100.0%) and cumulative violation count (571). 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.