PlainWater

Buchanan County, Iowa

SDWIS compliance plate

Sheet IA019 · Buchanan County 20 sys · 994 viol · #2145/3254

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

  • VIOL-SEVERE 85.0% flagged
  • HEALTH-MID 23.0% health
  • RANK-LOWER #2145/3254
  • PHOTO-FINISH ±0.7 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 20 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Story County (+ 0.7 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Buchanan County ranks #2,145 of 3,254 counties by people served, and #50 of 99 counties in Iowa. See methodology · corpus placement.

Buchanan County standing, lower-flagged corpus third

Flagged-system rate 85.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 23.0% is health-based share in the middle 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 #2,145 of 3,254 · #50 of 99 in Iowa.

Flagged-rate neighbourhood around Buchanan County

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

0% 20% 40% 60% 80% 100% Mahaska · lowest Story · near O'Brien · near Ringgold · highest 75% 85% 85.7% 85.7% 85.7% 87.5% 100%

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

Water Systems

Compare beyond Iowa

Lower-flagged peers for Buchanan County

Cross-state counties nearest Buchanan County on flagged-system share (85.0%) and cumulative violation count (994). 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.