PlainWater

DeKalb County, Missouri

SDWIS compliance plate

Sheet MO063 · DeKalb County 6 sys · 683 viol · #2314/3254

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

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-HIGH 75.3% health
  • RANK-LOWER #2314/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 83%
  • SYS-TINY 6 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, DeKalb County ranks #2,314 of 3,254 counties by people served, and #71 of 115 counties in Missouri. See methodology · corpus placement.

DeKalb 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 75.3% 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 #2,314 of 3,254 · #71 of 115 in Missouri.

Flagged-rate neighbourhood around DeKalb County

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

0% 20% 40% 60% 80% 100% Shannon · lowest Mercer · highest Jackson · near Boone · near 69.6% 100% 100% 100% 100% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Dekalb County PWSD 1 7,635 7 Clean
Maysville PWS 1,096 555 -
MO American Stewartsville 750 38 -
Osborn PWS 405 35 -
Union Star PWS 386 35 -
Clarksdale PWS 245 13 -

Compare beyond Missouri

Mid-flagged peers for DeKalb County

Cross-state counties nearest DeKalb County on flagged-system share (100.0%) and cumulative violation count (683). 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.