PlainWater

Calloway County, Kentucky

SDWIS compliance plate

Sheet KY035 · Calloway County 20 sys · 3,677 viol · #1295/3254

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

  • VIOL-SEVERE 90.0% flagged
  • HEALTH-LOW 0.8% health
  • RANK-UPPER #1295/3254
  • PHOTO-FINISH ±0.9 pp
  • PFAS-CLEAN 0.0% detect
  • SRC-GW GW lead 100%
  • SYS-SMALL 20 systems
  • BOOK-FULL 7/7 fields

Nearest flagged-rate peer: Trigg County (+ 0.9 pp flagged-rate)

According to EPA SDWIS county population served used on /counties, Calloway County ranks #1,295 of 3,254 counties by people served, and #35 of 118 counties in Kentucky. See methodology · corpus placement.

Calloway County standing, lower-flagged corpus third

Flagged-system rate 90.0% is at or below the corpus lower third (≤ 92.7% flagged) across 2,973 counties with ≥3 SDWIS systems . Health-based share 0.8% is health-based share at or below the lower third (≤ 10.3%) . UCMR5 detect rate 0.0% is UCMR5 detect rate at or below the tested-pool lower third (≤ 0.0%) . Population served ranks #1,295 of 3,254 · #35 of 118 in Kentucky.

Flagged-rate neighbourhood around Calloway County

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

0% 20% 40% 60% 80% 100% Ballard · lowest Trigg · near Jefferson · near 83.3% 90% 90.9% 100% 100% 100%

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

Water Systems

Compare beyond Kentucky

Lower-flagged peers for Calloway County

Cross-state counties nearest Calloway County on flagged-system share (90.0%) and cumulative violation count (3,677). 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.