PlainWater

Allen County, Kansas

SDWIS compliance plate

Sheet KS001 · Allen County 14 sys · 815 viol · #2354/3254

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

  • VIOL-SEVERE 100.0% flagged
  • HEALTH-MID 23.2% health
  • RANK-LOWER #2354/3254
  • PHOTO-FINISH ±0.0 pp
  • PFAS-MID 33.3% detect
  • SRC-SW SW lead 100%
  • SYS-SMALL 14 systems
  • BOOK-FULL 7/7 fields

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

According to EPA SDWIS county population served used on /counties, Allen County ranks #2,354 of 3,254 counties by people served, and #37 of 105 counties in Kansas. See methodology · corpus placement.

Allen 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 23.2% is health-based share in the middle third (≤ 24.5%) . UCMR5 detect rate 33.3% is UCMR5 detect rate in the tested-pool middle third (≤ 33.3%) . Population served ranks #2,354 of 3,254 · #37 of 105 in Kansas.

Flagged-rate neighbourhood around Allen County

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

0% 20% 40% 60% 80% 100% Chase · lowest Greeley · highest Wyandotte · near Leavenworth · near 85.7% 100% 100% 100% 100% 100% 100%

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

Water Systems

System Name Population Violations PFAS
Iola, City Of 5,343 135 Detected
Humboldt, City Of 1,836 31 -
Allen Co RWD 8 736 83 -
Gas City, City Of 501 23 Clean
La Harpe, City Of 484 86 -
Moran, City Of 467 43 Clean
Allen Co RWD 15 135 24 -
Allen Co RWD 16 133 84 -
Allen Co RWD 10 125 126 -
Allen Co RWD 13 100 22 -
Allen Co RWD 4 52 35 -
Allen Co RWD 6 45 17 -
Allen Co RWD 12 33 101 -
Public Wholesale WSD 5 1 5 -

Compare beyond Kansas

Mid-flagged peers for Allen County

Cross-state counties nearest Allen County on flagged-system share (100.0%) and cumulative violation count (815). 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.