County · Kansas
Allen County, Kansas: drinking water records
This overview covers 7 ZIP codes and 14 community water systems in Allen County. It also stands in for 0 ZIP codes whose utility has too little EPA data for a page of its own.
System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.
Water systems with the most complete records
| Water system | People served | PFAS survey results | PFAS found | Health-based violations | Lead, 9 in 10 homes at or below |
|---|---|---|---|---|---|
| Iola, City of KS2000103 | 5,343 | 120 | 2 | 0 | 7.9 ppb |
| Gas City, City of KS2000102 | 501 | 120 | 0 | 0 | 3.4 ppb |
| Moran, City of KS2000116 | 467 | 120 | 0 | 0 | 1.3 ppb |
| Allen Co Rwd 10 KS2000109 | 125 | 0 | 0 | 1 | 1.1 ppb |
| Allen Co Rwd 4 KS2000112 | 52 | 0 | 0 | 1 | 2 ppb |
| Allen Co Rwd 12 KS2000117 | 33 | 0 | 0 | 3 | 0.8 ppb |
| Humboldt, City of KS2000111 | 1,836 | 0 | 0 | 0 | 1.7 ppb |
| Allen Co Rwd 8 KS2000110 | 736 | 0 | 0 | 0 | 1.5 ppb |
| La Harpe, City of KS2000105 | 484 | 0 | 0 | 0 | 1.1 ppb |
| Allen Co Rwd 15 KS2000121 | 135 | 0 | 0 | 0 | 0 ppb |
| Allen Co Rwd 16 KS2000122 | 133 | 0 | 0 | 0 | 2.3 ppb |
| Allen Co Rwd 13 KS2000118 | 100 | 0 | 0 | 0 | 1 ppb |
| Allen Co Rwd 6 KS2000107 | 45 | 0 | 0 | 0 | 0.5 ppb |
| Public Wholesale WSD 5 KS2000119 | 1 | 0 | 0 | 0 | not reported |
ZIP reports in Allen County
No ZIP report in this county is published yet.
Sources and scope
EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Page generated 2026-09-03.
Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.