County · Missouri
Harrison County, Missouri: drinking water records
This overview covers 8 ZIP codes and 9 community water systems in Harrison 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 |
|---|---|---|---|---|---|
| Harrison County Pwsd 2 MO1024242 | 3,740 | 60 | 0 | 1 | 1.3 ppb |
| Bethany PWS MO1010068 | 3,292 | 0 | 0 | 1 | 1.7 ppb |
| Mercer County Pwsd 1 MO2024382 | 3,200 | 360 | 1 | 0 | 0 ppb |
| Gilman City PWS MO1010306 | 380 | 0 | 0 | 4 | 1.5 ppb |
| New Hampton PWS MO1010567 | 283 | 0 | 0 | 1 | 0 ppb |
| Harrison County Pwsd 1 MO1024241 | 823 | 0 | 0 | 0 | 0 ppb |
| Ridgeway PWS MO1010688 | 372 | 0 | 0 | 0 | 0 ppb |
| Cainsville PWS MO1010122 | 290 | 0 | 0 | 0 | 1.7 ppb |
| Great Northwest Wholesale Water Commiss MO1071603 | 25 | 0 | 0 | 0 | not reported |
ZIP reports in Harrison 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.