County · Missouri
Jefferson County, Missouri: drinking water records
This overview covers 16 ZIP codes and 65 community water systems in Jefferson 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 |
|---|---|---|---|---|---|
| Crystal City PWS MO6010198 | 4,733 | 120 | 1 | 3 | 0 ppb |
| Jefferson Co Cons Pwsd C 1 MO6024295 | 37,000 | 120 | 0 | 0 | 0 ppb |
| Jefferson County Pwsd 1 MO6024292 | 21,113 | 120 | 0 | 0 | 7.3 ppb |
| Jefferson County Pwsd 3 MO6024294 | 17,000 | 120 | 0 | 0 | 0 ppb |
| Jefferson County Pwsd 2 MO6024293 | 16,548 | 180 | 0 | 0 | 0 ppb |
| Festus PWS MO6010276 | 13,000 | 120 | 1 | 0 | 0 ppb |
| Jefferson County Pwsd 10 MO6024302 | 10,000 | 120 | 0 | 0 | 3.9 ppb |
| Jefferson County Pwsd 5 MO6024296 | 8,000 | 300 | 0 | 0 | 1.1 ppb |
| Jefferson County Pwsd 6 MO6024298 | 7,500 | 300 | 1 | 0 | 2.9 ppb |
| Desoto PWS MO6010213 | 6,400 | 120 | 0 | 0 | 1.5 ppb |
| Jefferson County Pwsd 7 MO6024299 | 6,100 | 300 | 0 | 0 | 3.9 ppb |
| Pevely PWS MO6010638 | 5,600 | 240 | 0 | 0 | 2.2 ppb |
| Herculaneum PWS MO6010359 | 5,000 | 240 | 1 | 0 | 1.4 ppb |
| Jefferson Co Pwsd 8 MO6024300 | 4,733 | 180 | 0 | 0 | 2.5 ppb |
| Hillsboro PWS MO6010368 | 3,000 | 0 | 0 | 1 | 4.3 ppb |
| Jcpsd Summer Set MO6036031 | 1,080 | 0 | 0 | 1 | 1.6 ppb |
| Antire Valley Subd MO6036274 | 260 | 0 | 0 | 2 | 0 ppb |
| Palisades Village MO6036316 | 142 | 0 | 0 | 1 | 4.4 ppb |
| Frontier Estates MO6036101 | 120 | 0 | 0 | 1 | 5.0 ppb |
| Weber Hill MHP MO6048200 | 80 | 0 | 0 | 3 | 0.5 ppb |
| Cedar Hill Lakes Village MO6010970 | 65 | 0 | 0 | 2 | 2.6 ppb |
| Paradise Estates MHP MO6048094 | 58 | 0 | 0 | 1 | 3.4 ppb |
| Ficken Hill Subd MO6036042 | 25 | 0 | 0 | 2 | 1.0 ppb |
| Jefferson County Pwsd 12 MO6024304 | 3,300 | 0 | 0 | 0 | 3.2 ppb |
| Raintree Plantation MO6036271 | 2,200 | 0 | 0 | 0 | 1.5 ppb |
ZIP reports in Jefferson 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.