JEFFERSON COUNTY PWSD 7
Missouri — Community Water System — PWSID: MO6024299
System Information
| PWSID | MO6024299 |
| System Name | JEFFERSON COUNTY PWSD 7 |
| System Type | Community Water System |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Local |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 7, 1980 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Missouri |
| City | HILLSBORO |
| ZIP Code | 63050-0000 |
| Address | 9784 WATER DISTRICT RD |
| Organization | MILLS, CODY |
| Phone | 636-479-5593 |
Population & Service
| Population Served | 6,100 |
| Service Connections | 2,523 |
Drinking Water Violations (15)
This water system has 15 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jul 1, 2025 | — | Other | No | No | — | — | — | Resolved | Nov 25, 2025 | — | |
| Jul 1, 2025 | — | Other | No | No | — | — | — | Resolved | Nov 25, 2025 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Nov 21, 2025 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Nov 21, 2025 | — | |
| Oct 17, 2024 | — | RPT | No | No | — | — | — | Resolved | Nov 21, 2025 | — | |
| Jun 1, 2011 | Jun 30, 2011 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2011 | — | |
| Jun 1, 2011 | Jun 30, 2011 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2011 | — | |
| Jun 1, 2011 | Jun 30, 2011 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2011 | — | |
| Jun 1, 2011 | Jun 30, 2011 | MCL | Yes | No | — | 5% of samples | — | Resolved | Jun 30, 2011 | — | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1995 | — | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1995 | — | |
| Dec 1, 1995 | Dec 31, 1995 | MR | No | No | — | 5% of samples | — | Archived | Dec 31, 1995 | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — | |
| — | — | — | No | No | — | — | — | — | — | — |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.