OLD CONCHO WATER USERS
Missouri - Community Water System - PWSID: AZ0401011
System Information
| PWSID | AZ0401011 |
| System Name | OLD CONCHO WATER USERS |
| System Type | Community Water System |
| Water Source | Ground Water Purchased |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 09 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Oct 5, 1979 |
| Last Reported | May 14, 2026 |
Location & Contact
| State | Missouri |
| City | DES PERES |
| ZIP Code | 63131 |
| Address | 1630 Des Peres Rd. Suite 140 |
| Organization | THOMPSON, JULIANNE |
| Phone | 314-464-4084 |
Population & Service
| Population Served | 40 |
| Service Connections | 31 |
Drinking Water Violations (456)
This water system has 456 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan 1, 2026 | - | MR | No | No | - | TT | - | Resolved | Mar 25, 2026 | - | |
| Jan 1, 2026 | - | MR | No | No | - | TT | - | Resolved | Mar 25, 2026 | - | |
| Dec 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2025 | - | |
| Dec 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2025 | - | |
| Nov 1, 2025 | Nov 30, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 30, 2025 | - | |
| Nov 1, 2025 | Nov 30, 2025 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2025 | - | |
| Nov 1, 2025 | Nov 30, 2025 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2025 | - | |
| Nov 1, 2025 | Nov 30, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Nov 30, 2025 | - | |
| Nov 1, 2025 | Nov 30, 2025 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2025 | - | |
| Oct 1, 2025 | Oct 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Oct 31, 2025 | - | |
| Oct 1, 2025 | Oct 31, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Oct 31, 2025 | - | |
| Jul 1, 2025 | Jul 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2025 | - | |
| Jul 1, 2025 | Jul 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2025 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Oct 10, 2025 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Oct 10, 2025 | - | |
| Jul 1, 2025 | Jul 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2025 | - | |
| Apr 1, 2025 | Apr 30, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Apr 30, 2025 | - | |
| Apr 1, 2025 | Apr 30, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Apr 30, 2025 | - | |
| Apr 1, 2025 | Apr 30, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Apr 30, 2025 | - | |
| Feb 1, 2025 | Feb 28, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Feb 28, 2025 | - | |
| Feb 1, 2025 | Feb 28, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Feb 28, 2025 | - | |
| Feb 1, 2025 | Feb 28, 2025 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Feb 28, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2025 | Jan 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2025 | - | |
| Jan 1, 2025 | Jan 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2025 | - | |
| Jan 1, 2025 | Jan 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 0.080 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2025 | Dec 31, 2025 | MR | No | Yes | - | 0.060 mg/L | - | Archived | Dec 31, 2025 | - | |
| Jan 1, 2025 | Jan 31, 2025 | MON | No | Yes | - | - | - | Resolved | Jan 31, 2025 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2024 | - | |
| Dec 1, 2024 | Dec 31, 2024 | MON | No | Yes | - | - | - | Resolved | Dec 31, 2024 | - | |
| Oct 2, 2024 | - | Other | No | No | - | - | - | Resolved | Jul 4, 2025 | - | |
| Oct 2, 2024 | - | Other | No | No | - | - | - | Resolved | Jul 4, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Aug 25, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Aug 25, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Aug 25, 2025 | - | |
| Oct 1, 2024 | - | MR | No | No | - | TT | - | Resolved | Aug 25, 2025 | - | |
| Sep 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Sep 1, 2024 | Sep 30, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Sep 30, 2024 | - | |
| Aug 1, 2024 | Aug 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Aug 31, 2024 | - | |
| Aug 1, 2024 | Aug 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Aug 31, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Jul 4, 2025 | - | |
| Jul 1, 2024 | Jul 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jul 31, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Jul 4, 2025 | - | |
| Jul 1, 2024 | Jul 31, 2024 | MR | No | Yes | - | 4.0 mg/L | - | Resolved | Jul 31, 2024 | - |
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.