LAKE THUNDERHEAD
Missouri - Community Water System - PWSID: MO2036165
System Information
| PWSID | MO2036165 |
| System Name | LAKE THUNDERHEAD |
| System Type | Community Water System |
| Water Source | Surface Water Purchased |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Mar 7, 1980 |
| Last Reported | Mar 25, 2026 |
Location & Contact
| State | Missouri |
| City | UNIONVILLE |
| ZIP Code | 63565-0000 |
| Address | 10223 WILDFLOWER DR |
| Organization | WEIR, RODNEY |
| Phone | 660-947-3267 |
Population & Service
| Population Served | 585 |
| Service Connections | 652 |
Drinking Water Violations (94)
This water system has 94 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nov 1, 2025 | Nov 30, 2025 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2025 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Sep 10, 2024 | - | |
| Jul 1, 2024 | - | Other | No | No | - | - | - | Resolved | Sep 10, 2024 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Nov 1, 2023 | - | |
| Jul 1, 2023 | - | Other | No | No | - | - | - | Resolved | Nov 1, 2023 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Oct 1, 2021 | Oct 31, 2021 | MON | No | Yes | - | - | - | Resolved | Oct 31, 2021 | - | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2021 | - | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2021 | - | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2021 | - | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2021 | - | |
| Jun 1, 2021 | Jun 30, 2021 | MON | No | Yes | - | - | - | Resolved | Jun 30, 2021 | - | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2020 | - | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2020 | - | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2020 | - | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2020 | - | |
| Nov 1, 2020 | Nov 30, 2020 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2020 | - | |
| Jul 1, 2020 | - | Other | No | No | - | - | - | Resolved | Nov 9, 2020 | - | |
| Nov 1, 2019 | Nov 30, 2019 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2019 | - | |
| Nov 1, 2019 | Nov 30, 2019 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2019 | - | |
| Nov 1, 2019 | Nov 30, 2019 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2019 | - | |
| Nov 1, 2019 | Nov 30, 2019 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2019 | - | |
| Nov 1, 2019 | Nov 30, 2019 | MON | No | Yes | - | - | - | Resolved | Nov 30, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Jul 1, 2019 | Jul 31, 2019 | MON | No | Yes | - | - | - | Resolved | Jul 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Mar 1, 2019 | Mar 31, 2019 | MON | No | Yes | - | - | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.080 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2019 | Mar 31, 2019 | MR | No | Yes | - | 0.060 mg/L | - | Resolved | Mar 31, 2019 | - | |
| Jan 1, 2017 | - | Other | No | No | - | - | - | Resolved | Dec 15, 2020 | - | |
| Jan 1, 2017 | - | Other | No | No | - | - | - | Resolved | Dec 15, 2020 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | 102 UG/L | 0.080 mg/L | 80 | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | 102 UG/L | 0.080 mg/L | 80 | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | 72 UG/L | 0.060 mg/L | 60 | Resolved | Sep 30, 2016 | - | |
| Jul 1, 2016 | Sep 30, 2016 | MCL | Yes | No | 102 UG/L | 0.080 mg/L | 80 | Resolved | Sep 30, 2016 | - |
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.