MEMC LLC
PWS ID: MO6180570 · ST PETERS, Missouri 63376-0000
Population Served
350
Total Violations
38
Health-Based Violations
5
Water Source
Groundwater
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 16
- County
- St. Charles
- School/Daycare
- No
- MCL Violations
- 1
- Monitoring Violations
- 28
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 20 | 2011 |
| TTHM | MR | 4 | 2020 |
| Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | 4 | 2024 |
| Total Haloacetic Acids (HAA5) | MR | 4 | 2020 |
| Public Notice | Other | 1 | 2013 |
| Coliform (TCR) | MCL | 1 | 1991 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.