MEMC LLC
Missouri — Non-Transient Non-Community — PWSID: MO6180570
System Information
| PWSID | MO6180570 |
| System Name | MEMC LLC |
| System Type | Non-Transient Non-Community |
| Water Source | Ground Water |
| Activity Status | Active |
| Owner Type | Private |
| EPA Region | 07 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Feb 3, 1982 |
| Last Reported | Dec 31, 2025 |
Location & Contact
| State | Missouri |
| City | ST PETERS |
| ZIP Code | 63376-0000 |
| Address | 501 PEARL DR |
| Organization | JUAN, MARY |
| Phone | 636-474-7468 |
Population & Service
| Population Served | 350 |
| Service Connections | 16 |
Drinking Water Violations (34)
This water system has 34 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, 2024 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2024 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2024 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jul 1, 2024 | — | Stage 1 Disinfectants and Disinfection Byproducts Rule | TT | Yes | No | — | — | — | Resolved | Sep 26, 2024 | Stage 1 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | TTHM | MR | No | Yes | — | 0.080 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 1, 2020 | Dec 31, 2022 | Total Haloacetic Acids (HAA5) | MR | No | Yes | — | 0.060 mg/L | — | Resolved | Dec 31, 2022 | Stage 2 Disinfectants and Disinfection Byproducts Rule |
| Jan 18, 2013 | — | Public Notice | Other | No | No | — | — | — | Resolved | Feb 17, 2012 | Public Notice Rule and Revised PN Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Dec 1, 2011 | Dec 31, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Dec 31, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Nov 1, 2011 | Nov 30, 2011 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Nov 30, 2011 | Total Coliform Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jun 1, 2006 | Jun 30, 2006 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2006 | Total Coliform Rule |
| Jun 1, 2004 | Jun 30, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2004 | Total Coliform Rule |
| Jun 1, 2004 | Jun 30, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2004 | Total Coliform Rule |
| Jun 1, 2004 | Jun 30, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2004 | Total Coliform Rule |
| Jun 1, 2004 | Jun 30, 2004 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Jun 30, 2004 | Total Coliform Rule |
| Feb 1, 2003 | Feb 28, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2003 | Total Coliform Rule |
| Feb 1, 2003 | Feb 28, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2003 | Total Coliform Rule |
| Feb 1, 2003 | Feb 28, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2003 | Total Coliform Rule |
| Feb 1, 2003 | Feb 28, 2003 | Coliform (TCR) | MR | No | No | — | 5% of samples | — | Resolved | Feb 28, 2003 | Total Coliform Rule |
| Mar 21, 1991 | Apr 20, 1991 | Coliform (TCR) | MCL | Yes | No | — | 5% of samples | — | Archived | Apr 20, 1991 | Total Coliform Rule |
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.