CS EL PRADO WATER COMPANY
PWSID: AZ0414442 · Des Peres, MO · Serves 404 people
CS EL PRADO WATER COMPANY has 113 health-based violations out of 113 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
CS EL PRADO WATER COMPANY (PWSID AZ0414442) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 404 people in Des Peres, MO, and is subject to primacy enforcement by the Missouri drinking-water program.
The system's federal compliance record contains 113 total violations, with 113 classified as health-based (MCL exceedances or treatment-technique failures). 3 distinct contaminants have been cited, including Barium, Fluoride, E. coli. Recorded violations span 2007–2025.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Missouri state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- AZ0414442
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Des Peres, MO
- Population Served
- 404
- Health Violations
- Yes (113)
What contaminants are in this water system?
Violation History (113)
| Contaminant | Health | Date |
|---|---|---|
| Barium | Yes | Jul 1, 2025 |
| Barium | Yes | Apr 1, 2025 |
| Barium | Yes | Apr 1, 2025 |
| Barium | Yes | Jan 1, 2025 |
| Barium | Yes | Jan 1, 2025 |
| Barium | Yes | Jan 1, 2025 |
| Barium | Yes | Oct 1, 2024 |
| Barium | Yes | Jul 1, 2024 |
| Barium | Yes | Jul 1, 2024 |
| Barium | Yes | Apr 1, 2024 |
| Barium | Yes | Apr 1, 2024 |
| Barium | Yes | Apr 1, 2024 |
| E. coli | Yes | Mar 1, 2024 |
| E. coli | Yes | Mar 1, 2024 |
| E. coli | Yes | Mar 1, 2024 |
| Barium | Yes | Oct 1, 2022 |
| Barium | Yes | Oct 1, 2022 |
| Barium | Yes | Oct 1, 2022 |
| Barium | Yes | Oct 1, 2022 |
| Barium | Yes | Jul 1, 2022 |
| Barium | Yes | Jul 1, 2022 |
| Barium | Yes | Jul 1, 2022 |
| Barium | Yes | Jul 1, 2022 |
| Barium | Yes | Apr 1, 2022 |
| Barium | Yes | Apr 1, 2022 |
| Barium | Yes | Apr 1, 2022 |
| Fluoride | Yes | Mar 10, 2022 |
| Fluoride | Yes | Mar 10, 2022 |
| Fluoride | Yes | Mar 10, 2022 |
| Fluoride | Yes | Mar 10, 2022 |
| Fluoride | Yes | Mar 10, 2022 |
| Fluoride | Yes | Mar 10, 2022 |
| Fluoride | Yes | Mar 2, 2022 |
| Fluoride | Yes | Mar 2, 2022 |
| Barium | Yes | Jan 1, 2022 |
| Barium | Yes | Jan 1, 2022 |
| Barium | Yes | Jan 1, 2022 |
| Barium | Yes | Oct 1, 2021 |
| Barium | Yes | Oct 1, 2021 |
| Barium | Yes | Oct 1, 2021 |
| Barium | Yes | Jul 1, 2021 |
| Barium | Yes | Jul 1, 2021 |
| Barium | Yes | Jul 1, 2021 |
| Barium | Yes | Apr 1, 2021 |
| Barium | Yes | Apr 1, 2021 |
| Barium | Yes | Apr 1, 2021 |
| Barium | Yes | Jan 1, 2021 |
| Barium | Yes | Jan 1, 2021 |
| Barium | Yes | Jan 1, 2021 |
| Barium | Yes | Oct 1, 2020 |
| Barium | Yes | Oct 1, 2020 |
| Barium | Yes | Oct 1, 2020 |
| Barium | Yes | Jul 10, 2019 |
| Barium | Yes | Jul 10, 2019 |
| Barium | Yes | Jul 10, 2019 |
| Barium | Yes | Apr 1, 2019 |
| Barium | Yes | Apr 1, 2019 |
| Barium | Yes | Apr 1, 2019 |
| Barium | Yes | Jan 1, 2019 |
| Barium | Yes | Jan 1, 2019 |
| Barium | Yes | Jan 1, 2019 |
| Barium | Yes | Oct 1, 2018 |
| Barium | Yes | Oct 1, 2018 |
| Barium | Yes | Oct 1, 2018 |
| Barium | Yes | Jul 1, 2018 |
| Barium | Yes | Jul 1, 2018 |
| Barium | Yes | Jul 1, 2018 |
| Barium | Yes | Apr 1, 2018 |
| Barium | Yes | Apr 1, 2018 |
| Barium | Yes | Apr 1, 2018 |
| Barium | Yes | Jan 1, 2018 |
| Barium | Yes | Jan 1, 2018 |
| Barium | Yes | Jan 1, 2018 |
| Barium | Yes | Jul 1, 2016 |
| Barium | Yes | Jul 1, 2016 |
| Barium | Yes | Jul 1, 2016 |
| Barium | Yes | Apr 1, 2016 |
| Barium | Yes | Apr 1, 2016 |
| Barium | Yes | Apr 1, 2016 |
| Barium | Yes | Jan 1, 2016 |
| Barium | Yes | Jan 1, 2016 |
| Barium | Yes | Jan 1, 2016 |
| Barium | Yes | Oct 1, 2015 |
| Barium | Yes | Oct 1, 2015 |
| Barium | Yes | Oct 1, 2015 |
| Barium | Yes | Oct 1, 2012 |
| Barium | Yes | Oct 1, 2012 |
| Barium | Yes | Jul 1, 2012 |
| Barium | Yes | Jul 1, 2012 |
| Barium | Yes | Apr 1, 2012 |
| Barium | Yes | Apr 1, 2012 |
| Barium | Yes | Jan 1, 2012 |
| Barium | Yes | Jan 1, 2012 |
| Barium | Yes | Oct 1, 2011 |
| Barium | Yes | Oct 1, 2011 |
| Barium | Yes | Jul 1, 2011 |
| Barium | Yes | Jul 1, 2011 |
| Barium | Yes | Jan 1, 2011 |
| Barium | Yes | Jan 1, 2011 |
| Barium | Yes | Oct 1, 2010 |
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.