PATTERSON VALLEY WC
PWSID: CO0145540 · Rocky Ford, CO · Serves 96 people
PATTERSON VALLEY WC has 86 health-based violations out of 86 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
PATTERSON VALLEY WC (PWSID CO0145540) 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 96 people in Rocky Ford, CO, and is subject to primacy enforcement by the Colorado drinking-water program.
The system's federal compliance record contains 86 total violations, with 86 classified as health-based (MCL exceedances or treatment-technique failures). 2 distinct contaminants have been cited, including Lead & Copper Rule, Copper. Recorded violations span 2016–2025.
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 Colorado state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CO0145540
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Rocky Ford, CO
- Population Served
- 96
- Health Violations
- Yes (86)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Lead & Copper Rule | 43 | 43 |
| Copper | 43 | 43 |
Violation History (86)
| Contaminant | Health | Date |
|---|---|---|
| Lead & Copper Rule | Yes | Jul 1, 2025 |
| Copper | Yes | Jul 1, 2025 |
| Copper | Yes | Apr 1, 2025 |
| Lead & Copper Rule | Yes | Apr 1, 2025 |
| Copper | Yes | Jan 1, 2025 |
| Lead & Copper Rule | Yes | Jan 1, 2025 |
| Copper | Yes | Oct 1, 2024 |
| Lead & Copper Rule | Yes | Oct 1, 2024 |
| Copper | Yes | Jul 1, 2024 |
| Copper | Yes | Jul 1, 2024 |
| Lead & Copper Rule | Yes | Jul 1, 2024 |
| Lead & Copper Rule | Yes | Jul 1, 2024 |
| Copper | Yes | Apr 1, 2024 |
| Copper | Yes | Apr 1, 2024 |
| Lead & Copper Rule | Yes | Apr 1, 2024 |
| Lead & Copper Rule | Yes | Apr 1, 2024 |
| Copper | Yes | Jan 1, 2024 |
| Copper | Yes | Jan 1, 2024 |
| Lead & Copper Rule | Yes | Jan 1, 2024 |
| Lead & Copper Rule | Yes | Jan 1, 2024 |
| Copper | Yes | Oct 1, 2023 |
| Copper | Yes | Oct 1, 2023 |
| Lead & Copper Rule | Yes | Oct 1, 2023 |
| Lead & Copper Rule | Yes | Oct 1, 2023 |
| Copper | Yes | Jul 1, 2023 |
| Copper | Yes | Jul 1, 2023 |
| Lead & Copper Rule | Yes | Jul 1, 2023 |
| Lead & Copper Rule | Yes | Jul 1, 2023 |
| Copper | Yes | Apr 1, 2023 |
| Copper | Yes | Apr 1, 2023 |
| Lead & Copper Rule | Yes | Apr 1, 2023 |
| Lead & Copper Rule | Yes | Apr 1, 2023 |
| Copper | Yes | Jan 1, 2023 |
| Copper | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Jan 1, 2023 |
| Lead & Copper Rule | Yes | Oct 1, 2022 |
| Lead & Copper Rule | Yes | Oct 1, 2022 |
| Copper | Yes | Oct 1, 2022 |
| Copper | Yes | Oct 1, 2022 |
| Lead & Copper Rule | Yes | Jul 1, 2022 |
| Lead & Copper Rule | Yes | Jul 1, 2022 |
| Copper | Yes | Jul 1, 2022 |
| Copper | Yes | Jul 1, 2022 |
| Lead & Copper Rule | Yes | Apr 1, 2022 |
| Lead & Copper Rule | Yes | Apr 1, 2022 |
| Copper | Yes | Apr 1, 2022 |
| Copper | Yes | Apr 1, 2022 |
| Lead & Copper Rule | Yes | Jan 1, 2022 |
| Copper | Yes | Jan 1, 2022 |
| Lead & Copper Rule | Yes | Oct 1, 2021 |
| Copper | Yes | Oct 1, 2021 |
| Lead & Copper Rule | Yes | Jul 1, 2021 |
| Copper | Yes | Jul 1, 2021 |
| Lead & Copper Rule | Yes | Apr 1, 2021 |
| Copper | Yes | Apr 1, 2021 |
| Lead & Copper Rule | Yes | Jan 1, 2021 |
| Copper | Yes | Jan 1, 2021 |
| Lead & Copper Rule | Yes | Oct 1, 2020 |
| Copper | Yes | Oct 1, 2020 |
| Lead & Copper Rule | Yes | Jul 1, 2020 |
| Copper | Yes | Jul 1, 2020 |
| Copper | Yes | Apr 1, 2020 |
| Lead & Copper Rule | Yes | Apr 1, 2020 |
| Copper | Yes | Jan 1, 2020 |
| Lead & Copper Rule | Yes | Jan 1, 2020 |
| Copper | Yes | Oct 1, 2019 |
| Lead & Copper Rule | Yes | Oct 1, 2019 |
| Copper | Yes | Jul 1, 2019 |
| Lead & Copper Rule | Yes | Jul 1, 2019 |
| Copper | Yes | Apr 1, 2019 |
| Lead & Copper Rule | Yes | Apr 1, 2019 |
| Copper | Yes | Jan 1, 2019 |
| Lead & Copper Rule | Yes | Jan 1, 2019 |
| Copper | Yes | Oct 1, 2018 |
| Lead & Copper Rule | Yes | Oct 1, 2018 |
| Copper | Yes | Jul 1, 2018 |
| Lead & Copper Rule | Yes | Jul 1, 2018 |
| Copper | Yes | Apr 1, 2018 |
| Lead & Copper Rule | Yes | Apr 1, 2018 |
| Copper | Yes | Jan 1, 2018 |
| Lead & Copper Rule | Yes | Jan 1, 2018 |
| Lead & Copper Rule | Yes | Jan 1, 2017 |
| Copper | Yes | Jan 1, 2017 |
| Copper | Yes | Jan 1, 2016 |
| Lead & Copper Rule | Yes | Jan 1, 2016 |
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.