WOODLAND PARK MUTUAL WATER CO
PWSID: CA4000506 · Arroyo Grande, CA · Serves 538 people
WOODLAND PARK MUTUAL WATER CO has 27 health-based violations out of 27 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
WOODLAND PARK MUTUAL WATER CO (PWSID CA4000506) 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 538 people in Arroyo Grande, CA, and is subject to primacy enforcement by the California drinking-water program.
The system's federal compliance record contains 27 total violations, with 27 classified as health-based (MCL exceedances or treatment-technique failures). 1 distinct contaminant has been cited, including Nitrate. Recorded violations span 2023–2025.
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 California state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- CA4000506
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Arroyo Grande, CA
- Population Served
- 538
- Health Violations
- Yes (27)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Nitrate | 27 | 27 |
Violation History (27)
| Contaminant | Health | Date |
|---|---|---|
| Nitrate | Yes | Jul 1, 2025 |
| Nitrate | Yes | Apr 1, 2025 |
| Nitrate | Yes | Apr 1, 2025 |
| Nitrate | Yes | Jan 1, 2025 |
| Nitrate | Yes | Jan 1, 2025 |
| Nitrate | Yes | Oct 1, 2024 |
| Nitrate | Yes | Oct 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Jul 1, 2024 |
| Nitrate | Yes | Apr 1, 2024 |
| Nitrate | Yes | Apr 1, 2024 |
| Nitrate | Yes | Apr 1, 2024 |
| Nitrate | Yes | Jan 1, 2024 |
| Nitrate | Yes | Jan 1, 2024 |
| Nitrate | Yes | Jan 1, 2024 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Oct 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
| Nitrate | Yes | Apr 1, 2023 |
Frequently Asked Questions
Is WOODLAND PARK MUTUAL WATER CO water safe to drink?
How many people does WOODLAND PARK MUTUAL WATER CO serve?
What violations does WOODLAND PARK MUTUAL WATER CO have?
What contaminants have been found in WOODLAND PARK MUTUAL WATER CO water?
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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.