OAKLEY MUTUAL WATER COMPANY
PWSID: CA0706004 · Oakley, CA · Serves 170 people
According to EPA Safe Drinking Water Information System (SDWIS), OAKLEY MUTUAL WATER COMPANY (PWSID CA0706004) in Oakley, CA is listed as a CWS water system covering about 170 people. The same extract lists 29 health-based violation records spanning 2021-2025. Those 29 health-based rows for OAKLEY MUTUAL WATER COMPANY cover contaminants such as Arsenic, LEAD AND COPPER RULE REVISIONS; they remain historical EPA registry entries, not a current compliance or drinkability score.
OAKLEY MUTUAL WATER COMPANY has 29 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 2 distinct EPA contaminant codes appear in this system's record, including Arsenic, LEAD AND COPPER RULE REVISIONS. Recorded violations span 2021–2025. Day-to-day primacy enforcement for this system runs through the California drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current 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)
- CA0706004
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Oakley, CA
- Population Served
- 170
- Health Violations
- Yes (29)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Arsenic | 28 | 28 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
Violation History (29)
| Contaminant | Health | Date |
|---|---|---|
| Arsenic | Yes | Oct 1, 2025 |
| Arsenic | Yes | Jul 1, 2025 |
| Arsenic | Yes | Apr 1, 2025 |
| Arsenic | Yes | Jan 1, 2025 |
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| Arsenic | Yes | Oct 1, 2024 |
| Arsenic | Yes | Oct 1, 2024 |
| Arsenic | Yes | Jul 1, 2024 |
| Arsenic | Yes | Jul 1, 2024 |
| Arsenic | Yes | Apr 1, 2024 |
| Arsenic | Yes | Apr 1, 2024 |
| Arsenic | Yes | Jan 1, 2024 |
| Arsenic | Yes | Jan 1, 2024 |
| Arsenic | Yes | Oct 1, 2023 |
| Arsenic | Yes | Oct 1, 2023 |
| Arsenic | Yes | Jul 1, 2023 |
| Arsenic | Yes | Jul 1, 2023 |
| Arsenic | Yes | Apr 1, 2023 |
| Arsenic | Yes | Apr 1, 2023 |
| Arsenic | Yes | Jan 1, 2023 |
| Arsenic | Yes | Jan 1, 2023 |
| Arsenic | Yes | Oct 1, 2022 |
| Arsenic | Yes | Oct 1, 2022 |
| Arsenic | Yes | Jul 1, 2022 |
| Arsenic | Yes | Jul 1, 2022 |
| Arsenic | Yes | Apr 1, 2022 |
| Arsenic | Yes | Apr 1, 2022 |
| Arsenic | Yes | Jan 1, 2022 |
| Arsenic | Yes | Oct 1, 2021 |
Frequently Asked Questions
What does EPA SDWIS list for OAKLEY MUTUAL WATER COMPANY?
How many people does OAKLEY MUTUAL WATER COMPANY serve?
What violations does OAKLEY MUTUAL WATER COMPANY have?
What contaminants have been found in OAKLEY MUTUAL WATER COMPANY water?
Compare beyond California
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest OAKLEY MUTUAL WATER COMPANY on cumulative violation count (29) and EPA-reported population served (170). Violation-count peers include EAST LOGAN CO RURAL WATER, BIG PARK WATER COMPANY, CAMP INN ASSOCIATES, LLC.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
OAKLEY MUTUAL WATER COMPANY (CA0706004) is drawn from EPA SDWIS. Nearby county systems in this extract include CONTRA COSTA WATER DISTRICT; CITY OF ANTIOCH; BRENTWOOD; CITY OF PITTSBURG. Health-based rows (29 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.