Public water system record
City of Oakdale
Serves Oakdale, Stanislaus County, CA · 23,235 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for City of Oakdale in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- City of Oakdale draws water from 7 wells.
- Most recent formal enforcement: compliance order (no penalty) by EPA, January 2026.
- Record on file since 1988, with 4 health-based violations before October 19, 2016.
Check whether City of Oakdale serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 |
Active
Enforcement action in place
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 |
Active
Enforcement action in place
|
Full record since 1988
EPA's records for City of Oakdale go back to 1988. Before October 19, 2016 they list 4 health-based violations (4 resolved) and 5 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 4 |
| 1990s | 2 | 1 |
| 2000s | 2 | 0 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform, began August 2009, Resolved.
Show all 4 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2005 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 1995 | Resolved |
Enforcement actions
California regulators and EPA took 3 formal enforcement actions against City of Oakdale between 2005 and 2026. The most recent was a compliance order (no penalty) in January 2026.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Jan 29, 2026 | EPA | Compliance order (no penalty) | 2 violations (1 health-based): LEAD AND COPPER RULE REVISIONS |
| Aug 18, 2009 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Feb 15, 2005 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
What the violations mean
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
City of Oakdale draws water from 7 wells.
Annual water quality report
City of Oakdale must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by California.
Certified drinking water labs by state EPA guidance for private wells