Public water system record
Colonia Santa Maria
Serves an area of Contra Costa County, CA · 32 people served
Federal records show 1 health-based violation and 3 monitoring/reporting issues for Colonia Santa Maria 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
- 3
Key facts
- Colonia Santa Maria draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, May 2024.
- Record on file since 1981, with 0 health-based violations before October 20, 2016.
Check whether Colonia Santa Maria 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 | 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 |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2023 |
Active
Enforcement action in place
|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
Full record since 1981
EPA's records for Colonia Santa Maria go back to 1981. Before October 20, 2016 they list no health-based violations and 9 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 8 |
| 1990s | 0 | 1 |
| October 20, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 2 |
Enforcement actions
California regulators took 2 formal enforcement actions against Colonia Santa Maria between 2018 and 2024. The most recent was a compliance order (no penalty) in May 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 31, 2024 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
| Aug 23, 2018 | California | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
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
Colonia Santa Maria draws water from 1 well.
Annual water quality report
Colonia Santa Maria 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 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Colonia Santa Maria for a copy.
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