Public water system record
Chamisal MWC
Serves an area of San Bernardino County, CA · 84 people served
Federal records show 1 health-based violation and 20 monitoring/reporting issues for Chamisal MWC 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
- 20
Key facts
- Chamisal MWC draws water from 1 well.
- Most recent formal enforcement: compliance order (no penalty) by California, October 2025.
- Record on file since 1993, with 0 health-based violations before October 19, 2016.
Check whether Chamisal MWC 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 |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 |
Active
Enforcement action in place
|
|
LEAD AND COPPER RULE REVISIONS
RPT
|
Oct 17, 2024 | Active |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2023 | Resolved |
|
Nitrate
Monitoring and reporting
|
Jan 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jan 1, 2023 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Dec 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Oct 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2022 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2022 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Jan 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Jan 1, 2022 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Sep 1, 2021 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
May 1, 2020 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2020 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2019 | Resolved |
Full record since 1993
EPA's records for Chamisal MWC go back to 1993. Before October 19, 2016 they list no health-based violations and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 0 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 19 |
Enforcement actions
California regulators took 13 formal enforcement actions against Chamisal MWC between 2020 and 2025, filed as 17 records in EPA's data. The most recent was a compliance order (no penalty) in October 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 22, 2025 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Apr 25, 2024 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Feb 22, 2024 | California | Compliance order (no penalty) | 3 violations: Nitrate, Nitrite, Consumer Confidence Rule |
| Apr 10, 2023 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Feb 28, 2023 | California | Compliance order (no penalty) | 2 violations: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Feb 23, 2023 | California | Compliance order (no penalty) | 1 violation: Nitrate |
| Jan 31, 2023 | California | Compliance order (no penalty) | 3 violations: Revised Total Coliform Rule |
| Oct 27, 2022 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Oct 26, 2022 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Oct 30, 2020 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Oct 26, 2020 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Jul 1, 2020 | California | Compliance order (no penalty) | 2 violations: Revised Total Coliform Rule |
| Jan 16, 2020 | 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
Chamisal MWC draws water from 1 well.
Annual water quality report
Chamisal MWC 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 Chamisal MWC 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