Public water system record
Hemlock Mutual Water Co.
Serves El Monte, Los Angeles County, CA · 686 people served
Federal records show 1 health-based violation and 5 monitoring/reporting issues for Hemlock Mutual Water Co. 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
- 5
Key facts
- Hemlock Mutual Water Co. draws water from 2 wells.
- Most recent formal enforcement: compliance order (no penalty) by California, December 2024.
- Record on file since 1993, with 3 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 207 unknown out of 207 service lines.
Check whether Hemlock Mutual Water Co. 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 |
|
Public Notice
OTHER
|
Jul 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Jan 1, 2024 | Resolved |
|
Public Notice
OTHER
|
Oct 1, 2023 | Resolved |
|
Public Notice
OTHER
|
Jul 1, 2023 | Resolved |
Full record since 1993
EPA's records for Hemlock Mutual Water Co. go back to 1993. Before October 19, 2016 they list 3 health-based violations (3 resolved) and 30 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 2 |
| 2000s | 1 | 25 |
| 2010 to October 18, 2016 | 1 | 3 |
| 2020s | 1 | 5 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 2012, Resolved.
Show all 3 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2012 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1996 | Resolved |
Enforcement actions
California regulators took 3 formal enforcement actions against Hemlock Mutual Water Co. between 2012 and 2024. The most recent was a compliance order (no penalty) in December 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Dec 17, 2024 | California | Compliance order (no penalty) | 4 violations: Public Notice |
| Jan 15, 2013 | California | Compliance order with a penalty | 1 violation: Total Coliform |
| Oct 23, 2012 | California | Compliance order (no penalty) | 2 violations (1 health-based): Total Coliform, E. coli |
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
Hemlock Mutual Water Co. draws water from 2 wells.
Annual water quality report
Hemlock Mutual Water Co. 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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