Public water system record
Las Cumbres Mutual Water Co
Serves an area of Santa Cruz County, CA · 402 people served
Federal records show 38 health-based violations and 5 monitoring/reporting issues for Las Cumbres Mutual Water Co in the last ten years. The most serious issue in this window was a resolved Surface Water Treatment Rule violation.
System profile
Source water
Surface water
ZIP
95033
EPA system ID
CA4400631
- Health-based violations, last 10 years
- 38
- Resolved
- 38
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 5
Key facts
- Las Cumbres Mutual Water Co draws water from 4 wells and 3 springs (1 of them for emergency, seasonal or other part-time use).
- Most recent formal enforcement: compliance order (no penalty) by California, September 2025.
- Record on file since 1980, with 103 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 124 service lines.
Check whether Las Cumbres 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 |
|---|---|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Nov 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Nov 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | May 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2016 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Dec 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Nov 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | May 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2015 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Dec 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Nov 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | May 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2014 | Resolved | No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2012 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Jul 1, 2025 | Resolved |
|
E. coli
Monitoring and reporting
|
Jun 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
May 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Mar 1, 2018 | Resolved |
Full record since 1980
EPA's records for Las Cumbres Mutual Water Co go back to 1980. Before October 19, 2016 they list 103 health-based violations (103 resolved) and 12 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 6 |
| 1990s | 0 | 1 |
| 2000s | 0 | 4 |
| 2010 to October 18, 2016 | 103 | 1 |
| October 19, 2016 to 2019 | 2 | 4 |
| 2020s | 0 | 1 |
Most recent health-based violation before October 19, 2016: Surface Water Treatment Rule, began October 2016, Resolved.
Show all 103 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Apr 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Apr 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 2016 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
May 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Apr 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Apr 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 2015 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 2014 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 2014 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 2014 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 2014 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2014 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2014 | Resolved |
53 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
California regulators took 9 formal enforcement actions against Las Cumbres Mutual Water Co between 2003 and 2025. The most recent was a compliance order (no penalty) in September 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 9, 2025 | California | Compliance order (no penalty) | 1 violation: Revised Total Coliform Rule |
| Apr 21, 2015 | California | Compliance order (no penalty) | 44 violations (44 health-based): Surface Water Treatment Rule |
| Nov 14, 2014 | California | Compliance order (no penalty) | 2 violations (2 health-based): Surface Water Treatment Rule |
| Dec 16, 2013 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Oct 15, 2013 | California | Compliance order (no penalty) | 26 violations (26 health-based): Surface Water Treatment Rule |
| Sep 16, 2013 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Aug 15, 2013 | California | Compliance order (no penalty) | 1 violation (1 health-based): Surface Water Treatment Rule |
| Jul 1, 2013 | California | Compliance order (no penalty) | 5 violations (5 health-based): Surface Water Treatment Rule |
| Dec 30, 2003 | California | Compliance order (no penalty) | 25 violations (25 health-based): Surface Water Treatment Rule |
What the violations mean
Surface Water Treatment Rule
38 incidentsThe system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Las Cumbres Mutual Water Co draws water from 4 wells and 3 springs (1 of them for emergency, seasonal or other part-time use).
Annual water quality report
Las Cumbres 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.
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 Las Cumbres Mutual Water Co 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