Public water system record
Loch Haven Mutual Water Company
Serves an area of Sonoma County, CA · 26 people served
Federal records show 5 health-based violations and no monitoring/reporting issues for Loch Haven Mutual Water Company in the last ten years. The most serious issue in this window was a resolved Arsenic violation.
System profile
Source water
Groundwater
ZIP
95404
EPA system ID
CA4900575
- Health-based violations, last 10 years
- 5
- Resolved
- 5
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Loch Haven Mutual Water Company draws water from 2 wells.
- Highest measured level in the last 10 years: Arsenic, 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit), 2017.
- Most recent formal enforcement: compliance order (no penalty) by California, November 2015.
- Record on file since 1980, with 40 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 11 service lines.
Check whether Loch Haven Mutual Water Company 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 |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.0165 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Oct 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jul 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.01675 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Apr 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.0165 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
330 | Jan 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.01525 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
330 | Oct 1, 2016 | Resolved | No |
Full record since 1980
EPA's records for Loch Haven Mutual Water Company go back to 1980. Before October 19, 2016 they list 40 health-based violations (40 resolved) and 16 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 4 |
| 1990s | 1 | 9 |
| 2000s | 14 | 2 |
| 2010 to October 18, 2016 | 25 | 1 |
| October 19, 2016 to 2019 | 4 | 0 |
Most recent health-based violation before October 19, 2016: Arsenic, began October 2016, Resolved.
Show all 40 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.01525 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
Oct 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01275 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Jul 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 12.5 µg/L, federal limit 10 µg/L (1.3 times the limit)
|
Apr 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jan 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.012 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.014 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
Jul 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Apr 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.01525 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
Oct 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0135 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 14.75 µg/L, federal limit 10 µg/L (1.5 times the limit)
|
Apr 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 12.4 µg/L, federal limit 10 µg/L (1.2 times the limit)
|
Jan 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 11.76 µg/L, federal limit 10 µg/L (1.2 times the limit)
|
Oct 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 10.74 µg/L, federal limit 10 µg/L (1.1 times the limit)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.010188 mg/L, federal limit 0.01 mg/L (at or just above the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 10.97 µg/L, federal limit 10 µg/L (1.1 times the limit)
|
Jan 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.010725 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
Oct 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0117 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Apr 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0132 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0154 mg/L, federal limit 0.01 mg/L (1.5 times the limit)
|
Oct 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jul 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0186 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.032 mg/L, federal limit 0.01 mg/L (3.2 times the limit)
|
Oct 1, 2010 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0139 mg/L, federal limit 0.01 mg/L (1.4 times the limit)
|
Oct 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jul 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2009 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
May 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Apr 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jan 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Oct 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jul 1, 2008 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
May 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Apr 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.025 mg/L, federal limit 0.01 mg/L (2.5 times the limit)
|
Jan 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.025 mg/L, federal limit 0.01 mg/L (2.5 times the limit)
|
Oct 1, 2007 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Aug 1, 2006 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jan 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1997 | Resolved |
Enforcement actions
California regulators took 12 formal enforcement actions against Loch Haven Mutual Water Company between 2000 and 2015. The most recent was a compliance order (no penalty) in November 2015.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 5, 2015 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jun 3, 2015 | California | Compliance order (no penalty) | 37 violations (36 health-based): Arsenic |
| Mar 30, 2011 | California | Compliance order (no penalty) | 1 violation: Arsenic |
| Dec 21, 2010 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Aug 31, 2009 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jun 25, 2009 | California | Compliance order with a penalty | 1 violation (1 health-based): Total Coliform |
| Jun 2, 2009 | California | Compliance order (no penalty) | 1 violation (1 health-based): Arsenic |
| Dec 31, 2008 | California | Compliance order (no penalty) | 25 violations (25 health-based): Arsenic |
| Jul 8, 2008 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Sep 28, 2006 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Dec 23, 2004 | California | Compliance order (no penalty) | 2 violations (1 health-based): Total Coliform |
| Dec 22, 2000 | California | Compliance order (no penalty) | 1 violation: Total Coliform |
What the violations mean
Arsenic
5 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Loch Haven Mutual Water Company draws water from 2 wells.
Annual water quality report
Loch Haven Mutual Water Company 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 Loch Haven Mutual Water Company 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