Public water system record
Maher Mutual Water Company
Serves Rosedale, Kern County, CA · 140 people served
Federal records show 11 health-based violations and 3 monitoring/reporting issues for Maher 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
93312
EPA system ID
CA1500378
- Health-based violations, last 10 years
- 11
- Resolved
- 11
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- Maher Mutual Water Company draws water from 1 well.
- Highest measured level in the last 10 years: Arsenic, 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit), 2019.
- Most recent formal enforcement: compliance order (no penalty) by California, February 2023.
- Record on file since 1980, with 40 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 51 service lines.
Check whether Maher 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 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
330 | Apr 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Jan 1, 2019 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
330 | Oct 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Jul 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Apr 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.022 mg/L, federal limit 0.01 mg/L (2.2 times the limit)
|
330 | Jan 1, 2018 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Oct 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Jul 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
330 | Apr 1, 2017 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
330 | Jan 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 | Oct 1, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Nitrate
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2015 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2013 | Resolved |
Full record since 1980
EPA's records for Maher Mutual Water Company go back to 1980. Before October 19, 2016 they list 40 health-based violations (39 resolved, 1 archived by EPA without a recorded fix) and 18 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 4 |
| 1990s | 4 | 4 |
| 2000s | 8 | 8 |
| 2010 to October 18, 2016 | 28 | 2 |
| October 19, 2016 to 2019 | 10 | 0 |
| 2020s | 0 | 1 |
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 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Oct 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jul 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
Apr 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jan 1, 2016 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Oct 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Jul 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.016 mg/L, federal limit 0.01 mg/L (1.6 times the limit)
|
Jan 1, 2015 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.017 mg/L, federal limit 0.01 mg/L (1.7 times the limit)
|
Oct 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Jul 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.022 mg/L, federal limit 0.01 mg/L (2.2 times the limit)
|
Jan 1, 2014 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Oct 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.024 mg/L, federal limit 0.01 mg/L (2.4 times the limit)
|
Apr 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.024 mg/L, federal limit 0.01 mg/L (2.4 times the limit)
|
Jan 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Oct 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.024 mg/L, federal limit 0.01 mg/L (2.4 times the limit)
|
Jul 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Apr 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Jan 1, 2012 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.023 mg/L, federal limit 0.01 mg/L (2.3 times the limit)
|
Oct 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jul 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.022 mg/L, federal limit 0.01 mg/L (2.2 times the limit)
|
Apr 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.022 mg/L, federal limit 0.01 mg/L (2.2 times the limit)
|
Jan 1, 2011 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Oct 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Jul 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Apr 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0205 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jan 1, 2010 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0203 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
Oct 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jul 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.019 mg/L, federal limit 0.01 mg/L (1.9 times the limit)
|
Apr 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.018 mg/L, federal limit 0.01 mg/L (1.8 times the limit)
|
Jan 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Oct 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.021 mg/L, federal limit 0.01 mg/L (2.1 times the limit)
|
Jul 1, 2008 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2002 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2000 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1999 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 1998 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 1997 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1997 | Resolved |
Enforcement actions
California regulators took 7 formal enforcement actions against Maher Mutual Water Company between 1999 and 2023. The most recent was a compliance order (no penalty) in February 2023.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 17, 2023 | California | Compliance order (no penalty) | 1 violation: Nitrate |
| May 26, 2015 | California | Compliance order (no penalty) | 18 violations (18 health-based): Arsenic |
| Jan 23, 2009 | California | Compliance order (no penalty) | 28 violations (26 health-based): Arsenic |
| Mar 7, 2007 | California | Compliance order (no penalty) | 4 violations: Consumer Confidence Rule |
| Apr 17, 2003 | California | Compliance order (no penalty) | 1 violation: Consumer Confidence Rule |
| Nov 29, 2000 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Jan 3, 1999 | California | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
What the violations mean
Arsenic
11 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Maher Mutual Water Company draws water from 1 well. It also has an emergency connection to Vaughn WC Inc.
Emergency or part-time connections to
- Vaughn WC Inc Bakersfield, CA
Annual water quality report
Maher 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 Maher 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