Public water system record
Prunedale MWC
Serves Prunedale, Monterey County, CA · 277 people served
Federal records show 2 health-based violations and no monitoring/reporting issues for Prunedale MWC in the last ten years. The most serious issue in this window was a resolved Arsenic violation.
System profile
- Health-based violations, last 10 years
- 2
- Resolved
- 2
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 0
Key facts
- Prunedale MWC draws water from 3 wells.
- Highest measured level in the last 10 years: Arsenic, 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit), 2022.
- Most recent formal enforcement: compliance order (no penalty) by California, February 2023.
- Record on file since 1980, with 11 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 111 service lines.
Check whether Prunedale 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 |
|---|---|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.02 mg/L, federal limit 0.01 mg/L (2 times the limit)
|
330 | Oct 1, 2022 | Resolved | No |
|
Arsenic
Contaminant limit exceeded
Measured 0.011 mg/L, federal limit 0.01 mg/L (1.1 times the limit)
|
330 | Jul 1, 2022 | Resolved | No |
Full record since 1980
EPA's records for Prunedale MWC go back to 1980. Before October 19, 2016 they list 11 health-based violations (10 resolved, 1 archived by EPA without a recorded fix) and 21 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 2 |
| 1990s | 3 | 2 |
| 2000s | 5 | 14 |
| 2010 to October 18, 2016 | 3 | 3 |
| 2020s | 2 | 0 |
Most recent health-based violation before October 19, 2016: Arsenic, began July 2014, Resolved.
Show all 11 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Arsenic
Contaminant limit exceeded
Measured 0.047 mg/L, federal limit 0.01 mg/L (4.7 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)
|
Jul 1, 2013 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.013 mg/L, federal limit 0.01 mg/L (1.3 times the limit)
|
Apr 1, 2013 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Feb 1, 2009 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0118 mg/L, federal limit 0.01 mg/L (1.2 times the limit)
|
Jan 1, 2008 | Resolved |
|
Arsenic
Contaminant limit exceeded
Measured 0.0417 mg/L, federal limit 0.01 mg/L (4.2 times the limit)
|
Oct 1, 2006 | Resolved |
|
Arsenic
Contaminant limit exceeded
|
Sep 1, 2004 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Dec 1, 2003 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1999 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1999 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 1999 | Resolved |
Enforcement actions
California regulators took 2 formal enforcement actions against Prunedale MWC and issued 2 boil water orders between 2013 and 2023, filed as 5 records in EPA's data. The most recent was a compliance order (no penalty) in February 2023.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Feb 14, 2023 | California | Compliance order (no penalty) | 2 violations (2 health-based): Arsenic |
| Feb 5, 2015 | California | Boil water order | 6 violations (3 health-based): Arsenic, Total Coliform |
| Sep 19, 2014 | California | Compliance order (no penalty) | 4 violations (3 health-based): Arsenic |
| Oct 3, 2013 | California | Boil water order | 1 violation (1 health-based): Arsenic |
What the violations mean
Arsenic
2 incidentsArsenic exceeded the federal limit
Long-term arsenic exposure is linked to cancer and cardiovascular effects
Where the water comes from
Prunedale MWC draws water from 3 wells.
Annual water quality report
Prunedale 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 Prunedale 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