Public water system record
Aptos Hills Mutual Water Co
Serves Aptos Hills-Larkin Valley, Santa Cruz County, CA · 32 people served
Federal records show 1 health-based violation and no monitoring/reporting issues for Aptos Hills Mutual Water Co in the last ten years. The most serious issue in this window was a Nitrate violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 0
Key facts
- Aptos Hills Mutual Water Co draws water from 2 wells.
- Highest measured level in the last 10 years: Nitrate, 10.05 mg/L, federal limit 10 mg/L (at or just above the limit), 2024.
- Most recent formal enforcement: compliance order (no penalty) by California, April 2024.
- Record on file since 1980, with 2 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 11 service lines.
Check whether Aptos Hills 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 |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 10.05 mg/L, federal limit 10 mg/L (at or just above the limit)
|
330 | Mar 20, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
Full record since 1980
EPA's records for Aptos Hills Mutual Water Co go back to 1980. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 12 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 7 |
| 2000s | 2 | 5 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform, began January 2009, Resolved.
Show all 2 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Jan 1, 2009 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2008 | Resolved |
Enforcement actions
California regulators took 1 formal enforcement action against Aptos Hills Mutual Water Co in 2024. The most recent was a compliance order (no penalty) in April 2024.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Apr 19, 2024 | California | Compliance order (no penalty) | 1 violation (1 health-based): Nitrate |
What the violations mean
Nitrate
1 incidentNitrate exceeded the federal limit
High nitrate is especially dangerous for infants under 6 months and can cause blue baby syndrome
Where the water comes from
Aptos Hills Mutual Water Co draws water from 2 wells.
Annual water quality report
Aptos Hills 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 Aptos Hills 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