Public water system record
Rancho De Lomas Mutual Water Company
On record as serving Santa Clara County, CA · Serves 35 people
Federal records show 1 health-based violation and no monitoring/reporting issues for Rancho De Lomas Mutual Water Company 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
- Rancho De Lomas Mutual Water Company draws water from 1 well.
- Highest measured level in the last 10 years: Nitrate, 12 mg/L, federal limit 10 mg/L (1.2 times the limit), 2025.
- Most recent formal enforcement: compliance order with a penalty by California, September 2025.
Check whether Rancho De Lomas 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 |
|---|---|---|---|---|
|
Nitrate
Contaminant limit exceeded
Measured 12 mg/L, federal limit 10 mg/L (1.2 times the limit)
|
330 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
Enforcement actions
California regulators took 1 formal enforcement action against Rancho De Lomas Mutual Water Company in 2025. The most recent was a compliance order with a penalty in September 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Sep 4, 2025 | California | Compliance order with a 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
Rancho De Lomas Mutual Water Company draws water from 1 well.
Annual water quality report
Rancho De Lomas 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 Rancho De Lomas 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