Public water system record
Middletown Rancheria Community Water System
On record as serving Lake County, CA · Serves 487 people
Federal records show 1 health-based violation and 4 monitoring/reporting issues for Middletown Rancheria Community Water System in the last ten years, including an unresolved Groundwater Rule violation.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 4
Key facts
- Middletown Rancheria Community Water System buys its water from Callayomi County Water District.
- Lead pipe inventory: 0 lead and 0 unknown out of 47 service lines.
Check whether Middletown Rancheria Community Water System 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 |
|---|---|---|---|---|
|
Groundwater Rule
Treatment technique failure
|
140 | May 17, 2025 | Active | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2025 | Active |
|
Public Notice
OTHER
|
May 17, 2025 | Active |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2025 | Active |
|
Revised Total Coliform Rule
RPT
|
Feb 1, 2024 | Resolved |
What the violations mean
Groundwater Rule
1 incidentThe system did not complete a treatment step or action that the Groundwater Rule requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Middletown Rancheria Community Water System buys its water from Callayomi County Water District. It lists no wells or intakes of its own.
Buys water from
- Callayomi County Water District Middletown, CA
Annual water quality report
Middletown Rancheria Community Water System 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 Middletown Rancheria Community Water System 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 EPA Region 9.
Certified drinking water labs by state EPA guidance for private wells