Public water system record
Tud - Tuolumne Water System
Serves Sonora and Tuolumne City, Tuolumne County, CA · 1,761 people served
Federal records show no health-based violations and 1 monitoring/reporting issue for Tud - Tuolumne Water System in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Tud - Tuolumne Water System draws water from 1 surface water intake.
- Record on file since 1980, with 0 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 0 unknown out of 725 service lines.
Check whether Tud - Tuolumne 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Apr 1, 2025 | Resolved |
Full record since 1980
EPA's records for Tud - Tuolumne Water System go back to 1980. Before October 19, 2016 they list no health-based violations and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 1 |
| 2020s | 0 | 1 |
Where the water comes from
Tud - Tuolumne Water System draws water from 1 surface water intake. 1 other community water system buys water from Tud - Tuolumne Water System.
Community systems that buy water from it
- Tuolumne Me-Wuk Ridgeline Tuolumne, CA
Annual water quality report
Tud - Tuolumne 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.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
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