SONORA, CA · Tuolumne County
TUD - BIG HILL WATER SYSTEM Water System
Inactive system
This water system is marked inactive in EPA’s federal records as of February 20, 2015. It is no longer an operating public water system under this PWSID, and no compliance deadlines — including the 2027 Consumer Confidence Report rule — apply to it.
If you are a resident looking for your current water provider, see water systems in Tuolumne County, CA.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace California’s official records. Always confirm current status with California before making decisions based on this information.
System facts
- System ID (PWSID)
- CA5510029
- System type
- Community Water System
- Population served
- 531
- Service connections
- 226
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
TUD - BIG HILL WATER SYSTEM is one of 728 community water systems in California in the 501 to 3,300 people size category, formerly serving 531 people from surface water.
EPA's federal records list this system as inactive in 2015; the record below is historical.
As of August 1, 2026, its federal record holds 1 entry in 2000, all of which EPA lists as closed. Nothing has been added since 2000.
None of the 1 are monitoring or reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset; these involve water-quality, treatment, or public-notice findings instead. The record involves the Surface Water Treatment Rules.
Violation history
Treatment Technique (SWTR and GWR)
Health-basedSurface Water Treatment Rule
October 1, 2000 – October 31, 2000
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 1, 2000 – October 31, 2000 | Treatment Technique (SWTR and GWR) | Surface Water Treatment Rule | Health-based | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- February 22, 2006State Compliance achieved1 linked violation
- September 23, 2002State Compliance achieved1 linked violation
- May 31, 2002State Violation/Reminder Notice1 linked violation
- May 19, 2000State Administrative/Compliance Order without penalty issued22 linked violations
- September 1, 1998State Administrative/Compliance Order without penalty issued8 linked violations
- May 23, 1996State Compliance achieved8 linked violations
- May 23, 1996State Compliance achieved17 linked violations
Last known contact on file (system is inactive)
PERKINS, DON
209-532-5536
SONORA, CA 95370