RANCHO CUCAMONGA, CA · Tuolumne County
MONO VISTA RANCH MHP Water System
Consumer Confidence Report status
MONO VISTA RANCH MHP must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.
As of August 1, 2026, EPA's federal records show no open violations for MONO VISTA RANCH MHP.
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)
- CA5500124
- System type
- Community Water System
- Population served
- 105
- Service connections
- 30
- Ownership
- privately owned
- Water source
- groundwater (wells)
MONO VISTA RANCH MHP is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 105 people from groundwater.
As of August 1, 2026, its federal record holds 2 entries between 1981 and 1983, all of which EPA lists as closed. Nothing has been added since 1983.
Of the 2, 1 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Miscellaneous Other Rules and the Radionuclides and Revised Rad Rule.
Violation history
Notification, Public
—No contaminant on record
July 1, 1983 – July 31, 1983
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived
Archived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 1983 – July 31, 1983 | Notification, Public | — | — | Archived |
| October 1, 1981 – September 30, 1982 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Archived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- July 1, 2024State Compliance achieved5 linked violations
- February 20, 2002State Violation/Reminder Notice3 linked violations
- February 20, 2002State Public Notification requested6 linked violations
Common questions
Is MONO VISTA RANCH MHP required to publish a Consumer Confidence Report?
- Yes. MONO VISTA RANCH MHP is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.
When is MONO VISTA RANCH MHP’s next Consumer Confidence Report due?
- MONO VISTA RANCH MHP’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MONO VISTA RANCH MHP have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MONO VISTA RANCH MHP.
What is a Consumer Confidence Report?
- A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.
Contact
BARBA, VIVIANA
909-945-8888
RANCHO CUCAMONGA, CA 91729