CHICO, CA · Butte County
GRAN MUTUAL WATER CO Water System
Consumer Confidence Report status
GRAN MUTUAL WATER CO 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 GRAN MUTUAL WATER CO.
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)
- CA0400008
- System type
- Community Water System
- Population served
- 290
- Service connections
- 91
- Ownership
- privately owned
- Water source
- groundwater (wells)
GRAN MUTUAL WATER CO is one of 3,951 community water systems in California in the 500 or fewer people size category, serving 290 people from groundwater.
As of August 1, 2026, its federal record holds 1 entry in 1981, all of which EPA lists as closed. Nothing has been added since 1981.
All 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 Radionuclides and Revised Rad Rule.
Violation history
Monitoring, 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 |
|---|---|---|---|---|
| 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
- October 24, 2025State Compliance achieved3 linked violations
- February 5, 2015State Violation/Reminder Notice1 linked violation
- February 5, 2015State Compliance achieved1 linked violation
- November 30, 2014State Compliance achieved2 linked violations
- September 12, 2008State Violation/Reminder Notice57 linked violations
Common questions
Is GRAN MUTUAL WATER CO required to publish a Consumer Confidence Report?
- Yes. GRAN MUTUAL WATER CO 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 GRAN MUTUAL WATER CO’s next Consumer Confidence Report due?
- GRAN MUTUAL WATER CO’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does GRAN MUTUAL WATER CO have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for GRAN MUTUAL WATER CO.
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
WILSON, LOGAN
530-895-3919
CHICO, CA 95973