COBB, CA · Lake County
LOCH LOMOND MUTUAL WATER CO Water System
Consumer Confidence Report status
LOCH LOMOND 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 1 open health-based violation for LOCH LOMOND 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)
- CA1700518
- System type
- Community Water System
- Population served
- 693
- Service connections
- 238
- Ownership
- privately owned
- Water source
- groundwater (wells)
LOCH LOMOND MUTUAL WATER CO is one of 728 community water systems in California in the 501 to 3,300 people size category, serving 693 people from groundwater.
As of August 1, 2026, its federal record holds 4 entries between 1981 and 2024, of which 1 health-based item remains open.
Of the 4, 2 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 Lead and Copper Rule, the Miscellaneous Other Rules, and the Radionuclides and Revised Rad Rule.
Violation history
LSL Inventory
Health-basedLEAD AND COPPER RULE REVISIONS
October 17, 2024
UnaddressedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2018 – January 14, 2020
ResolvedNotification, Public
—No contaminant on record
April 1, 1983 – April 30, 1983
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
October 1, 1981 – September 30, 1982
Archived
Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| October 17, 2024 | LSL Inventory | LEAD AND COPPER RULE REVISIONS | Health-based | Unaddressed |
| October 1, 2018 – January 14, 2020 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| April 1, 1983 – April 30, 1983 | Notification, Public | — | — | Archived |
| October 1, 1981 – September 30, 1982 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Unaddressed no corrective action on record yetResolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
- January 21, 2009State Compliance achieved3 linked violations
Common questions
Is LOCH LOMOND MUTUAL WATER CO required to publish a Consumer Confidence Report?
- Yes. LOCH LOMOND 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 LOCH LOMOND MUTUAL WATER CO’s next Consumer Confidence Report due?
- LOCH LOMOND MUTUAL WATER CO’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does LOCH LOMOND MUTUAL WATER CO have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show 1 open health-based violation for LOCH LOMOND 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
MURPHY, BENJAMIN
707-928-5262
COBB, CA 95426