MONTARA, CA · San Mateo County
MONTARA WATER AND SANITARY DISTRICT Water System
Consumer Confidence Report status
MONTARA WATER AND SANITARY DISTRICT 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 MONTARA WATER AND SANITARY DISTRICT.
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)
- CA4110010
- System type
- Community Water System
- Population served
- 6,078
- Service connections
- 1,698
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
MONTARA WATER AND SANITARY DISTRICT is one of 278 community water systems in California in the 3,301 to 10,000 people size category, serving 6,078 people from surface water.
As of August 1, 2026, its federal record holds 2 entries between 1996 and 2010, all of which EPA lists as closed. Nothing has been added since 2010.
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 inorganic chemicals.
Violation history
Maximum Contaminant Level Violation, Single Sample
Health-basedNitrate
June 1, 2010 – June 30, 2010
ResolvedMonitoring, Check/Repeat/Confirmation
—Nitrate
December 31, 1996 – December 1, 1997
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 2010 – June 30, 2010 | Maximum Contaminant Level Violation, Single Sample | Nitrate | Health-based | Resolved |
| December 31, 1996 – December 1, 1997 | Monitoring, Check/Repeat/Confirmation | Nitrate | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- July 16, 2010State Administrative/Compliance Order without penalty issued3 linked violations
- December 22, 1997State Compliance achieved2 linked violations
- June 28, 1993State Violation/Reminder Noticegeneral compliance action — not tied to a specific violation on record
Common questions
Is MONTARA WATER AND SANITARY DISTRICT required to publish a Consumer Confidence Report?
- Yes. MONTARA WATER AND SANITARY DISTRICT 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 MONTARA WATER AND SANITARY DISTRICT’s next Consumer Confidence Report due?
- MONTARA WATER AND SANITARY DISTRICT’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MONTARA WATER AND SANITARY DISTRICT have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MONTARA WATER AND SANITARY DISTRICT.
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
HELDMAIER, CLEMENS
650-728-3358
MONTARA, CA 94037