B76/100
MONTARA WATER AND SANITARY DISTRICT — Water Quality Report 2026
Serving 6,078 people · California
Water Source
Surface Water
County
—
System ID
CA4110010
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.60 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2010.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About MONTARA WATER AND SANITARY DISTRICT
Is MONTARA WATER AND SANITARY DISTRICT water safe to drink?
MONTARA WATER AND SANITARY DISTRICT water receives a grade of B (76/100), which is considered good. Out of 52 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MONTARA WATER AND SANITARY DISTRICT detected?
52 contaminants were tested in MONTARA WATER AND SANITARY DISTRICT's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does MONTARA WATER AND SANITARY DISTRICT have any EPA violations?
Yes, MONTARA WATER AND SANITARY DISTRICT has 4 EPA violation(s) on record, with the most recent in 2010. Violation types include MCL, MR. 3 are health-based violations.
How many people does MONTARA WATER AND SANITARY DISTRICT serve?
MONTARA WATER AND SANITARY DISTRICT serves approximately 6,078 people, California.
What type of water does MONTARA WATER AND SANITARY DISTRICT provide?
MONTARA WATER AND SANITARY DISTRICT sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA4110010.
How does MONTARA WATER AND SANITARY DISTRICT compare to other utilities in California?
MONTARA WATER AND SANITARY DISTRICT scores 76/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our California state page for a full comparison of water systems.