C42/100
MOUNTAIN GATE C.S.D. — Water Quality Report 2026
Serving 2,227 people · California
Water Source
Surface Water
County
—
System ID
CA4510002
Violations
11
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 111.90 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
2
Unresolved
1
Health-Related
TIER 3Unresolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 2Unresolved
Treatment technique violation
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 MOUNTAIN GATE C.S.D.
Is MOUNTAIN GATE C.S.D. water safe to drink?
MOUNTAIN GATE C.S.D. water receives a grade of C (42/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 11 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MOUNTAIN GATE C.S.D. detected?
2 contaminants were tested in MOUNTAIN GATE C.S.D.'s water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does MOUNTAIN GATE C.S.D. have any EPA violations?
Yes, MOUNTAIN GATE C.S.D. has 11 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MCL. 9 are health-based violations.
How many people does MOUNTAIN GATE C.S.D. serve?
MOUNTAIN GATE C.S.D. serves approximately 2,227 people, California.
What type of water does MOUNTAIN GATE C.S.D. provide?
MOUNTAIN GATE C.S.D. 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 CA4510002.
How does MOUNTAIN GATE C.S.D. compare to other utilities in California?
MOUNTAIN GATE C.S.D. scores 42/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our California state page for a full comparison of water systems.