A89/100
MISSION HILLS CSD — Water Quality Report 2026
Serving 3,600 people · California
Water Source
Groundwater
County
—
System ID
CA4210019
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.70 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2017.
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 MISSION HILLS CSD
Is MISSION HILLS CSD water safe to drink?
MISSION HILLS CSD water receives a grade of A (89/100), which is considered excellent. Out of 32 contaminants tested, 1 exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MISSION HILLS CSD detected?
32 contaminants were tested in MISSION HILLS CSD's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does MISSION HILLS CSD have any EPA violations?
Yes, MISSION HILLS CSD has 3 EPA violation(s) on record, with the most recent in 2017. Violation types include MON, MR.
How many people does MISSION HILLS CSD serve?
MISSION HILLS CSD serves approximately 3,600 people, California.
What type of water does MISSION HILLS CSD provide?
MISSION HILLS CSD sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA4210019.
How does MISSION HILLS CSD compare to other utilities in California?
MISSION HILLS CSD scores 89/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our California state page for a full comparison of water systems.