A90/100
MONTEREY PARK-CITY, WATER DEPT. — Water Quality Report 2026
Serving 62,183 people · California
Water Source
Groundwater
County
—
System ID
CA1910092
Violations
3
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
1,4-dioxane | 0.840 µg/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 MONTEREY PARK-CITY, WATER DEPT.
Is MONTEREY PARK-CITY, WATER DEPT. water safe to drink?
MONTEREY PARK-CITY, WATER DEPT. water receives a grade of A (90/100), which is considered excellent. Out of 73 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MONTEREY PARK-CITY, WATER DEPT. detected?
73 contaminants were tested in MONTEREY PARK-CITY, WATER DEPT.'s water. Notable contaminants include 1,4-dioxane. No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MONTEREY PARK-CITY, WATER DEPT. have any EPA violations?
Yes, MONTEREY PARK-CITY, WATER DEPT. has 3 EPA violation(s) on record, with the most recent in 2024. Violation types include RPT, TT, MR. 1 are health-based violations.
How many people does MONTEREY PARK-CITY, WATER DEPT. serve?
MONTEREY PARK-CITY, WATER DEPT. serves approximately 62,183 people, California. The system provides water to 1 community: Monterey Park.
What type of water does MONTEREY PARK-CITY, WATER DEPT. provide?
MONTEREY PARK-CITY, WATER DEPT. sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is CA1910092.
How does MONTEREY PARK-CITY, WATER DEPT. compare to other utilities in California?
MONTEREY PARK-CITY, WATER DEPT. scores 90/100 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.