A83/100
MONROVIA-CITY, WATER DEPT. — Water Quality Report 2026
Serving 37,931 people · California
Water Source
Groundwater
County
—
System ID
CA1910090
Violations
1
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.006 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.005 µg/L | 0.004 µg/L | Over Limit |
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: May 1, 2023 – May 31, 2023Enforcement: Formal — state order issued
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 MONROVIA-CITY, WATER DEPT.
Is MONROVIA-CITY, WATER DEPT. water safe to drink?
MONROVIA-CITY, WATER DEPT. water receives a grade of A (83/100), which is considered excellent. Out of 66 contaminants tested, 2 exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has MONROVIA-CITY, WATER DEPT. detected?
66 contaminants were tested in MONROVIA-CITY, WATER DEPT.'s water. Notable contaminants include PFOS, PFOA. 2 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does MONROVIA-CITY, WATER DEPT. have any EPA violations?
Yes, MONROVIA-CITY, WATER DEPT. has 1 EPA violation(s) on record, with the most recent in 2023. Violation types include MR.
How many people does MONROVIA-CITY, WATER DEPT. serve?
MONROVIA-CITY, WATER DEPT. serves approximately 37,931 people, California. The system provides water to 1 community: Monrovia.
What type of water does MONROVIA-CITY, WATER DEPT. provide?
MONROVIA-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 CA1910090.
How does MONROVIA-CITY, WATER DEPT. compare to other utilities in California?
MONROVIA-CITY, WATER DEPT. scores 83/100 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.