A86/100
Covina Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 336,030 residents · California
What's In Covina's Tap Water?
76
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: April 1, 2022 – April 30, 2022Rule: Total Coliform RuleEnforcement: 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
Water Utility Details
SUBURBAN WATER SYSTEMS-GLENDORA
Population Served
5,249
Water Source
Purchased Surface Water
System ID
CA1910046
SUBURBAN WATER SYSTEMS-LA MIRADA
Population Served
56,793
Water Source
Groundwater
System ID
CA1910059
COVINA-CITY, WATER DEPT.
Population Served
33,300
Water Source
Purchased Surface Water
System ID
CA1910127
SUBURBAN WATER SYSTEMS - SATIVA
Population Served
4,363
Water Source
Purchased Surface Water
System ID
CA1910147
SUBURBAN WATER SYSTEMS-WHITTIER
Population Served
66,045
Water Source
Groundwater
System ID
CA1910174
SUBURBAN WATER SYSTEMS-COVINA KNOLLS
Population Served
1,437
Water Source
Purchased Surface Water
System ID
CA1910200
SUBURBAN WATER SYSTEMS-SAN JOSE
Population Served
168,843
Water Source
Purchased Surface Water
System ID
CA1910205
Frequently Asked Questions About Covina Water
Is Covina tap water safe to drink?
Covina, California tap water receives a grade of A (86/100), which is considered excellent. Out of 76 contaminants tested, 2 exceed EPA maximum contaminant levels (MCLs) and 4 exceed health guidelines (MCLGs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Covina's water?
Of the 76 contaminants tested in Covina's water supply, the most notable include PFOS, PFOA, chlorate, 1,4-dioxane. 2 contaminant(s) exceed EPA legal limits (MCLs). 4 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Covina have any water quality violations?
Yes, Covina has 23 EPA violation(s) on record, with the most recent in 2022. Violation types include MON, RPT, MR. 10 of these are health-based violations, which are the most serious category.
Do I need a water filter in Covina?
Based on EPA data, using a water filter in Covina is recommended. 2 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Covina's tap water come from?
Covina's drinking water is sourced from purchased surface water and supplied by SUBURBAN WATER SYSTEMS-GLENDORA and 6 other water system(s). The system serves approximately 336,030 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Covina's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Covina's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Covina's water compare to other cities in California?
Covina's water quality score of 86/100 earns a grade of A, which is considered excellent. This places Covina among the better-performing water systems in California. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Covina's water quality?
If you have concerns about Covina's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (SUBURBAN WATER SYSTEMS-GLENDORA) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.