A98/100
Seal Beach Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 24,937 residents · California
What's In Seal Beach's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2020.
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
CITY OF SEAL BEACH
Population Served
24,937
Water Source
Purchased Surface Water
System ID
CA3010041
Frequently Asked Questions About Seal Beach Water
Is Seal Beach tap water safe to drink?
Seal Beach, California tap water receives a grade of A (98/100), which is considered excellent. Out of 69 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Seal Beach's water?
69 contaminants were tested in Seal Beach's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Seal Beach have any water quality violations?
Yes, Seal Beach has 2 EPA violation(s) on record, with the most recent in 2020. Violation types include MR, MON. None of these are classified as health-based violations.
Do I need a water filter in Seal Beach?
Seal Beach water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. All contaminants are within health goals.
Where does Seal Beach's tap water come from?
Seal Beach's drinking water is sourced from purchased surface water and supplied by CITY OF SEAL BEACH. The system serves approximately 24,937 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Seal Beach'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. Seal Beach'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 Seal Beach's water compare to other cities in California?
Seal Beach's water quality score of 98/100 earns a grade of A, which is considered excellent. This places Seal Beach 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 Seal Beach's water quality?
If you have concerns about Seal Beach'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 (CITY OF SEAL BEACH) 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.