B79/100
Westlake Village Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 13,898 residents · California
What's In Westlake Village'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 2004.
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
TRIUNFO WATER & SANITATION DISTRICT
Population Served
13,898
Water Source
Purchased Surface Water
System ID
CA5610043
Frequently Asked Questions About Westlake Village Water
Is Westlake Village tap water safe to drink?
Westlake Village, California tap water receives a grade of B (79/100), which is considered good. 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 Westlake Village's water?
69 contaminants were tested in Westlake Village's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Westlake Village have any water quality violations?
Yes, Westlake Village has 5 EPA violation(s) on record, with the most recent in 2004. Violation types include MCL, MR. 4 of these are health-based violations, which are the most serious category.
Do I need a water filter in Westlake Village?
Westlake Village 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 Westlake Village's tap water come from?
Westlake Village's drinking water is sourced from purchased surface water and supplied by TRIUNFO WATER & SANITATION DISTRICT. The system serves approximately 13,898 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Westlake Village'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. Westlake Village'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 Westlake Village's water compare to other cities in California?
Westlake Village's water quality score of 79/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our California state page to see how all cities in the state compare.
What should I do if I'm concerned about Westlake Village's water quality?
If you have concerns about Westlake Village'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 (TRIUNFO WATER & SANITATION DISTRICT) 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.