B74/100
La Crescenta Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 35,841 residents · California
What's In La Crescenta's Tap Water?
70
Contaminants Tested
1
Exceed EPA Limits
1
Above EPA Goals
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.76 mg/L | 1.30 mg/L | Over Limit |
chlorate | 220.00 µg/L | — | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 1996.
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
CRESCENTA VALLEY CWD
Population Served
35,841
Water Source
Purchased Surface Water
System ID
CA1910028
Frequently Asked Questions About La Crescenta Water
Is La Crescenta tap water safe to drink?
La Crescenta, California tap water receives a grade of B (74/100), which is considered good. Out of 70 contaminants tested, 1 exceed EPA maximum contaminant levels (MCLs) and 2 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 La Crescenta's water?
Of the 70 contaminants tested in La Crescenta's water supply, the most notable include Copper (90th percentile), chlorate. 1 contaminant(s) exceed EPA legal limits (MCLs). 2 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does La Crescenta have any water quality violations?
Yes, La Crescenta has 3 EPA violation(s) on record, with the most recent in 1996. Violation types include MCL. 3 of these are health-based violations, which are the most serious category.
Do I need a water filter in La Crescenta?
Based on EPA data, using a water filter in La Crescenta is recommended. 1 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 La Crescenta's tap water come from?
La Crescenta's drinking water is sourced from purchased surface water and supplied by CRESCENTA VALLEY CWD. The system serves approximately 35,841 people. Surface water sources include rivers, lakes, and reservoirs.
How often is La Crescenta'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. La Crescenta'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 La Crescenta's water compare to other cities in California?
La Crescenta's water quality score of 74/100 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 La Crescenta's water quality?
If you have concerns about La Crescenta'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 (CRESCENTA VALLEY CWD) 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.