A86/100
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER — Water Quality Report 2026
Serving 208,129 people · California
Water Source
Purchased Surface Water
County
—
System ID
CA1910070
Violations
4
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
chlorate | 260.00 µg/L | — | Above Goal |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2007.
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 LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER
Is LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER water safe to drink?
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER water receives a grade of A (86/100), which is considered excellent. Out of 76 contaminants tested, none exceed EPA legal limits. 2 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER detected?
76 contaminants were tested in LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER's water. Notable contaminants include Lead (90th percentile), chlorate. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER have any EPA violations?
Yes, LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER has 4 EPA violation(s) on record, with the most recent in 2007. Violation types include MR, MCL. 1 are health-based violations.
How many people does LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER serve?
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER serves approximately 208,129 people, California.
What type of water does LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER provide?
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is CA1910070.
How does LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER compare to other utilities in California?
LOS ANGELES CWWD 40 REG 4 & 34 LANCASTER scores 86/100 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.