Lancaster, California Water Quality Report
Water quality data for 21 water systems serving 8,496 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (4)
4H
Jul 2, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
52
Oct 1, 2024
Resolved Violations (496)
3A
Sep 1, 2025 — Sep 30, 2025
02
Apr 1, 2025 — Jun 30, 2025
3A
Feb 1, 2025 — Feb 28, 2025
02
Jan 1, 2025 — Mar 31, 2025
02
Jan 1, 2025 — Mar 31, 2025
+ 491 more resolved violations
Frequently Asked Questions
Is Lancaster tap water safe to drink?
Lancaster's water meets all EPA maximum contaminant levels. However, 0 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Lancaster tap water?
0 contaminants have been detected in Lancaster's water supply across 21 water systems. See the full contaminant table above for details.
How can I improve my water quality in Lancaster?
Install a water filter rated for the specific contaminants found in Lancaster's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Lancaster have any water quality violations?
Yes, Lancaster currently has 29 active violations. See the violations section above for details.