Thermal, California Water Quality Report
Water quality data for 9 water systems serving 2,880 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (12)
75
Apr 1, 2025
75
Mar 1, 2025
75
Feb 1, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
45
Jun 20, 2024
75
Apr 1, 2024
66
Oct 29, 2022
45
May 1, 2021
45
May 1, 2021
45
Mar 31, 2021
45
Mar 31, 2021
Resolved Violations (488)
3A
Sep 1, 2025 — Sep 30, 2025
3A
Jul 1, 2025 — Jul 31, 2025
03
Jul 1, 2025 — Sep 30, 2025
27
Jul 1, 2025 — Sep 30, 2025
4B
Jun 1, 2025
+ 483 more resolved violations
Frequently Asked Questions
Is Thermal tap water safe to drink?
Thermal'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 Thermal tap water?
0 contaminants have been detected in Thermal's water supply across 9 water systems. See the full contaminant table above for details.
How can I improve my water quality in Thermal?
Install a water filter rated for the specific contaminants found in Thermal's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Thermal have any water quality violations?
Yes, Thermal currently has 471 active violations. See the violations section above for details.