Santa Rosa, California Water Quality Report
Water quality data for 55 water systems serving 186,393 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 96.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 960% | Above guideline |
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Compliance & Violations
Active Violations (22)
4H
Jul 2, 2025
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
52
Jan 1, 2024
52
Jan 1, 2024
52
Jan 1, 2024
52
Jan 1, 2023
52
Oct 1, 2022
52
Jun 1, 2021
42
Apr 1, 2019
Resolved Violations (511)
42
Feb 1, 2023
42
Feb 1, 2023
52
Jun 1, 2022
52
Jun 1, 2022
52
Jun 1, 2022
+ 506 more resolved violations
Frequently Asked Questions
Is Santa Rosa tap water safe to drink?
Santa Rosa's water meets all EPA maximum contaminant levels. However, 1 contaminants were detected at various levels. Some residents may prefer additional filtration for peace of mind.
What contaminants are in Santa Rosa tap water?
1 contaminants have been detected in Santa Rosa's water supply across 55 water systems. See the full contaminant table above for details.
How can I improve my water quality in Santa Rosa?
Install a water filter rated for the specific contaminants found in Santa Rosa's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Santa Rosa have any water quality violations?
Yes, Santa Rosa currently has 77 active violations. See the violations section above for details.