St. Helena, California Water Quality Report
Water quality data for 4 water systems serving 6,328 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 75.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 750% | Above guideline |
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in St. Helena, California.
Get Water Quality Alerts
Be the first to know when water quality changes in St. Helena.
Compliance & Violations
Active Violations (6)
52
Oct 1, 2022
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Violation
Unknown
Resolved Violations (94)
02
Jul 1, 2023 — Sep 30, 2023
02
Apr 1, 2023 — Jun 30, 2023
02
Jan 1, 2023 — Mar 31, 2023
52
Oct 1, 2022
52
Oct 1, 2021
+ 89 more resolved violations
Frequently Asked Questions
Is St. Helena tap water safe to drink?
St. Helena'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 St. Helena tap water?
1 contaminants have been detected in St. Helena's water supply across 4 water systems. See the full contaminant table above for details.
How can I improve my water quality in St. Helena?
Install a water filter rated for the specific contaminants found in St. Helena's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does St. Helena have any water quality violations?
Yes, St. Helena currently has 6 active violations. See the violations section above for details.