Billings, Montana Water Quality Report
Water quality data for 50 water systems serving 142,737 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 85.0 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 850% | Above guideline |
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Compliance & Violations
Active Violations (7)
72
Oct 1, 2025
72
Oct 1, 2025
71
Jul 1, 2025
66
Apr 1, 2025
66
Apr 1, 2025
4G
Oct 17, 2024
2E
Oct 17, 2024
Resolved Violations (493)
3A
Nov 1, 2025 — Nov 30, 2025
3A
Nov 1, 2025 — Nov 30, 2025
3A
Nov 1, 2025 — Nov 30, 2025
3A
Oct 1, 2025 — Oct 31, 2025
3A
Oct 1, 2025 — Oct 31, 2025
+ 488 more resolved violations
Frequently Asked Questions
Is Billings tap water safe to drink?
Billings'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 Billings tap water?
1 contaminants have been detected in Billings's water supply across 50 water systems. See the full contaminant table above for details.
How can I improve my water quality in Billings?
Install a water filter rated for the specific contaminants found in Billings's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Billings have any water quality violations?
Yes, Billings currently has 77 active violations. See the violations section above for details.