Cheyenne, Wyoming Water Quality Report
Water quality data for 25 water systems serving 77,777 people.
Water Source
Detected Contaminants
| Contaminant | Detected Level | EPA Limit (MCL) | Health Guideline | % of Limit | Status |
|---|---|---|---|---|---|
| lithium | 9.6 | No federal limit | 10.0 ug/L(EPA/USGS HBSL) | 96% | Near guideline |
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Compliance & Violations
Active Violations (7)
71
Jul 1, 2025
66
Dec 30, 2023
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2016
71
Jul 1, 2015
71
Jul 1, 2015
Resolved Violations (493)
1A
Aug 1, 2025 — Aug 31, 2025
27
Jan 1, 2025 — Dec 31, 2025
27
Jan 1, 2025 — Dec 31, 2025
27
Sep 1, 2024 — Sep 30, 2024
71
Jul 1, 2024
+ 488 more resolved violations
Frequently Asked Questions
Is Cheyenne tap water safe to drink?
Cheyenne'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 Cheyenne tap water?
1 contaminants have been detected in Cheyenne's water supply across 25 water systems. See the full contaminant table above for details.
How can I improve my water quality in Cheyenne?
Install a water filter rated for the specific contaminants found in Cheyenne's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Cheyenne have any water quality violations?
Yes, Cheyenne currently has 46 active violations. See the violations section above for details.