Johnstown, Colorado Water Quality Report
Water quality data for 1 water system serving 24,725 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (10)
Violation
Unknown
Violation
Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
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Unknown
Resolved Violations (284)
71
Jul 1, 2023
71
Jul 1, 2023
71
Jul 1, 2023
36
Aug 1, 2022 — Aug 31, 2022
36
Aug 1, 2022 — Aug 31, 2022
+ 279 more resolved violations
Frequently Asked Questions
Is Johnstown tap water safe to drink?
Johnstown'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 Johnstown tap water?
0 contaminants have been detected in Johnstown's water supply across 1 water system. See the full contaminant table above for details.
How can I improve my water quality in Johnstown?
Install a water filter rated for the specific contaminants found in Johnstown's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Johnstown have any water quality violations?
Yes, Johnstown currently has 10 active violations. See the violations section above for details.