Johnstown, Pennsylvania Water Quality Report
Water quality data for 7 water systems serving 81,025 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
Get a Free Water Quality Consultation
Connect with a certified water treatment professional in Johnstown, Pennsylvania.
Get Water Quality Alerts
Be the first to know when water quality changes in Johnstown.
Compliance & Violations
Active Violations (4)
75
Aug 10, 2021
75
Aug 10, 2021
75
Aug 10, 2021
75
Aug 10, 2021
Resolved Violations (496)
38
Sep 1, 2025 — Sep 30, 2025
38
Sep 1, 2025 — Sep 30, 2025
38
Sep 1, 2025 — Sep 30, 2025
27
Jul 1, 2025 — Sep 30, 2025
27
Jul 1, 2025 — Sep 30, 2025
+ 491 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 7 water systems. 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 84 active violations. See the violations section above for details.