Ontario, New York Water Quality Report
Water quality data for 2 water systems serving 10,158 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (6)
52
Oct 1, 2020
52
Oct 1, 2020
52
Oct 1, 2020
52
Oct 1, 2017
52
Oct 1, 2017
52
Oct 1, 2017
Resolved Violations (494)
3A
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
3A
Jun 1, 2025 — Jun 30, 2025
3A
Nov 1, 2024 — Nov 30, 2024
3A
Nov 1, 2024 — Nov 30, 2024
+ 489 more resolved violations
Frequently Asked Questions
Is Ontario tap water safe to drink?
Ontario'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 Ontario tap water?
0 contaminants have been detected in Ontario's water supply across 2 water systems. See the full contaminant table above for details.
How can I improve my water quality in Ontario?
Install a water filter rated for the specific contaminants found in Ontario's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Ontario have any water quality violations?
Yes, Ontario currently has 165 active violations. See the violations section above for details.