Old Lyme, Connecticut Water Quality Report
Water quality data for 11 water systems serving 957 people.
Water Source
Detected Contaminants
No contaminant data available for this location.
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Compliance & Violations
Active Violations (29)
71
Jul 1, 2025
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
2E
Oct 17, 2024
4G
Oct 17, 2024
2E
Oct 17, 2024
52
Oct 1, 2024
52
Oct 1, 2024
72
Aug 10, 2024
34
Jul 30, 2020
34
Jul 30, 2020
34
Jul 30, 2020
48
Feb 8, 2020
48
Feb 8, 2020
75
May 7, 2018
2A
May 28, 2017
Resolved Violations (471)
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
71
Jul 1, 2025
+ 466 more resolved violations
Frequently Asked Questions
Is Old Lyme tap water safe to drink?
Old Lyme'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 Old Lyme tap water?
0 contaminants have been detected in Old Lyme's water supply across 11 water systems. See the full contaminant table above for details.
How can I improve my water quality in Old Lyme?
Install a water filter rated for the specific contaminants found in Old Lyme's water. See our filter recommendations above. You can also request your utility's Consumer Confidence Report for the most current test results.
Does Old Lyme have any water quality violations?
Yes, Old Lyme currently has 132 active violations. See the violations section above for details.