Groton Utilities, CT Water Quality
What's in Groton Utilities's water?
Groton Utilities's only violations on record are reporting or monitoring lapses, not a contaminant or treatment-technique failure EPA classifies as health-based. It serves 30,200 people through 5,261 service connections.
How this compares nationally
Groton Utilities has 3 violations on record in total, 0 of them health-based - ranking it 11,578th of 12,903 systems by violation count, the 10th percentile nationally.
Against the CT average
Among the 73 CT systems in this dataset, the average is 2.6 health-based violations - Groton Utilities's 0 is at or below that. See the lead and copper guide for why lead counts differently.
Most recent violation on record
Groton Utilities's most recent violation on record is dated 2023-01-07. Last reported to EPA: 06/29/2026.
What Groton Utilities's record does not cover
This is what Groton Utilities reported to its state primacy agency and EPA under the Safe Drinking Water Act - real regulatory record, not a lab test of your specific tap. Between the utility's meter and Groton Utilities's customers' taps is household plumbing, invisible to a system-level record ranked 11,578th of 12,903 by violation count. The guide to what this data misses covers that gap.