Aquarion-Greenwich, CT Water Quality
What's in Aquarion-Greenwich's water?
Aquarion-Greenwich has a health-based violation on record, but none in the last five years - an older issue, not necessarily a current one. 53,297 people get their water from it, across 17,060 connections.
How this compares nationally
31 total violations and 2 health-based ones put Aquarion-Greenwich at the 53th percentile nationally for violation burden, rank 6,058 of 12,903.
How Aquarion-Greenwich compares within CT
Among the 73 CT systems in this dataset, the average is 2.6 health-based violations - Aquarion-Greenwich's 2 is at or below that. The clean-record guide covers what a comparison like this can hide.
Most recent violation on record
The last violation EPA has on record for Aquarion-Greenwich is from 2024-01-06 (health-based: 2009-01-06). Last reported to EPA: 06/29/2026.
What kind of problem, specifically
Aquarion-Greenwich's flagged contaminants and rule violations, grouped by what they actually mean for a filter choice rather than left as EPA's raw code list:
- Microbial contamination / treatment technique - flagged from: Interim Enhanced Surface Water Treatment Rule
- Other regulated metals - flagged from: Fluoride
The most severe category on record is microbial contamination / treatment technique, which points toward a microbial-class filter if you want to address it directly.
What this data is and is not
This is what Aquarion-Greenwich 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. Water quality can still change between the meter and the faucet - household plumbing sits outside what a record of 31 logged violations can see. The guide to what this data misses covers that gap.