Connecticut
Water Quality Report
77 Good
Average Score
77/100
Water Systems
104
Population
2.8M
Violations
332 25 unresolved
Score Distribution
38 A
16 B
9 C
1 D
3 F
Lowest Scoring Water Systems
0
Wallingford Water Department F
CT1480011 Wallingford, CT 37,267 served
0
Aquarion-New Milford Regional F
CT0960011 Shelton, CT 13,331 served
44
Danbury Water Department F
CT0340011 Danbury, CT 62,055 served
57
Aquarion-Plainville Regional D
CT1100011 Shelton, CT 18,231 served
65
Southington Water Department C
CT1310011 Southington, CT 43,069 served
Counties in Connecticut
Cities in Connecticut
View all 54 cities →Popular City Comparisons in Connecticut
Quickly compare major cities in Connecticut by water quality score and grade.
Frequently Asked Questions
Is tap water in Connecticut safe to drink?
Connecticut has an average WaterQ score of 77/100 across 104 public water systems. Safety can vary by city and system, so check your local report for recent violations and contaminants.
How many water systems are in Connecticut?
WaterQ currently tracks 104 public water systems in Connecticut.
Where can I compare cities in Connecticut?
Use the city list below to open detailed reports, or visit the compare tool to benchmark two cities side-by-side on score, grade, and system coverage.