Connecticut Water Quality Rankings 2026

All 25 cities ranked by water quality score

State Average82/100

Cities Ranked

West Haven

Best City (97/100)

Danbury

Lowest Score (67/100)

72%

Above National Avg

Grade Distribution

How Connecticut's 25 cities are distributed by water quality grade

A Range

44% of cities

B Range

44% of cities

C Range

12% of cities

0% of cities

Cities with good water quality (B or better)72%

18 out of 25 cities meet or exceed a B grade for water quality

All 25 Connecticut Cities Ranked

Sorted by water quality score from best to worst. Click any city for a detailed water quality report.

Rank	City	Score	Grade	Population	Top Concern
1	West Haven	97/100	A+	54,666	None identified
2	New Britain	95/100	A+	72,543	None identified
3	Middletown	94/100	A	46,406	None identified
#4	New London	94/100	A	27,001	None identified
#5	Naugatuck	92/100	A	31,519	None identified
#6	Norwalk	88/100	A-	91,184	None identified
#7	Bridgeport	87/100	A-	148,654	None identified
#8	Meriden	87/100	A-	60,868	None identified
#9	Manchester	85/100	A-	35,946	None identified
#10	Norwich	85/100	A-	39,112	None identified
#11	Waterbury	85/100	A-	114,403	None identified
#12	Torrington	83/100	B+	34,319	None identified
#13	Bristol	82/100	B+	60,062	None identified
#14	Derby	82/100	B+	12,325	None identified
#15	Shelton	82/100	B+	41,162	None identified
#16	Stratford	82/100	B+	52,485	None identified
#17	Ansonia	81/100	B+	18,709	None identified
#18	Hartford	80/100	B+	121,054	None identified
#19	Groton	72/100	B-	38,411	None identified
#20	Stamford	72/100	B-	135,470	None identified
#21	East Hartford	71/100	B-	50,446	None identified
#22	Milford	71/100	B-	53,348	None identified
#23	Enfield	68/100	C+	42,141	None identified
#24	New Haven	68/100	C+	134,023	None identified
#25	Danbury	67/100	C+	86,518	None identified

Key Findings

The best water quality in Connecticut is found in West Haven with a score of 97/100 and a grade of A+. This puts West Haven among the top-performing cities in the country for drinking water safety.

The most concerning water quality is in Danbury scoring 67/100 with a grade of C+. Residents may want to consider home water testing and filtration options.

The statewide average score is 82/100, which is 10 points above the national average of 72/100. Over half (72%) of Connecticut cities score above the national average, though some areas face challenges.

Frequently Asked Questions

Which city in Connecticut has the best water quality?

West Haven has the best water quality in Connecticut with a score of 97/100 and a grade of A+. This score is based on contaminant levels, EPA compliance history, and infrastructure quality. West Haven ranks among the top cities nationally for water quality.

Is Connecticut tap water safe to drink?

Water quality varies across Connecticut. The state average score is 82/100. 72% of Connecticut cities have good water quality (grade B or better). All cities in Connecticut maintain at least a C-grade, though individual results can vary by neighborhood and home plumbing. Always check your specific city's water quality report for the most accurate local information.

How many Connecticut cities have water quality concerns?

Of the 25 cities tracked in Connecticut, 0 cities have a D or F grade, indicating significant water quality concerns. An additional 3 cities fall in the C range, suggesting moderate issues. 18 out of 25 cities (72%) score above the national average of 72/100. Residents concerned about their water quality can check their city's detailed report for specific contaminant information.