Connecticut Water Quality

Water hardness and quality data for 76 cities in Connecticut, USA.

State average

134mg/L

7.8 gpg

Hardness level

🟠 Hard

5 lab-verified

Cities

76

79 with data

Bridgeport

Pop. 147,629

🟡 Moderately Hard

60 mg/Lreservoir

PFAS: 9.2 ppt

Full report →

Hartford

Pop. 121,054

0–59 mg/Lreservoir

PFAS: 0 ppt

Full report →

New Haven

Pop. 130,322

≈ Moderately Hard

82 mg/Lreservoir

PFAS: 75.8 ppt

Full report →

North Stamford

Unincorporated area

Pop. 121,230

120–179 mg/Lreservoir

PFAS: 11.5 ppt

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Stamford

Pop. 128,874

120–179 mg/Lgroundwater

PFAS: 7.5 ppt

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Waterbury

Pop. 108,802

180+ mg/Lreservoir

PFAS: 0 ppt

Full report →

Bristol

Pop. 60,452

120–179 mg/Lreservoir

PFAS: 11.3 ppt

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City of Milford (balance)

Pop. 51,271

120–179 mg/Lreservoir

PFAS: 6.1 ppt

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Danbury

Pop. 84,657

120–179 mg/Lreservoir

PFAS: 65.3 ppt

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East Hartford

Pop. 51,252

0–59 mg/Lgroundwater

PFAS: 7.9 ppt

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East Norwalk

Unincorporated area

Pop. 84,530

120–179 mg/Lreservoir

PFAS: 8.3 ppt

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Enfield

Pop. 45,212

🟡 Moderately Hard

94 mg/Lgroundwater

PFAS: 73.5 ppt

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Fairfield

Pop. 59,052

120–179 mg/Lgroundwater

PFAS: 10.2 ppt

Full report →

Glastonbury

Pop. 31,876

120–179 mg/Lgroundwater

PFAS: 5 ppt

Full report →

Hamden

Pop. 59,847

120–179 mg/Lreservoir

PFAS: 6.9 ppt

Full report →

Manchester

Pop. 30,577

180+ mg/Lreservoir

PFAS: 270.7 ppt

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Meriden

Pop. 59,988

120–179 mg/Lreservoir

PFAS: 64.9 ppt

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Middletown

Pop. 46,756

120–179 mg/Lreservoir

PFAS: 0 ppt

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Milford

Pop. 52,759

120–179 mg/Lgroundwater

PFAS: 8.2 ppt

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Naugatuck

Pop. 31,538

120–179 mg/Lgroundwater

PFAS: 9.9 ppt

Full report →

New Britain

Pop. 72,808

120–179 mg/Lreservoir

PFAS: 0 ppt

Full report →

Newington

Pop. 30,562

0–59 mg/Lgroundwater

PFAS: 10.8 ppt

Full report →

Norwalk

Pop. 88,485

120–179 mg/Lreservoir

PFAS: 91.4 ppt

Full report →

Norwich

Pop. 39,899

120–179 mg/Lreservoir

PFAS: 96.6 ppt

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Shelton

Pop. 41,296

120–179 mg/Lreservoir

PFAS: 86.1 ppt

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Southington

Pop. 43,501

120–179 mg/Lreservoir

PFAS: 111 ppt

Full report →

Stratford

Pop. 51,384

120–179 mg/Lreservoir

PFAS: 8.2 ppt

Full report →

Torrington

Pop. 34,906

120–179 mg/Lgroundwater

PFAS: 9.7 ppt

Full report →

Trumbull

Pop. 36,018

120–179 mg/Lgroundwater

PFAS: 10.2 ppt

Full report →

West Hartford

Pop. 63,268

0–59 mg/Lreservoir

PFAS: 5.2 ppt

Full report →

West Haven

Pop. 54,927

120–179 mg/Lgroundwater

PFAS: 5.3 ppt

Full report →

West Torrington

Unincorporated area

Pop. 36,000

120–179 mg/Lreservoir

PFAS: 5.6 ppt

Full report →

Ansonia

Pop. 18,854

120–179 mg/Lreservoir

PFAS: 5.5 ppt

Full report →

Avon

Pop. 18,932

120–179 mg/Lreservoir

PFAS: 6 ppt

Full report →

Bloomfield

Pop. 21,535

120–179 mg/Lgroundwater

PFAS: 8.4 ppt

Full report →

Branford

Pop. 29,438

120–179 mg/Lgroundwater

PFAS: 10 ppt

Full report →

Cheshire

Pop. 29,443

120–179 mg/Lreservoir

PFAS: 4.6 ppt

Full report →

Cromwell

Pop. 13,750

≈ Moderately Hard

99.5 mg/Lgroundwater

PFAS: 17.5 ppt

Full report →

Darien

Pop. 20,732

120–179 mg/Lreservoir

PFAS: 5 ppt

Full report →

Derby

Pop. 12,700

120–179 mg/Lreservoir

PFAS: 6 ppt

Full report →

East Haven

Pop. 29,257

120–179 mg/Lreservoir

PFAS: 8 ppt

Full report →

Ellington

Pop. 14,693

120–179 mg/Lreservoir

PFAS: 9.4 ppt

Full report →

Farmington

Pop. 25,000

≈ Moderately Hard

84.5 mg/Lgroundwater

PFAS: 10.6 ppt

Full report →

Greenwich

Pop. 12,942

🟡 Moderately Hard

68.48 mg/Lgroundwater

PFAS: 6.2 ppt

Full report →

Guilford

Pop. 22,498

120–179 mg/Lreservoir

PFAS: 6.5 ppt

Full report →

Killingly Center

Pop. 17,282

120–179 mg/Lreservoir

PFAS: 11.9 ppt

Full report →

Ledyard

Pop. 15,212

120–179 mg/Lreservoir

PFAS: 5.2 ppt

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Madison

Pop. 19,100

120–179 mg/Lreservoir

PFAS: 6.6 ppt

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Mansfield City

Pop. 26,439

120–179 mg/Lreservoir

PFAS: 6.9 ppt

Full report →

Montville Center

Pop. 20,180

120–179 mg/Lreservoir

PFAS: 8.9 ppt

Full report →

New Canaan

Pop. 19,738

51.36 mg/Lreservoir

PFAS: 10.2 ppt

Full report →

New Fairfield

Pop. 14,126

120–179 mg/Lgroundwater

PFAS: 10.3 ppt

Full report →

New London

Pop. 27,179

0–59 mg/Lreservoir

PFAS: 10.5 ppt

Full report →

North Branford

Pop. 14,454

120–179 mg/Lreservoir

PFAS: 11.2 ppt

Full report →

North Haven

Pop. 24,093

120–179 mg/Lreservoir

PFAS: 11.4 ppt

Full report →

Old Saybrook

Pop. 10,627

120–179 mg/Lreservoir

PFAS: 4.6 ppt

Full report →

Orange

Pop. 13,956

120–179 mg/Lgroundwater

PFAS: 4.8 ppt

Full report →

Oxford

Pop. 11,345

120–179 mg/Lreservoir

PFAS: 5.2 ppt

Full report →

Plainfield

Pop. 15,498

120–179 mg/Lreservoir

PFAS: 6.8 ppt

Full report →

Plainville

Pop. 17,328

120–179 mg/Lgroundwater

PFAS: 6.8 ppt

Full report →

Plymouth

Pop. 12,284

120–179 mg/Lreservoir

PFAS: 7 ppt

Full report →

Seymour

Pop. 16,562

120–179 mg/Lgroundwater

PFAS: 5.2 ppt

Full report →

South Windsor

Pop. 24,412

0–59 mg/Lgroundwater

PFAS: 6.8 ppt

Full report →

Southbury

Pop. 19,836

120–179 mg/Lgroundwater

PFAS: 6.8 ppt

Full report →

Stafford

Pop. 12,029

120–179 mg/Lgroundwater

PFAS: 7.4 ppt

Full report →

Storrs

Pop. 15,344

120–179 mg/Lreservoir

PFAS: 14 ppt

Full report →

Tolland

Pop. 14,891

0–59 mg/Lgroundwater

PFAS: 9.6 ppt

Full report →

Wallingford

Pop. 17,712

120–179 mg/Lreservoir

PFAS: 28.6 ppt

Full report →

Wallingford Center

Pop. 18,209

120–179 mg/Lreservoir

PFAS: 28.6 ppt

Full report →

Waterford

Pop. 19,281

120–179 mg/Lreservoir

PFAS: 0 ppt

Full report →

Westport

Pop. 26,391

120–179 mg/Lreservoir

PFAS: 5.8 ppt

Full report →

Wethersfield

Pop. 26,668

120–179 mg/Lgroundwater

PFAS: 5.9 ppt

Full report →

Willimantic

Pop. 17,737

25 mg/Lgroundwater

PFAS: 6.5 ppt

Full report →

Wilton

Pop. 18,062

120–179 mg/Lreservoir

PFAS: 0 ppt

Full report →

Winchester Center

Pop. 10,830

120–179 mg/Lreservoir

PFAS: 6.7 ppt

Full report →

Windham

Pop. 23,072

0–59 mg/Lgroundwater

PFAS: 6.7 ppt

Full report →

Windsor

Pop. 28,778

120–179 mg/Lgroundwater

PFAS: 6.8 ppt

Full report →

Windsor Locks

Pop. 12,498

120–179 mg/Lreservoir

PFAS: 6.8 ppt

Full report →

Wolcott

Pop. 16,639

120–179 mg/Lreservoir

PFAS: 7 ppt

Full report →