Water Hardness Atlas ZIP / postcode

Tap water hardness in Connecticut

We have published hardness data for 4 cities in Connecticut. The median is 3 gpg; the hardest water is in Bridgeport CT (3 gpg), the softest in Torrington (1 gpg).

0 % of these cities have hard or very hard water (over 120 mg/L).

USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.

Cities in Connecticut, hardest first

gpgmg/L
Bridgeport CT351soft
Shelton351soft
Stamford CT351soft
Torrington117soft

On a private well? Well water hardness in Connecticut by county →

All cities in the United States →