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Water Hardness in Connecticut Cities

Water hardness in Connecticut, characterized by the amount of dissolved minerals such as calcium and magnesium, can significantly differ among various cities across the state due to its varied geological landscapes. Situated in the northeastern U.S., Connecticut’s water hardness levels reflect the geological diversity within the state.

Across Connecticut, water hardness can range from moderately soft to very hard, depending on the geological makeup of the area and the source of the water supply. For example, coastal areas often have softer water due to the influence of river basins and the Atlantic Coastal Plain’s sedimentary deposits, while regions in the northern and northwestern parts of the state may experience harder water due to the higher mineral content from metamorphic and igneous rock formations.

The variation in water hardness throughout Connecticut influences not only the taste and aesthetics of the water but also the efficiency of soaps and detergents, plumbing maintenance, and the lifespan of appliances that utilize water. Given the state’s considerable geological diversity, water hardness is not uniform, highlighting the need for localized water treatment solutions and ongoing monitoring of water quality.

In the provided data, the water hardness levels show substantial variations across different cities in Connecticut. Among the cities for which data is reported, the highest water hardness level is recorded in Newtown with a hardness of 171.2 ppm, 10.0 gpg. Conversely, the city with the lowest recorded water hardness level is Stamford, reporting a hardness of 51.4 ppm, 3.0 gpg.

CityHardness ppm (mg/L)Hardness gpgInformation SourceNotes
Bridgeport59.93.5Link
Stamford51.43.0Link
New Havenn/an/aLink
Hartfordn/an/aLinkAlkalinity and pH only
Waterburyn/an/aLink
Norwalk87.95.1Link
Danbury102.76.0Link
New Britainn/an/aLink
Bristoln/an/aLink
Meridenn/an/aLink
West Havenn/an/aLinkCovered by New Haven
Milfordn/an/aLinkCovered by New Haven
Middletownn/an/aLink
Shelton59.93.5LinkCovered by Bridgeport
Norwichn/an/aLink
Torrington154.19.0LinkLitchfield/Goshen/Torrington
Naugatuckn/an/aLink
New Londonn/an/aLink
Ansonian/an/aLinkCovered by New Haven
Derbyn/an/aLinkCovered by New Haven
Grotonn/an/aLink
Danielsonn/an/aLinkOnly able to find a NYT toxic water reports for the town’s water utility
Jewett Cityn/an/aLink
Newtown171.210.0Link
Woodmontn/an/aLinkBoro of Milford
Litchfield154.19.0LinkLitchfield/Goshen/Torrington
Stoningtonn/an/aLink
Bantam154.19.0LinkCovered by Litchfield
Groton Long Pointn/an/aLinkCovered by Groton
Fenwickn/an/aLinkUnder the Old Saybrook water report
Connecticut cities by population and their reported water hardness
ppm = Parts Per Million
mg/L = Milligrams Per Liter
gpg = Grains Per Gallon

Hard water can cause issues such as mineral buildup in plumbing and appliances, reduce the efficacy of soaps and detergents, and affect the taste of the water. A tried and true solution is the use of a water softener. A water softener, like the ones from DROP, could be a worthwhile investment.

These devices work by replacing the calcium and magnesium ions that cause hardness with sodium ions, resulting in softer water. With innovative features, easy installation, and efficient operation, DROP smart water softeners provide a solution to hard water issues, extending the lifespan of appliances, improving water taste, enhancing soap effectiveness, reducing scale build-up, and increasing the overall water efficiency in your home.

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