New London, CT water hardness

Tap water hardness
21mg/L
1.2gpg
Soft

Reported by New London Dept. of Public Utilities · November 2024

CT typical
53 mg/L
EPA health violations since 2016
0
Data
Utility report

New London water measures 21 mg/L (1.2 gpg) of hardness, soft by USGS standards. The number comes from New London Dept. of Public Utilities, dated November 2024.

New London on the hardness scale, with nearby cities
060120180240300360+CT typical 53Glastonbury Center: 16 mg/LGlastonbury Center 16Wethersfield: 16 mg/LWethersfield 16Groton: 22 mg/LGroton 22Conning Towers-Nautilus Park: 22 mg/LConning Towers-Nautilus Park 22Northford: 46 mg/LNorthford 46Branford Center: 46 mg/LBranford Center 46North Haven: 46 mg/LNorth Haven 46Middletown: 64 mg/LMiddletown 64Storrs: 97 mg/LStorrs 97Manchester: 131 mg/LManchester 131New London 21mg/L as calcium carbonate060120180240300360+CT 53Glastonbury Center: 16 mg/LGlastonbur. 16Groton: 22 mg/LGroton 22Conning Towers-Nautilus Park: 22 mg/LConning To. 22Northford: 46 mg/LNorthford 46Middletown: 64 mg/LMiddletown 64Storrs: 97 mg/LStorrs 9721 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

New London sits 32 mg/L below the typical Connecticut figure of 53. Of the 10 nearest cities we track, 2 have softer water and 8 have harder. The range nearby runs from 16 mg/L in Glastonbury Center to 131 in Manchester.

What 21 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Nothing, as far as hardness goes. At 21 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for New London's water system

New London Dept. of Public Utilities · PWSID CT0950011

No health-based violations since 2016

Serves about 27,620 people from surface water.

Health-based
0
Monitoring or reporting
13
Open now
0

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is New London water hard?

No. It measures about 21 mg/L (1.2 grains per gallon), which the USGS classes as soft.

What is the water hardness in New London in grains per gallon?

About 1.2 gpg. One grain per gallon equals 17.1 mg/L, so 21 mg/L divided by 17.1 gives 1.2.

Has the New London water system had EPA violations?

EPA records show no health-based violations for New London Dept. of Public Utilities since 2016. There were also 13 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 51 cities in Connecticut

Hardness data: TapWaterData US Water Hardness (utility report, November 23, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.