Hard water in New Britain, CT
Reported by Aquarion Water CO of CT - Plainville · September 2025
- CT typical
- 53 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
The water in New Britain carries roughly 162 mg/L of dissolved calcium and magnesium, or 9.5 grains per gallon. That is hard water. The number comes from Aquarion Water CO of CT - Plainville, dated September 2025.
At 162 mg/L, New Britain is 109 mg/L above the typical Connecticut figure of 53. None of the 10 nearest cities we track has harder water. The range nearby runs from 16 mg/L in Newington to 162 in Bristol.
What 162 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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
At 162 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 9.5 gpg = 2,131 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for New Britain's water system
No health-based violations since 2016
Serves about 73,534 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 9
- Open now
- 0
EPA lists New Britain Water Department as the system serving New Britain. The hardness figure above comes from a different system's report, which TapWaterData uses for New Britain.
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 Britain water hard?
Yes. It measures about 162 mg/L (9.5 grains per gallon), which the USGS classes as hard.
What is the water hardness in New Britain in grains per gallon?
About 9.5 gpg. One grain per gallon equals 17.1 mg/L, so 162 mg/L divided by 17.1 gives 9.5.
What size water softener do I need in New Britain?
For 3 people using 75 gallons each per day, 9.5 gpg works out to about 2,131 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the New Britain water system had EPA violations?
EPA records show no health-based violations for New Britain Water Department since 2016. There were also 9 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Newington16 mg/LSoft
- Wethersfield16 mg/LSoft
- West Hartford16 mg/LSoft
- Bristol162 mg/LHard
- Hartford16 mg/LSoft
- Glastonbury Center16 mg/LSoft
- East Hartford16 mg/LSoft
- Middletown64 mg/LModerately hard
- Cheshire Village46 mg/LSoft
- Waterbury66 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, September 2, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.