How hard is the water in Connecticut?

The average water hardness across Connecticut is 57 PPM (3.3 GPG), classified as soft. Hardness varies by city - the hardest water is in Centerbrook (105 PPM) and the softest is in Ellington (22 PPM).

What city in Connecticut has the hardest water?

Centerbrook has the hardest water in Connecticut at 105 PPM. A water softener is recommended for residents.

How many water systems are in Connecticut?

Connecticut has 475 active community water systems serving 222 cities.

Water Hardness in Connecticut

Average: 57 PPMSoft222 cities475 water systems

Top 10 Hardest Water Cities

#	City	Hardness
1	Centerbrook	Slightly Hard (105 PPM)
2	Durham	Slightly Hard (105 PPM)
3	Haddam	Slightly Hard (105 PPM)
4	Higganum	Slightly Hard (105 PPM)
5	Ivoryton	Slightly Hard (105 PPM)
6	Middlefield	Slightly Hard (105 PPM)
7	Rockfall	Slightly Hard (105 PPM)
8	East Haddam	Slightly Hard (105 PPM)
9	Moodus	Slightly Hard (105 PPM)
10	Killingworth	Slightly Hard (104 PPM)

Top 10 Softest Water Cities

#	City	Hardness
1	Ellington	Soft (22 PPM)
2	Tolland	Soft (22 PPM)
3	Brooklyn	Soft (26 PPM)
4	Plainfield	Soft (26 PPM)
5	Hebron	Soft (26 PPM)
6	Coventry	Soft (27 PPM)
7	Amston	Soft (27 PPM)
8	Andover	Soft (27 PPM)
9	Chaplin	Soft (27 PPM)
10	Columbia	Soft (27 PPM)

All Cities in Connecticut

AmstonSoft AndoverSoft AnsoniaSoft AvonSlightly Hard BalticSoft BantamSlightly Hard Beacon FallsSoft BerlinSlightly Hard BethanySoft BethelSlightly Hard BethlehemSlightly Hard BloomfieldSlightly Hard BoltonSoft BozrahSoft BranfordSoft BridgeportSlightly Hard BridgewaterSlightly Hard BristolSlightly Hard BrookfieldSlightly Hard BrooklynSoft BurlingtonSlightly Hard ByramSlightly Hard CanaanSlightly Hard CanterburySoft CantonSlightly Hard Canton CenterSlightly Hard CenterbrookSlightly Hard ChaplinSoft CheshireSoft ChesterSlightly Hard ClintonSlightly Hard ColchesterSoft ColebrookSlightly Hard CollinsvilleSlightly Hard ColumbiaSoft Cos CobSlightly Hard CoventrySoft CromwellSlightly Hard DanburySlightly Hard DanielsonSoft DarienSlightly Hard DayvilleSoft Deep RiverSlightly Hard DerbySoft DurhamSlightly Hard East BerlinSlightly Hard East CanaanSlightly Hard East GranbySlightly Hard East HaddamSlightly Hard East HamptonSlightly Hard East HartfordSlightly Hard East HartlandSlightly Hard East HavenSoft East LymeSoft East WindsorSlightly Hard EastfordSoft EastonSlightly Hard EllingtonSoft EnfieldSlightly Hard EssexSlightly Hard Falls VillageSlightly Hard FarmingtonSlightly Hard Gales FerrySoft GaylordsvilleSlightly Hard GilmanSoft GlastonburySlightly Hard GoshenSlightly Hard GranbySlightly Hard GreenwichSlightly Hard GrotonSoft GuilfordSoft HaddamSlightly Hard HamdenSoft HamptonSoft HartfordSlightly Hard HarwintonSlightly Hard HebronSoft HigganumSlightly Hard IvorytonSlightly Hard Jewett CitySoft KentSoft KillingworthSlightly Hard LakevilleSlightly Hard LebanonSoft LedyardSoft LitchfieldSlightly Hard MadisonSoft ManchesterSlightly Hard Mansfield CenterSoft Maple HillSlightly Hard MarlboroughSlightly Hard MeridenSoft MiddleburySoft MiddlefieldSlightly Hard MiddletownSlightly Hard MilfordSoft MonroeSlightly Hard MoodusSlightly Hard MoosupSoft MorrisSlightly Hard MysticSoft NaugatuckSoft New BritainSlightly Hard New CanaanSlightly Hard New FairfieldSlightly Hard New HartfordSoft New HavenSoft New LondonSoft New MilfordSlightly Hard New Preston MarbSlightly Hard NewtownSlightly Hard NianticSoft NorfolkSlightly Hard North BranfordSoft North CantonSlightly Hard North FranklinSoft North GranbySlightly Hard North GrosvenordSoft North HavenSoft North StoningtonSoft North WindhamSoft NorthfieldSlightly Hard NorthfordSoft NorwalkSlightly Hard NorwichSoft OakdaleSoft OakvilleSlightly Hard Old GreenwichSlightly Hard Old LymeSoft Old SaybrookSlightly Hard OnecoSoft OrangeSoft OxfordSoft PawcatuckSoft PlainfieldSoft PlainvilleSlightly Hard PlantsvilleSlightly Hard Pleasant ValleySlightly Hard PlymouthSoft Pomfret CenterSoft PortlandSlightly Hard PrestonSoft ProspectSoft PutnamSoft Quaker HillSoft QuinebaugSoft RidgefieldSlightly Hard RidgewaySlightly Hard RiversideSlightly Hard RivertonSlightly Hard RockfallSlightly Hard Rocky HillSlightly Hard RoxburySlightly Hard SalemSoft SalisburySlightly Hard Sandy HookSlightly Hard ScotlandSoft SeymourSoft SharonSoft SheltonSlightly Hard ShermanSlightly Hard SimsburySlightly Hard SomersSlightly Hard South GlastonburSlightly Hard South KentSlightly Hard South LymeSoft South WindhamSoft South WindsorSlightly Hard SouthburySoft SouthingtonSlightly Hard Stafford SpringsSoft StamfordSlightly Hard SterlingSoft StoningtonSoft Storrs MansfieldSoft SuffieldSlightly Hard TaftvilleSoft TariffvilleSlightly Hard TerryvilleSlightly Hard ThomastonSoft ThompsonSoft TollandSoft TorringtonSlightly Hard TrumbullSlightly Hard UncasvilleSoft UnionvilleSlightly Hard University Of CtSoft Vernon RockvilleSoft VoluntownSoft W HartfordSlightly Hard WallingfordSoft WarrenSlightly Hard WarrenvilleSoft Washington DepotSlightly Hard WaterburySoft WaterfordSoft WatertownSlightly Hard WeatogueSlightly Hard West CornwallSlightly Hard West GranbySlightly Hard West HartlandSlightly Hard West HavenSoft West ReddingSlightly Hard West SimsburySlightly Hard West SuffieldSlightly Hard West WillingtonSoft WestbrookSlightly Hard WestonSlightly Hard WestportSlightly Hard WethersfieldSlightly Hard WillimanticSoft WiltonSlightly Hard WindhamSoft WindsorSlightly Hard Windsor LocksSlightly Hard WindsorvilleSlightly Hard WinstedSoft WolcottSoft WoodbridgeSoft WoodburySlightly Hard WoodstockSoft Woodstock ValleySoft