How hard is the water in Croton-on-Hudson, NY?

Tap water hardness
107mg/L
6.3gpg
Moderately hard

Reported by Croton-on-Hudson Village · December 2024

NY typical
31 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

The water in Croton-on-Hudson carries roughly 107 mg/L of dissolved calcium and magnesium, or 6.3 grains per gallon. That is moderately hard water. The number comes from Croton-on-Hudson Village, dated December 2024.

Croton-on-Hudson on the hardness scale, with nearby cities
060120180240300360+NY typical 31Tarrytown: 19 mg/LTarrytown 19Sleepy Hollow: 22 mg/LSleepy Hollow 22Briarcliff Manor: 30 mg/LBriarcliff Manor 30Pleasantville: 32 mg/LPleasantville 32Mount Kisco: 55 mg/LMount Kisco 55Peekskill: 100 mg/LPeekskill 100Ossining: 103 mg/LOssining 103New City: 106 mg/LNew City 106Spring Valley: 106 mg/LSpring Valley 106Monsey: 106 mg/LMonsey 106Croton-on-Hudson 107mg/L as calcium carbonate060120180240300360+NY 31Sleepy Hollow: 22 mg/LSleepy Hol. 22Briarcliff Manor: 30 mg/LBriarcliff. 30Pleasantville: 32 mg/LPleasantvi. 32Peekskill: 100 mg/LPeekskill 100Ossining: 103 mg/LOssining 103New City: 106 mg/LNew City 106107 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 107 mg/L, Croton-on-Hudson is 76 mg/L above the typical New York figure of 31. None of the 10 nearest cities we track has harder water. The range nearby runs from 19 mg/L in Tarrytown to 106 in New City.

What 107 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for Croton-on-Hudson

3 people × 75 gallons a day × 6.3 gpg = 1,408 grains a day. A 24,000-grain unit regenerates about every 17 days.

Size it for your household

EPA record for Croton-on-Hudson's water system

Croton on Hudson Village · PWSID NY5903425

No health-based violations since 2016

Serves about 8,000 people from groundwater.

Health-based
0
Monitoring or reporting
1
Open now
1

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 Croton-on-Hudson water hard?

Somewhat. It measures about 107 mg/L (6.3 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Croton-on-Hudson in grains per gallon?

About 6.3 gpg. One grain per gallon equals 17.1 mg/L, so 107 mg/L divided by 17.1 gives 6.3.

What size water softener do I need in Croton-on-Hudson?

For 3 people using 75 gallons each per day, 6.3 gpg works out to about 1,408 grains a day. A 24,000-grain softener covers that with a regeneration about every 17 days.

Has the Croton-on-Hudson water system had EPA violations?

EPA records show no health-based violations for Croton on Hudson Village since 2016. There were also 1 monitoring or reporting violation, which are about late or missing tests and notices.

Nearby cities

All 149 cities in New York

Hardness data: TapWaterData US Water Hardness (utility report, December 19, 2024), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.