East Hills, NY water hardness

Tap water hardness
56mg/L
3.2gpg
Soft

Reported by WA of Western Nassau · October 2025

NY typical
31 mg/L
EPA health violations since 2016
0
Data
Utility report

The water in East Hills carries roughly 56 mg/L of dissolved calcium and magnesium, or 3.2 grains per gallon. That is soft water. The number comes from WA of Western Nassau, dated October 2025.

East Hills on the hardness scale, with nearby cities
060120180240300360+NY typical 31Carle Place: 51 mg/LCarle Place 51Mineola: 51 mg/LMineola 51Garden City Park: 51 mg/LGarden City Park 51Old Westbury: 54 mg/LOld Westbury 54Roslyn Heights: 55 mg/LRoslyn Heights 55Williston Park: 55 mg/LWilliston Park 55Westbury: 55 mg/LWestbury 55Port Washington: 59 mg/LPort Washington 59North Hills: 66 mg/LNorth Hills 66Manhasset: 66 mg/LManhasset 66East Hills 56mg/L as calcium carbonate060120180240300360+NY 31Carle Place: 51 mg/LCarle Place 51Old Westbury: 54 mg/LOld Westbu. 54Roslyn Heights: 55 mg/LRoslyn Hei. 55Williston Park: 55 mg/LWilliston. 55Westbury: 55 mg/LWestbury 55North Hills: 66 mg/LNorth Hills 6656 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

East Hills sits 25 mg/L above the typical New York figure of 31. Of the 10 nearest cities we track, 7 have softer water and 3 have harder. The range nearby runs from 51 mg/L in Carle Place to 66 in North Hills.

What 56 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 56 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 East Hills's water system

WA of Western Nassau · PWSID NY2902830

No health-based violations since 2016

Serves about 120,000 people from groundwater.

Health-based
0
Monitoring or reporting
1
Open now
0

TapWaterData ties East Hills to this system. EPA's service-area records do not name East Hills, so check the utility printed on your water bill.

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 East Hills water hard?

No. It measures about 56 mg/L (3.2 grains per gallon), which the USGS classes as soft.

What is the water hardness in East Hills in grains per gallon?

About 3.2 gpg. One grain per gallon equals 17.1 mg/L, so 56 mg/L divided by 17.1 gives 3.2.

Has the East Hills water system had EPA violations?

EPA records show no health-based violations for WA of Western Nassau 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, October 15, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.