Dix Hills, NY water hardness

Tap water hardness
21mg/L
1.2gpg
Soft

Reported by Dix Hills Water District · September 2025

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

Dix Hills water measures 21 mg/L (1.2 gpg) of hardness, soft by USGS standards. The number comes from Dix Hills Water District, dated September 2025.

Dix Hills on the hardness scale, with nearby cities
060120180240300360+NY typical 31East Farmingdale: 10 mg/LEast Farmingdale 10North Lindenhurst: 10 mg/LNorth Lindenhurst 10Farmingdale: 10 mg/LFarmingdale 10Huntington: 21 mg/LHuntington 21Greenlawn: 31 mg/LGreenlawn 31Old Bethpage: 37 mg/LOld Bethpage 37Smithtown: 46 mg/LSmithtown 46Plainview: 54 mg/LPlainview 54Northport: 70 mg/LNorthport 70Hauppauge: 85 mg/LHauppauge 85Dix Hills 21mg/L as calcium carbonate060120180240300360+NY 31East Farmingdale: 10 mg/LEast Farmi. 10North Lindenhurst: 10 mg/LNorth Lind. 10Huntington: 21 mg/LHuntington 21Greenlawn: 31 mg/LGreenlawn 31Northport: 70 mg/LNorthport 70Hauppauge: 85 mg/LHauppauge 8521 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 21 mg/L, Dix Hills is close to the typical New York figure of 31 mg/L. Of the 10 nearest cities we track, 3 have softer water and 6 have harder. The range nearby runs from 10 mg/L in East Farmingdale to 85 in Hauppauge.

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 Dix Hills's water system

Dix Hills Water District · PWSID NY5103276

No health-based violations since 2016

Serves about 34,522 people from groundwater.

Health-based
0
Monitoring or reporting
1
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 Dix Hills 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 Dix Hills 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 Dix Hills water system had EPA violations?

EPA records show no health-based violations for Dix Hills Water District 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, September 9, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.