How hard is the water in Northport, NY?

Tap water hardness
70mg/L
4.1gpg
Moderately hard

Reported by Northport Va Hospital · May 2025

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

Northport water measures 70 mg/L (4.1 gpg) of hardness, moderately hard by USGS standards. The number comes from Northport Va Hospital, dated May 2025.

Northport on the hardness scale, with nearby cities
060120180240300360+NY typical 31Huntington: 21 mg/LHuntington 21Dix Hills: 21 mg/LDix Hills 21Syosset: 24 mg/LSyosset 24Greenlawn: 31 mg/LGreenlawn 31Oyster Bay: 45 mg/LOyster Bay 45Kings Park: 46 mg/LKings Park 46Smithtown: 46 mg/LSmithtown 46Plainview: 54 mg/LPlainview 54Fort Salonga: 70 mg/LFort Salonga 70Hauppauge: 85 mg/LHauppauge 85Northport 70mg/L as calcium carbonate060120180240300360+NY 31Huntington: 21 mg/LHuntington 21Dix Hills: 21 mg/LDix Hills 21Greenlawn: 31 mg/LGreenlawn 31Kings Park: 46 mg/LKings Park 46Smithtown: 46 mg/LSmithtown 46Fort Salonga: 70 mg/LFort Salon. 7070 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 70 mg/L, Northport is 39 mg/L above the typical New York figure of 31. Of the 10 nearest cities we track, 8 have softer water and 1 has harder. The range nearby runs from 21 mg/L in Huntington to 85 in Hauppauge.

What 70 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 Northport

3 people × 75 gallons a day × 4.1 gpg = 925 grains a day. A 24,000-grain unit regenerates about every 25 days.

Size it for your household

EPA record for Northport's water system

Northport Va Hospital · PWSID NY5111894

No health-based violations since 2016

Serves about 3,088 people from groundwater.

Health-based
0
Monitoring or reporting
49
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 Northport water hard?

Somewhat. It measures about 70 mg/L (4.1 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Northport in grains per gallon?

About 4.1 gpg. One grain per gallon equals 17.1 mg/L, so 70 mg/L divided by 17.1 gives 4.1.

What size water softener do I need in Northport?

For 3 people using 75 gallons each per day, 4.1 gpg works out to about 925 grains a day. A 24,000-grain softener covers that with a regeneration about every 25 days.

Has the Northport water system had EPA violations?

EPA records show no health-based violations for Northport Va Hospital since 2016. There were also 49 monitoring or reporting violations, 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, May 5, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.