Port Washington, NY water hardness

Tap water hardness
59mg/L
3.4gpg
SoftReports range 59–78

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 Port Washington carries roughly 59 mg/L of dissolved calcium and magnesium, or 3.4 grains per gallon. That is soft water. The number comes from WA of Western Nassau, dated October 2025. Reports for this system disagree, with values from 59 to 78 mg/L.

Port Washington on the hardness scale, with nearby cities
060120180240300360+NY typical 31Old Westbury: 54 mg/LOld Westbury 54Kings Point: 55 mg/LKings Point 55Great Neck: 55 mg/LGreat Neck 55Great Neck Plaza: 55 mg/LGreat Neck Plaza 55Roslyn Heights: 55 mg/LRoslyn Heights 55Williston Park: 55 mg/LWilliston Park 55North New Hyde Park: 55 mg/LNorth New Hyde Park 55East Hills: 56 mg/LEast Hills 56Manhasset: 66 mg/LManhasset 66North Hills: 66 mg/LNorth Hills 66Port Washington 59mg/L as calcium carbonate060120180240300360+NY 31Kings Point: 55 mg/LKings Point 55Great Neck: 55 mg/LGreat Neck 55Great Neck Plaza: 55 mg/LGreat Neck. 55East Hills: 56 mg/LEast Hills 56Manhasset: 66 mg/LManhasset 66North Hills: 66 mg/LNorth Hills 6659 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 59 mg/L, Port Washington is 28 mg/L above the typical New York figure of 31. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 54 mg/L in Old Westbury to 66 in Manhasset.

What 59 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 59 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 Port Washington's water system

Port Washington WD · PWSID NY2912267

No health-based violations since 2016

Serves about 34,000 people from groundwater.

Health-based
0
Monitoring or reporting
0
Open now
0

EPA lists Port Washington WD as the system serving Port Washington. The hardness figure above comes from a different system's report, which TapWaterData uses for Port Washington.

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 Port Washington water hard?

No. It measures about 59 mg/L (3.4 grains per gallon), which the USGS classes as soft.

What is the water hardness in Port Washington in grains per gallon?

About 3.4 gpg. One grain per gallon equals 17.1 mg/L, so 59 mg/L divided by 17.1 gives 3.4.

Has the Port Washington water system had EPA violations?

EPA records show no health-based violations for Port Washington WD since 2016.

Nearby cities

All 149 cities in New York

Hardness data: TapWaterData US Water Hardness (utility report, October 23, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.