How hard is the water in Hoboken, NJ?

Tap water hardness
76mg/L
4.4gpg
Moderately hard

Reported by Hoboken Water Utility · October 2025

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

The water in Hoboken carries roughly 76 mg/L of dissolved calcium and magnesium, or 4.4 grains per gallon. That is moderately hard water. The number comes from Hoboken Water Utility, dated October 2025.

Hoboken on the hardness scale, with nearby cities
060120180240300360+NJ typical 80Jersey City: 73 mg/LJersey City 73Fairview: 86 mg/LFairview 86Union City: 96 mg/LUnion City 96West New York: 96 mg/LWest New York 96Secaucus: 96 mg/LSecaucus 96Guttenberg: 96 mg/LGuttenberg 96Cliffside Park: 96 mg/LCliffside Park 96East Rutherford: 96 mg/LEast Rutherford 96Carlstadt: 96 mg/LCarlstadt 96Kearny: 106 mg/LKearny 106Hoboken 76mg/L as calcium carbonate060120180240300360+NJ 80Jersey City: 73 mg/LJersey City 73Union City: 96 mg/LUnion City 96West New York: 96 mg/LWest New Y. 96Secaucus: 96 mg/LSecaucus 96Guttenberg: 96 mg/LGuttenberg 96Kearny: 106 mg/LKearny 10676 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 76 mg/L, Hoboken is close to the typical New Jersey figure of 80 mg/L. Of the 10 nearest cities we track, 1 has softer water and 9 have harder. The range nearby runs from 73 mg/L in Jersey City to 106 in Kearny.

What 76 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 Hoboken

3 people × 75 gallons a day × 4.4 gpg = 994 grains a day. A 24,000-grain unit regenerates about every 24 days.

Size it for your household

EPA record for Hoboken's water system

Hoboken Water Utility · PWSID NJ0905001

No health-based violations since 2016

Serves about 52,000 people from surface water.

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 Hoboken water hard?

Somewhat. It measures about 76 mg/L (4.4 grains per gallon), which the USGS classes as moderately hard.

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

About 4.4 gpg. One grain per gallon equals 17.1 mg/L, so 76 mg/L divided by 17.1 gives 4.4.

What size water softener do I need in Hoboken?

For 3 people using 75 gallons each per day, 4.4 gpg works out to about 994 grains a day. A 24,000-grain softener covers that with a regeneration about every 24 days.

Has the Hoboken water system had EPA violations?

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

Nearby cities

All 227 cities in New Jersey

Hardness data: TapWaterData US Water Hardness (utility report, October 9, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.