Hamilton Square, NJ water hardness

Tap water hardness
50mg/L
2.9gpg
Soft

Reported by Aqua NJ - Hamilton Square · September 2025

NJ typical
80 mg/L
EPA health violations since 2016
0
Data
Utility report

Hamilton Square water measures 50 mg/L (2.9 gpg) of hardness, soft by USGS standards. The number comes from Aqua NJ - Hamilton Square, dated September 2025.

Hamilton Square on the hardness scale, with nearby cities
060120180240300360+NJ typical 80Mercerville: 75 mg/LMercerville 75Yardville: 75 mg/LYardville 75White Horse: 80 mg/LWhite Horse 80Trenton: 80 mg/LTrenton 80Heathcote: 82 mg/LHeathcote 82Dayton: 82 mg/LDayton 82Kendall Park: 82 mg/LKendall Park 82Monmouth Junction: 99 mg/LMonmouth Junction 99Princeton Meadows: 100 mg/LPrinceton Meadows 100Princeton: 100 mg/LPrinceton 100Hamilton Square 50mg/L as calcium carbonate060120180240300360+NJ 80Mercerville: 75 mg/LMercerville 75Yardville: 75 mg/LYardville 75White Horse: 80 mg/LWhite Horse 80Trenton: 80 mg/LTrenton 80Princeton Meadows: 100 mg/LPrinceton. 100Princeton: 100 mg/LPrinceton 10050 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 50 mg/L, Hamilton Square is 30 mg/L below the typical New Jersey figure of 80. None of the 10 nearest cities we track has softer water. The range nearby runs from 75 mg/L in Mercerville to 100 in Princeton Meadows.

What 50 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 50 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 Hamilton Square's water system

Aqua NJ - Hamilton Square · PWSID NJ1103001

No health-based violations since 2016

Serves about 39,128 people from surface water.

Health-based
0
Monitoring or reporting
22
Open now
2

TapWaterData ties Hamilton Square to this system. EPA's service-area records do not name Hamilton Square, 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 Hamilton Square water hard?

No. It measures about 50 mg/L (2.9 grains per gallon), which the USGS classes as soft.

What is the water hardness in Hamilton Square in grains per gallon?

About 2.9 gpg. One grain per gallon equals 17.1 mg/L, so 50 mg/L divided by 17.1 gives 2.9.

Has the Hamilton Square water system had EPA violations?

EPA records show no health-based violations for Aqua NJ - Hamilton Square since 2016. There were also 22 monitoring or reporting violations, 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, September 30, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.