Northfield, NJ water hardness

Tap water hardness
21mg/L
1.2gpg
Soft

Reported by NJ American Water - Atlantic County · July 2025

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

Tap water in Northfield has about 21 mg/L of hardness, which is 1.2 grains per gallon. On the USGS scale that counts as soft. The number comes from NJ American Water - Atlantic County, dated July 2025.

Northfield on the hardness scale, with nearby cities
060120180240300360+NJ typical 80Atlantic City: 12 mg/LAtlantic City 12Brigantine: 20 mg/LBrigantine 20Bargaintown: 21 mg/LBargaintown 21Linwood: 21 mg/LLinwood 21Pleasantville: 21 mg/LPleasantville 21Somers Point: 21 mg/LSomers Point 21Absecon: 21 mg/LAbsecon 21Pomona: 21 mg/LPomona 21Smithville: 21 mg/LSmithville 21Margate City: 33 mg/LMargate City 33Northfield 21mg/L as calcium carbonate060120180240300360+NJ 80Bargaintown: 21 mg/LBargaintown 21Linwood: 21 mg/LLinwood 21Pleasantville: 21 mg/LPleasantvi. 21Somers Point: 21 mg/LSomers Poi. 21Absecon: 21 mg/LAbsecon 21Margate City: 33 mg/LMargate Ci. 3321 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Northfield sits 59 mg/L below the typical New Jersey figure of 80. Of the 10 nearest cities we track, 2 have softer water and 1 has harder. The range nearby runs from 12 mg/L in Atlantic City to 33 in Margate City.

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 Northfield's water system

NJ American Water - Atlantic County · PWSID NJ0119002

No health-based violations since 2016

Serves about 120,146 people from groundwater.

Health-based
0
Monitoring or reporting
1
Open now
0

TapWaterData ties Northfield to this system. EPA's service-area records do not name Northfield, 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 Northfield 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 Northfield 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 Northfield water system had EPA violations?

EPA records show no health-based violations for NJ American Water - Atlantic County 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, July 1, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.