How hard is the water in Collingswood, NJ?

Tap water hardness
97mg/L
5.7gpg
Moderately hard

Reported by Collingswood Water Depar · December 2023

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

Tap water in Collingswood has about 97 mg/L of hardness, which is 5.7 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from Collingswood Water Depar, dated December 2023.

Collingswood on the hardness scale, with nearby cities
060120180240300360+NJ typical 80Cherry Hill Mall: 78 mg/LCherry Hill Mall 78Audubon: 82 mg/LAudubon 82Camden: 82 mg/LCamden 82Haddon Heights: 82 mg/LHaddon Heights 82Haddonfield: 82 mg/LHaddonfield 82Bellmawr: 82 mg/LBellmawr 82Barrington: 82 mg/LBarrington 82Ellisburg: 82 mg/LEllisburg 82Runnemede: 82 mg/LRunnemede 82Westmont: 101 mg/LWestmont 101Collingswood 97mg/L as calcium carbonate060120180240300360+NJ 80Audubon: 82 mg/LAudubon 82Camden: 82 mg/LCamden 82Haddon Heights: 82 mg/LHaddon Hei. 82Haddonfield: 82 mg/LHaddonfield 82Bellmawr: 82 mg/LBellmawr 82Westmont: 101 mg/LWestmont 10197 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 97 mg/L, Collingswood is 17 mg/L above the typical New Jersey figure of 80. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 78 mg/L in Cherry Hill Mall to 101 in Westmont.

What 97 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 Collingswood

3 people × 75 gallons a day × 5.7 gpg = 1,278 grains a day. A 24,000-grain unit regenerates about every 18 days.

Size it for your household

EPA record for Collingswood's water system

Collingswood Water Depar · PWSID NJ0412001

No health-based violations since 2016

Serves about 24,500 people from groundwater.

Health-based
0
Monitoring or reporting
1
Open now
0

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

Somewhat. It measures about 97 mg/L (5.7 grains per gallon), which the USGS classes as moderately hard.

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

About 5.7 gpg. One grain per gallon equals 17.1 mg/L, so 97 mg/L divided by 17.1 gives 5.7.

What size water softener do I need in Collingswood?

For 3 people using 75 gallons each per day, 5.7 gpg works out to about 1,278 grains a day. A 24,000-grain softener covers that with a regeneration about every 18 days.

Has the Collingswood water system had EPA violations?

EPA records show no health-based violations for Collingswood Water Depar 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, December 11, 2023), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.