How hard is the water in Kendall Park, NJ?

Tap water hardness
82mg/L
4.8gpg
Moderately hard

Reported by South Brunswick TWP W Di · July 2025

NJ typical
80 mg/L
EPA health violations since 2016
1
Softener for 3 people
24k grain
Data
Utility report

Tap water in Kendall Park has about 82 mg/L of hardness, which is 4.8 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from South Brunswick TWP W Di, dated July 2025.

Kendall Park on the hardness scale, with nearby cities
060120180240300360+NJ typical 80Milltown: 66 mg/LMilltown 66Heathcote: 82 mg/LHeathcote 82Dayton: 82 mg/LDayton 82Monmouth Junction: 99 mg/LMonmouth Junction 99Princeton Meadows: 100 mg/LPrinceton Meadows 100Belle Mead: 100 mg/LBelle Mead 100Princeton: 100 mg/LPrinceton 100Blackwells Mills: 111 mg/LBlackwells Mills 111Franklin Park: 235 mg/LFranklin Park 235East Franklin: 235 mg/LEast Franklin 235Kendall Park 82mg/L as calcium carbonate060120180240300360+NJ 80Heathcote: 82 mg/LHeathcote 82Dayton: 82 mg/LDayton 82Monmouth Junction: 99 mg/LMonmouth J. 99Princeton Meadows: 100 mg/LPrinceton. 100Blackwells Mills: 111 mg/LBlackwells. 111Franklin Park: 235 mg/LFranklin P. 23582 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 82 mg/L, Kendall Park is close to the typical New Jersey figure of 80 mg/L. Of the 10 nearest cities we track, 1 has softer water and 7 have harder. The range nearby runs from 66 mg/L in Milltown to 235 in Franklin Park.

What 82 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 Kendall Park

3 people × 75 gallons a day × 4.8 gpg = 1,080 grains a day. A 24,000-grain unit regenerates about every 22 days.

Size it for your household

EPA record for Kendall Park's water system

South Brunswick TWP W Di · PWSID NJ1221004

1 health-based violation since 2016

Serves about 45,450 people from surface water.

Health-based
1
Monitoring or reporting
10
Open now
1

TapWaterData ties Kendall Park to this system. EPA's service-area records do not name Kendall Park, so check the utility printed on your water bill.

20162017201820192020202120222023202420252026Lead and Copper Rule'16'18'20'22'24'26Lead and Copper Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Lead and Copper Rulecorrosion control and lead sampling12022Resolved

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 Kendall Park water hard?

Somewhat. It measures about 82 mg/L (4.8 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in Kendall Park in grains per gallon?

About 4.8 gpg. One grain per gallon equals 17.1 mg/L, so 82 mg/L divided by 17.1 gives 4.8.

What size water softener do I need in Kendall Park?

For 3 people using 75 gallons each per day, 4.8 gpg works out to about 1,080 grains a day. A 24,000-grain softener covers that with a regeneration about every 22 days.

Has the Kendall Park water system had EPA violations?

EPA records show 1 health-based violation for South Brunswick TWP W Di since 2016, involving Lead and Copper Rule. There were also 10 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, July 19, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.