How hard is the water in North Attleborough, MA?

Tap water hardness
71mg/L
4.2gpg
Moderately hard

Reported by North Attleboro Water Dept · April 2025

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

The water in North Attleborough carries roughly 71 mg/L of dissolved calcium and magnesium, or 4.2 grains per gallon. That is moderately hard water. The number comes from North Attleboro Water Dept, dated April 2025.

North Attleborough on the hardness scale, with nearby cities
060120180240300360+MA typical 38Milford: 37 mg/LMilford 37Norwood: 46 mg/LNorwood 46Sharon: 47 mg/LSharon 47Taunton: 47 mg/LTaunton 47Foxborough: 48 mg/LFoxborough 48Mansfield Center: 50 mg/LMansfield Center 50Attleboro: 56 mg/LAttleboro 56Walpole: 66 mg/LWalpole 66Franklin: 69 mg/LFranklin 69Medfield: 95 mg/LMedfield 95North Attleborough 71mg/L as calcium carbonate060120180240300360+MA 38Sharon: 47 mg/LSharon 47Foxborough: 48 mg/LFoxborough 48Mansfield Center: 50 mg/LMansfield. 50Attleboro: 56 mg/LAttleboro 56Walpole: 66 mg/LWalpole 66Franklin: 69 mg/LFranklin 6971 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

North Attleborough sits 33 mg/L above the typical Massachusetts figure of 38. Of the 10 nearest cities we track, 9 have softer water and 1 has harder. The range nearby runs from 37 mg/L in Milford to 95 in Medfield.

What 71 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 North Attleborough

3 people × 75 gallons a day × 4.2 gpg = 936 grains a day. A 24,000-grain unit regenerates about every 25 days.

Size it for your household

EPA record for North Attleborough's water system

North Attleboro Water Dept · PWSID MA4211000

No health-based violations since 2016

Serves about 31,410 people from groundwater.

Health-based
0
Monitoring or reporting
2
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 North Attleborough water hard?

Somewhat. It measures about 71 mg/L (4.2 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in North Attleborough in grains per gallon?

About 4.2 gpg. One grain per gallon equals 17.1 mg/L, so 71 mg/L divided by 17.1 gives 4.2.

What size water softener do I need in North Attleborough?

For 3 people using 75 gallons each per day, 4.2 gpg works out to about 936 grains a day. A 24,000-grain softener covers that with a regeneration about every 25 days.

Has the North Attleborough water system had EPA violations?

EPA records show no health-based violations for North Attleboro Water Dept since 2016. There were also 2 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 104 cities in Massachusetts

Hardness data: TapWaterData US Water Hardness (utility report, April 23, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.