How hard is the water in Harleysville, PA?

Tap water hardness
64mg/L
3.7gpg
Moderately hard

Reported by North Penn Water Authority · October 2025

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

Tap water in Harleysville has about 64 mg/L of hardness, which is 3.7 grains per gallon. On the USGS scale that counts as moderately hard. The number comes from North Penn Water Authority, dated October 2025.

Harleysville on the hardness scale, with nearby cities
060120180240300360+PA typical 127Montgomeryville: 57 mg/LMontgomeryville 57Lansdale: 61 mg/LLansdale 61Kulpsville: 64 mg/LKulpsville 64Souderton: 64 mg/LSouderton 64Blue Bell: 94 mg/LBlue Bell 94Sanatoga: 106 mg/LSanatoga 106Trooper: 125 mg/LTrooper 125Audubon: 125 mg/LAudubon 125Norristown: 125 mg/LNorristown 125Perkasie: 289 mg/LPerkasie 289Harleysville 64mg/L as calcium carbonate060120180240300360+PA 127Montgomeryville: 57 mg/LMontgomery. 57Lansdale: 61 mg/LLansdale 61Kulpsville: 64 mg/LKulpsville 64Souderton: 64 mg/LSouderton 64Trooper: 125 mg/LTrooper 125Perkasie: 289 mg/LPerkasie 28964 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

Harleysville sits 63 mg/L below the typical Pennsylvania figure of 127. Of the 10 nearest cities we track, 2 have softer water and 6 have harder. The range nearby runs from 57 mg/L in Montgomeryville to 289 in Perkasie.

What 64 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 Harleysville

3 people × 75 gallons a day × 3.7 gpg = 839 grains a day. A 24,000-grain unit regenerates about every 28 days.

Size it for your household

EPA record for Harleysville's water system

North Penn Water Authority · PWSID PA1460034

No health-based violations since 2016

Serves about 91,941 people from surface water.

Health-based
0
Monitoring or reporting
0
Open now
0

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

Somewhat. It measures about 64 mg/L (3.7 grains per gallon), which the USGS classes as moderately hard.

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

About 3.7 gpg. One grain per gallon equals 17.1 mg/L, so 64 mg/L divided by 17.1 gives 3.7.

What size water softener do I need in Harleysville?

For 3 people using 75 gallons each per day, 3.7 gpg works out to about 839 grains a day. A 24,000-grain softener covers that with a regeneration about every 28 days.

Has the Harleysville water system had EPA violations?

EPA records show no health-based violations for North Penn Water Authority since 2016.

Nearby cities

All 172 cities in Pennsylvania

Hardness data: TapWaterData US Water Hardness (utility report, October 13, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.