How hard is the water in Souderton, 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

The water in Souderton carries roughly 64 mg/L of dissolved calcium and magnesium, or 3.7 grains per gallon. That is moderately hard water. The number comes from North Penn Water Authority, dated October 2025.

Souderton on the hardness scale, with nearby cities
060120180240300360+PA typical 127Montgomeryville: 57 mg/LMontgomeryville 57Lansdale: 61 mg/LLansdale 61Harleysville: 64 mg/LHarleysville 64Kulpsville: 64 mg/LKulpsville 64Maple Glen: 75 mg/LMaple Glen 75Spring House: 84 mg/LSpring House 84Blue Bell: 94 mg/LBlue Bell 94Trooper: 125 mg/LTrooper 125Doylestown: 145 mg/LDoylestown 145Perkasie: 289 mg/LPerkasie 289Souderton 64mg/L as calcium carbonate060120180240300360+PA 127Montgomeryville: 57 mg/LMontgomery. 57Lansdale: 61 mg/LLansdale 61Harleysville: 64 mg/LHarleysvil. 64Kulpsville: 64 mg/LKulpsville 64Doylestown: 145 mg/LDoylestown 145Perkasie: 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

Souderton 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 Souderton

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 Souderton'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 Souderton to this system. EPA's service-area records do not name Souderton, 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 Souderton 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 Souderton 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 Souderton?

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 Souderton 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.