Hard water in Fullerton, PA
Reported by Lca Allentown Division · 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 Fullerton has about 158 mg/L of hardness, which is 9.2 grains per gallon. On the USGS scale that counts as hard. The number comes from Lca Allentown Division, dated October 2025.
At 158 mg/L, Fullerton is 31 mg/L above the typical Pennsylvania figure of 127. Of the 10 nearest cities we track, 5 have softer water and 5 have harder. The range nearby runs from 20 mg/L in Nazareth to 240 in Wescosville.
What 158 mg/L means at home
Expect white crust on faucets and showerheads, plus spots on dishes that come out of the dishwasher.
Kettles collect scale quickly. Water heaters build up sediment at the bottom of the tank, which makes them work harder over time.
Soap and detergent need a little more to lather, and soap scum shows up in the tub.
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
At 158 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 9.2 gpg = 2,077 grains a day. A 24,000-grain unit regenerates about every 11 days.
EPA record for Fullerton's water system
No health-based violations since 2016
Serves about 118,000 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 5
- Open now
- 0
TapWaterData ties Fullerton to this system. EPA's service-area records do not name Fullerton, 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 Fullerton water hard?
Yes. It measures about 158 mg/L (9.2 grains per gallon), which the USGS classes as hard.
What is the water hardness in Fullerton in grains per gallon?
About 9.2 gpg. One grain per gallon equals 17.1 mg/L, so 158 mg/L divided by 17.1 gives 9.2.
What size water softener do I need in Fullerton?
For 3 people using 75 gallons each per day, 9.2 gpg works out to about 2,077 grains a day. A 24,000-grain softener covers that with a regeneration about every 11 days.
Has the Fullerton water system had EPA violations?
EPA records show no health-based violations for Lca Allentown Division since 2016. There were also 5 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Northampton57 mg/LSoft
- Dorneyville192 mg/LVery hard
- Bethlehem63 mg/LModerately hard
- Wescosville240 mg/LVery hard
- Emmaus191 mg/LVery hard
- Hellertown63 mg/LModerately hard
- Ancient Oaks240 mg/LVery hard
- Breinigsville240 mg/LVery hard
- Nazareth20 mg/LSoft
- Wilson50 mg/LSoft
All 172 cities in Pennsylvania
Hardness data: TapWaterData US Water Hardness (utility report, October 12, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.