Hard water in New Castle, PA

Tap water hardness
166mg/L
9.7gpg
Hard

Reported by PA Amer Water CO Ellwood Cty · November 2025

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

New Castle water measures 166 mg/L (9.7 gpg) of hardness, hard by USGS standards. The number comes from PA Amer Water CO Ellwood Cty, dated November 2025.

New Castle on the hardness scale, with nearby cities
060120180240300360+PA typical 127Franklin Park: 82 mg/LFranklin Park 82West View: 82 mg/LWest View 82Bellevue: 82 mg/LBellevue 82McKees Rocks: 82 mg/LMcKees Rocks 82Allison Park: 88 mg/LAllison Park 88Glenshaw: 88 mg/LGlenshaw 88Oakmont: 90 mg/LOakmont 90Fox Chapel: 102 mg/LFox Chapel 102Crafton: 102 mg/LCrafton 102Ellwood City: 166 mg/LEllwood City 166New Castle 166mg/L as calcium carbonate060120180240300360+PA 127Franklin Park: 82 mg/LFranklin P. 82West View: 82 mg/LWest View 82Bellevue: 82 mg/LBellevue 82Allison Park: 88 mg/LAllison Pa. 88Glenshaw: 88 mg/LGlenshaw 88Ellwood City: 166 mg/LEllwood Ci. 166166 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 166 mg/L, New Castle is 39 mg/L above the typical Pennsylvania figure of 127. None of the 10 nearest cities we track has harder water. The range nearby runs from 82 mg/L in Franklin Park to 166 in Ellwood City.

What 166 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 166 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.

Softener size for New Castle

3 people × 75 gallons a day × 9.7 gpg = 2,185 grains a day. A 24,000-grain unit regenerates about every 10 days.

Size it for your household

EPA record for New Castle's water system

PA Amer Water CO Ellwood Cty · PWSID PA6370011

No health-based violations since 2016

Serves about 17,200 people from surface water.

Health-based
0
Monitoring or reporting
4
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 New Castle water hard?

Yes. It measures about 166 mg/L (9.7 grains per gallon), which the USGS classes as hard.

What is the water hardness in New Castle in grains per gallon?

About 9.7 gpg. One grain per gallon equals 17.1 mg/L, so 166 mg/L divided by 17.1 gives 9.7.

What size water softener do I need in New Castle?

For 3 people using 75 gallons each per day, 9.7 gpg works out to about 2,185 grains a day. A 24,000-grain softener covers that with a regeneration about every 10 days.

Has the New Castle water system had EPA violations?

EPA records show no health-based violations for PA Amer Water CO Ellwood Cty since 2016. There were also 4 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 172 cities in Pennsylvania

Hardness data: TapWaterData US Water Hardness (utility report, November 6, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.