How hard is the water in Cumberland County, PA?
16.8 grains per gallon
A softener will pay its way here.
The median hardness measured in Cumberland County, PA is 288 mg/L as calcium carbonate, which is 16.8 gpg. That is very hard on the USGS scale. It comes from 70 samples at 41 sites between 1991 and 2026, drawn from groundwater wells, which is what most taps and private wells in the county draw on.
How much it varies here
Half the sites came in between 15.5 and 18.8 gpg. The whole middle of that range gives the same answer, so a test of your own tap is unlikely to change it. Confidence in the county figure: high (how it is measured).
What to do next
At 16.8 gpg a softener pays its way here. Before you buy, check the quoted unit's grain capacity against the sizing table below, and ask whether it regenerates on demand, which uses less salt than a timer. Call your utility for its own report if you are on city water.
More on sizing a softener for your household.
From 0.4 to 25.0 gpg
The softest single sample on record in Cumberland County was 6 mg/L and the hardest 428.5 mg/L, a 71-fold gap. The top quarter of sites read above 18.8 gpg and the bottom quarter below 15.5 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 16.8 gpg, rivers and lakes 9.1 gpg
70 groundwater samples from 41 wells put the median at 288 mg/L. 1,229 surface samples from 130 sites put it at 156 mg/L. In Cumberland County the wells come out 7.7 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. A utility here that draws from the river can deliver noticeably different water from a private well next door.
What a softener would cost to run
For a household of 3, a 24,000-grain unit covers a week between regenerations. Expect about 367 lb of salt a year (10 bags of 40 lb, about $66), and roughly 2,346 gallons of regeneration water. Installed, most units run $1,000 to $4,500; spread over 15 years with salt, that is about $166 a year.
Sizing at 16.8 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,008 | 24,000 | 123 lb |
| 2 | 2,016 | 24,000 | 245 lb |
| 4 | 4,032 | 32,000 | 491 lb |
| 6 | 6,048 | 48,000 | 736 lb |
Cumberland County against the rest of Pennsylvania
Among the 67 Pennsylvania counties with data, Cumberland County is number 14 of 67 counting from the hardest. Across the whole country it is harder than 75% of counties.
Softest in Pennsylvania: Cameron County at 1.4 gpg. Hardest: Clarion County at 68.2 gpg. Closest to Cumberland County: Bedford County (16.6), Lebanon County (16.4), Indiana County (15.9).