How hard is the water in Greene County, PA?
62.5 grains per gallon
A softener will pay its way here.
The median hardness measured in Greene County, PA is 1070 mg/L as calcium carbonate, which is 62.5 gpg. That is very hard on the USGS scale. It comes from 11 samples at 11 sites between 1992 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 26.9 and 99 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: medium (how it is measured).
What to do next
At 62.5 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 6.1 to 139.0 gpg
The softest single sample on record in Greene County was 104 mg/L and the hardest 2,380 mg/L, a 23-fold gap. The top quarter of sites read above 99 gpg and the bottom quarter below 26.9 gpg.
Wells 62.5 gpg, rivers and lakes 6.3 gpg
11 groundwater samples from 11 wells put the median at 1070 mg/L. 2,072 surface samples from 163 sites put it at 107 mg/L. In Greene County the wells come out 56.2 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 80,000-grain unit covers a week between regenerations. Expect about 1,365 lb of salt a year (35 bags of 40 lb, about $246), 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 $346 a year.
Sizing at 62.5 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 3,750 | 32,000 | 456 lb |
| 2 | 7,500 | 64,000 | 913 lb |
| 4 | 15,000 | twin tank | 1,825 lb |
| 6 | 22,500 | twin tank | 2,738 lb |
Greene County against the rest of Pennsylvania
Among the 67 Pennsylvania counties with data, Greene County is number 2 of 67 counting from the hardest. Across the whole country it is harder than 98% of counties.
Softest in Pennsylvania: Cameron County at 1.4 gpg. Hardest: Clarion County at 68.2 gpg. Closest to Greene County: Clarion County (68.2), Clearfield County (38.5), Armstrong County (31.7).