How hard is the water in Ramsey County, MN?
13.1 grains per gallon
A softener will pay its way here.
The median hardness measured in Ramsey County, MN is 224 mg/L as calcium carbonate, which is 13.1 gpg. That is very hard on the USGS scale. It comes from 32 samples at 30 sites between 1990 and 2025, 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 9.1 and 23 gpg. That spread crosses a decision line, so some homes here land on a different answer. A $10 test strip on your own tap settles it. Confidence in the county figure: high (how it is measured).
What to do next
At 13.1 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. Because Ramsey County straddles a decision line, check your own tap with a $10 test strip before you spend anything.
More on sizing a softener for your household.
From 3.5 to 33.2 gpg
The softest single sample on record in Ramsey County was 60.6 mg/L and the hardest 568 mg/L, a 9-fold gap. The top quarter of sites read above 23 gpg and the bottom quarter below 9.1 gpg.
Wells 13.1 gpg, rivers and lakes 6.6 gpg
32 groundwater samples from 30 wells put the median at 223.5 mg/L. 10,550 surface samples from 68 sites put it at 113.5 mg/L. In Ramsey County the wells come out 6.5 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 285 lb of salt a year (8 bags of 40 lb, about $51), 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 $151 a year.
Sizing at 13.1 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 786 | 24,000 | 96 lb |
| 2 | 1,572 | 24,000 | 191 lb |
| 4 | 3,144 | 24,000 | 383 lb |
| 6 | 4,716 | 40,000 | 574 lb |
Ramsey County against the rest of Minnesota
Among the 87 Minnesota counties with data, Ramsey County is number 65 of 87 counting from the hardest. Across the whole country it is harder than 62% of counties.
Softest in Minnesota: Lake County at 1.3 gpg. Hardest: Traverse County at 42.6 gpg. Closest to Ramsey County: Cass County (13), Douglas County (13), Kandiyohi County (13.4).