How hard is the water in Clark County, NV?
20.2 grains per gallon
A softener will pay its way here.
The median hardness measured in Clark County, NV is 345 mg/L as calcium carbonate, which is 20.2 gpg. That is very hard on the USGS scale. It comes from 232 samples at 141 sites between 1990 and 2022, 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 13.6 and 47.4 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 20.2 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 0.6 to 226.1 gpg
The softest single sample on record in Clark County was 11.1 mg/L and the hardest 3,870 mg/L, a 349-fold gap. The top quarter of sites read above 47.4 gpg and the bottom quarter below 13.6 gpg. So even here some sites draw water soft enough to need nothing at all.
Wells 20.2 gpg, rivers and lakes 17.7 gpg
232 groundwater samples from 141 wells put the median at 345 mg/L. 895 surface samples from 49 sites put it at 302.5 mg/L. In Clark County the wells come out 2.5 gpg harder. Groundwater sits in contact with rock for years and picks up calcium and magnesium as it goes, so wells usually read harder. The two sources are close, so the county figure should hold whichever one your tap is on.
What a softener would cost to run
For a household of 3, a 32,000-grain unit covers a week between regenerations. Expect about 440 lb of salt a year (12 bags of 40 lb, about $79), 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 $179 a year.
Sizing at 20.2 gpg
| People | Grains a day | Unit | Salt a year |
|---|---|---|---|
| 1 | 1,212 | 24,000 | 147 lb |
| 2 | 2,424 | 24,000 | 295 lb |
| 4 | 4,848 | 40,000 | 590 lb |
| 6 | 7,272 | 64,000 | 885 lb |
Clark County against the rest of Nevada
Among the 17 Nevada counties with data, Clark County is the hardest. Across the whole country it is harder than 84% of counties.
Softest in Nevada: Churchill County at 3.2 gpg. Closest to Clark County: Esmeralda County (19.5), Lincoln County (11.9), Nye County (11.6).