Water Hardness in Nevada
Across 40 measured cities — with 17 more covered by labeled county-level estimates — Nevada's median tap water hardness is 102.0 mg/L (6.0 gpg): moderately hard on the USGS scale. Below: every covered city, the state's hardest and softest water, and the geology that explains it.
Data updated July 6, 2026. Sources: utility-reported water quality data and USGS/EPA Water Quality Portal samples.
Nevada Cities by Hardness Category
Measured cities only — labeled county estimates never enter the category counts or the median.
| Category | Range | Measured cities | Share |
|---|---|---|---|
| Soft | 0-60 mg/L | 12 | 30.0% |
| Moderately hard | 60-120 mg/L | 12 | 30.0% |
| Hard | 120-180 mg/L | 2 | 5.0% |
| Very hard | >180 mg/L | 14 | 35.0% |
Hardest and Softest Water in Nevada
Measured values only; labeled county estimates and values under active dispute never rank.
Hardest water in Nevada
- Spring Valley — 285.0 mg/L (16.7 gpg), very hard
- Henderson — 281.9 mg/L (16.5 gpg), very hard
- Las Vegas — 280.0 mg/L (16.4 gpg), very hard
- Boulder City — 270.1 mg/L (15.8 gpg), very hard
- Nellis Afb — 247.0 mg/L (14.4 gpg), very hard
Softest water in Nevada
- Fallon — 2.2 mg/L (0.1 gpg), soft
- Glenbrook — 9.9 mg/L (0.6 gpg), soft
- Incline Village — 9.9 mg/L (0.6 gpg), soft
- Kingsbury — 9.9 mg/L (0.6 gpg), soft
- Stateline — 9.9 mg/L (0.6 gpg), soft
Every Covered City in Nevada
All 57 covered Nevada cities, sorted by population served. "County estimate" rows are labeled context values from USGS/EPA Water Quality Portal county sampling — they never enter the median above. City names link to each city's full water quality page.
| City | Hardness (mg/L) | gpg | Category | Data |
|---|---|---|---|---|
| Spring Valley | 285.0 | 16.7 | Very hard | Utility-reported |
| Las Vegas | 280.0 | 16.4 | Very hard | Utility-reported |
| Sun Valley | 102.0 | 6.0 | Moderately hard | Utility-reported |
| Reno | 101.9 | 6.0 | Moderately hard | Utility-reported |
| Verdi | 101.9 | 6.0 | Moderately hard | Utility-reported |
| Golden Valley | 101.9 | 6.0 | Moderately hard | Utility-reported |
| Mogul | 101.9 | 6.0 | Moderately hard | Utility-reported |
| Lemmon Valley | 102.0 | 6.0 | Moderately hard | Utility-reported |
| Spanish Springs | 102.0 | 6.0 | Moderately hard | Utility-reported |
| Sparks | 102.0 | 6.0 | Moderately hard | Utility-reported |
| North Las Vegas | 232.0 | 13.6 | Very hard | Utility-reported |
| Henderson | 281.9 | 16.5 | Very hard | Utility-reported |
| Carson City | 120.0 | 7.0 | Moderately hard | Utility-reported |
| Pahrump | 59.2 | 3.5 | Soft | Computed from Ca+Mg |
| Fernley | 210.0 | 12.3 | Very hard | Utility-reported |
| Elko | 28.2 | 1.6 | Soft | Computed from Ca+Mg |
| Paradise | 246.5 | 14.4 | Very hard | Utility-reported |
| Nellis Afb | 247.0 | 14.4 | Very hard | Utility-reported |
| Sunrise Manor | 247.0 | 14.4 | Very hard | Utility-reported |
| Whitney | 247.0 | 14.4 | Very hard | Utility-reported |
| Boulder City | 270.1 | 15.8 | Very hard | Computed from Ca+Mg |
| Dayton | 234.5 | 13.7 | Very hard | Computed from Ca+Mg |
| Fallon | 2.2 | 0.1 | Soft | Computed from Ca+Mg |
| Spring Creek | 31.4 | 1.8 | Soft | Computed from Ca+Mg |
| Gardnerville Ranchos | 97.0 | 5.7 | Moderately hard | Utility-reported |
| Incline Village | 9.9 | 0.6 | Soft | Computed from Ca+Mg |
| East Valley | 35.3 | 2.1 | Soft | Utility-reported |
| Indian Hills | 86.6 | 5.1 | Moderately hard | Utility-reported |
| Yerington | 47.4 | 2.8 | Soft | Computed from Ca+Mg |
| Silver Springs | 47.8 | 2.8 | Soft | Computed from Ca+Mg |
| Gardnerville | 174.0 | 10.2 | Hard | Utility-reported |
| Minden | 116.6 | 6.8 | Moderately hard | Utility-reported |
| Zephyr Cove | 30.5 | 1.8 | Soft | Utility-reported |
| Kingsbury | 9.9 | 0.6 | Soft | Computed from Ca+Mg |
| Stateline | 9.9 | 0.6 | Soft | Computed from Ca+Mg |
| Lovelock | 163.0 | 9.5 | Hard | Utility-reported |
| Tonopah | 231.0 | 13.5 | Very hard | County estimate |
| Virginia City | 109.0 | 6.4 | Moderately hard | County estimate |
| Hawthorne | 669.0 | 39.1 | Very hard | County estimate |
| Carlin | 196.6 | 11.5 | Very hard | Computed from Ca+Mg |
| Wellington | 97.0 | 5.7 | Moderately hard | County estimate |
| Wells | 124.0 | 7.3 | Hard | County estimate |
| Jackpot | 124.0 | 7.3 | Hard | County estimate |
| Winchester | 183.0 | 10.7 | Very hard | Utility-reported |
| Round Mountain | 231.0 | 13.5 | Very hard | County estimate |
| Caliente | 187.0 | 10.9 | Very hard | County estimate |
| Beatty | 231.0 | 13.5 | Very hard | County estimate |
| Glenbrook | 9.9 | 0.6 | Soft | Computed from Ca+Mg |
| Nixon | 72.4 | 4.2 | Moderately hard | County estimate |
| Crescent Valley | 202.0 | 11.8 | Very hard | County estimate |
| Eureka | 202.0 | 11.8 | Very hard | County estimate |
| Winnemucca | 103.0 | 6.0 | Moderately hard | County estimate |
| Jarbidge | 124.0 | 7.3 | Hard | County estimate |
| Lamoille | 124.0 | 7.3 | Hard | County estimate |
| Sandy Valley | 180.8 | 10.6 | Very hard | Computed from Ca+Mg |
| Blue Diamond | 408.0 | 23.9 | Very hard | County estimate |
| Mountain City | 124.0 | 7.3 | Hard | County estimate |
Above 120 mg/L (7 gpg), scale is usually worth treating — see our water softener guide, or size a system with the hardness calculator & converter.
The Geology Behind Nevada's Water Hardness
Nevada sits in the Mountain West basins and desert Southwest region.
Mountain snowmelt starts out soft, but across the interior West it drains into closed basins floored with carbonate and evaporite sediments, and the arid climate evaporates water faster than rain can dilute it. Rivers like the Colorado accumulate dissolved calcium and magnesium along their whole length, so the USGS maps most basin-and-range and desert-Southwest supplies as hard to very hard. Towns high in the mountains that capture snowmelt directly are the region's soft-water exceptions.
Nevada Water Hardness FAQ
Does Nevada have hard water?
On the whole, no — Nevada's statewide median sits below the hard threshold, though some cities run harder. The median is 102.0 mg/L (6.0 gpg) — moderately hard on the USGS scale, where anything above 120 mg/L (7 gpg) counts as hard. 16 of Nevada's 40 measured cities fall in the hard or very hard bands (40%), so check your own city rather than the state average.
How hard is tap water in Nevada?
Across the 40 Nevada cities with measured values in our index, the median hardness is 102.0 mg/L (6.0 gpg) — moderately hard on the USGS scale. Individual cities range from 2.2 to 285.0 mg/L, so check your own city rather than assuming the state number.
Which city in Nevada has the hardest water?
Spring Valley has the hardest measured tap water in our Nevada index at 285.0 mg/L (16.7 gpg) — very hard on the USGS scale. Rankings use measured utility values only; labeled county estimates and values under active dispute are excluded.
Do I need a water softener in Nevada?
16 of Nevada's 40 measured cities (40%) fall in the hard or very hard bands — above 120 mg/L (7 gpg), the level where most water treatment professionals suggest considering an ion-exchange softener. Hardness varies utility to utility, so look up your own city's value before sizing equipment.
How do I find my city's exact water hardness?
Enter your ZIP code in our free lookup at tapwaterdata.com/zip to see the value we hold for your Nevada city from utility-reported water quality data, check your water utility's annual Consumer Confidence Report (CCR), or use a home test-strip kit.
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