Water hardness in Las Vegas
16.4 gpg very hard
Tap water in Las Vegas is very hard: 16.4 gpg (280 mg/L · 15.7 °dH · 28 °fH).
Source: LVVWD Water Quality Report 2026 (Las Vegas Valley) (2026) · data checked 2026-10-19
The Las Vegas Valley Water District tells customers to set water softeners for 280 mg/L, or 16.4 gpg, in its 2026 report. The supply is Colorado River water from Lake Mead, which is very hard. Henderson and North Las Vegas have separate utilities and are not covered by this figure. Scale builds quickly on heaters and fixtures.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 16.4 gpg |
|---|---|
| Utility | Las Vegas Valley Water District (LVVWD; SNWA is regional wholesaler) |
How Las Vegas compares
- Tap water in Las Vegas is 81 % harder than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 288 of 1372 in the United States (1 = hardest); 78 % of these cities have softer water.
- In Nevada it is number 2 of 4 cities; the regional median is 15.9 gpg.
Ranking of the hardest and softest water in the United States →
What it means at home
- Severe scale: heater elements and washing-machine heaters fail early.
- Detergent use is very high; taps and screens coat within days.
- Dishwasher at maximum salt setting.
- An ion-exchange softener is practically essential; RO for drinking water.
How much salt will you use for softening?
Yes. At this hardness a softener pays for itself through appliance life and detergent.
Descale a coffee machine or kettle about every 1 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in Las Vegas
| Brand | Setting for this water |
|---|---|
| Bosch | H04 |
| Miele | 16 °dH |
| AEG / Electrolux | 4 |
| Beko | 4th |
| Hoover | S2 |
| LG | H3 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is Las Vegas water hard or soft?
It is very hard: 280 mg/L as CaCO₃ (16.4 gpg, 15.7 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in Las Vegas safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is Las Vegas water?
16.4 gpg, equal to 15.7 °dH, 28 °fH or 280 mg/L calcium carbonate.
What dishwasher salt setting should I use in Las Vegas?
For 280 mg/L (15.7 °dH) check your manufacturer's table: maximum level (5–7).
Do I need a water softener in Las Vegas?
Yes, unless you are only passing through: scale damages appliances within a few years.
Source
Source: LVVWD Water Quality Report 2026 (Las Vegas Valley) (2026). Method: figure published by the water supplier. LVVWD Water Quality Report 2026 (Las Vegas Valley) · Outdated figure? Tell us