Spring Valley Water Hardness & Quality Report (2026)
Water Hardness
21.8 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
1170.8 mg/L
Est. Daily Cost
$1.00
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Spring Valley, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Spring Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 1.5 yrs | 8.5 yrs | -82% |
| Washing Machine | 3 yrs | 12 yrs | -75% |
| Water Heater | 5 yrs | 15 yrs | -67% |
Regional Water Comparison
How Spring Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Spring Valley, Nevada | 373.5 mg/L | 4.1 ppt | 🔴 Very Hard | groundwater |
| Enterprise, Nevada | 161.5 mg/L | 2.5 ppt | 🟠 Hard | groundwater |
| Summerlin South, Nevada | 414.5 mg/L | 4.4 ppt | 🔴 Very Hard | groundwater |
| Paradise, Nevada | 316.5 mg/L | 3.6 ppt | 🔴 Very Hard | groundwater |
| Las Vegas, Nevada | 253.5 mg/L | 3.2 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Spring Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Spring Valley | 373.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Spring Valley's Water Unique?
Local geology and source profile
Spring Valley, Nevada, an unincorporated community in Clark County, receives its water supply through the Las Vegas Valley Water District (LVVWD) and the Southern Nevada Water Authority (SNWA). The SNWA blends treated Colorado River water from Lake Mead — delivered via the intake tunnels near Hoover Dam — with locally pumped groundwater from the Las Vegas Valley Groundwater Basin to supply the Spring Valley area in the southwest Las Vegas Valley. Water is treated at the Alfred Merritt Smith Water Treatment Facility and the River Mountains Water Treatment Facility before distribution. Water hardness in Spring Valley reaches 373.5 mg/L — classified as very hard and characteristic of the greater Las Vegas Valley supply.
Spring Valley's very hard supply reflects the combined geological character of the Las Vegas Basin and the Colorado River source. The Las Vegas Valley Groundwater Basin is filled with Quaternary and Tertiary alluvial sediments deposited from surrounding mountain ranges — Spring and Sheep Mountains to the north and west, the McCullough Range to the south — and these basin-fill materials overlie Paleozoic carbonate basement, including the highly soluble Cambrian Bonanza King Dolomite. Groundwater circulating through this carbonate basement accumulates very high dissolved calcium and magnesium. Colorado River water, already mineralised from canyon geology, contributes additional hardness when blended with basin groundwater.
At 373.5 mg/L, Spring Valley households face the extreme scale management demands characteristic of the Las Vegas Valley. Bathroom surfaces, shower screens, and faucet hardware accumulate visible calcium deposits rapidly — regular cleaning with descaling products is a standard household chore. Water heaters experience heavy element scaling without annual professional descaling, and dishwashers consistently produce mineral-spotted glassware without rinse-aid. A whole-house water softener is widely considered essential for Spring Valley residents to maintain appliances and plumbing in normal working condition over the long term.
Geology & Source: Groundwater from the Las Vegas Valley Groundwater Basin beneath Clark County — deep alluvial basin fill over Paleozoic Cambrian Bonanza King Dolomite and Devonian Nevada Formation carbonate basement contributes extreme dissolved calcium and magnesium, producing very hard supply at 373.5 mg/L in the southwest Las Vegas Valley.