Boulder City Water Hardness & Quality Report (2026)
Water Hardness
26.5 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.009 mg/L
✓ Below action level
TDS
1533.7 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 Boulder City, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Boulder City | 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 Boulder City compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Boulder City, Nevada | 453.5 mg/L | 4.7 ppt | 🔴 Very Hard | groundwater |
| Henderson, Nevada | 410 mg/L | 4.4 ppt | 🔴 Very Hard | groundwater |
| Whitney, Nevada | 316 mg/L | 3.6 ppt | 🔴 Very Hard | groundwater |
| Winchester, Nevada | 351.5 mg/L | 3.9 ppt | 🔴 Very Hard | groundwater |
| Sunrise Manor, Nevada | 439 mg/L | 4.6 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Boulder City compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Boulder City | 453.5 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Boulder City's Water Unique?
Local geology and source profile
Boulder City, Nevada, in Clark County — a Clark County city adjacent to Henderson and Las Vegas near Hoover Dam on Lake Mead in southeast Nevada — receives its municipal water from the Southern Nevada Water Authority (SNWA) or direct Bureau of Reclamation supply, drawing directly from Lake Mead (Colorado River, Clark County) through the SNWA delivery system.
The extremely hard 453.5 mg/L hardness and extremely high TDS of 1533.7 mg/L reflect the Las Vegas-Clark County Lake Mead supply's intensely evaporitic Colorado River character — Boulder City sits directly at the Lake Mead intake, receiving water at its most concentrated before any blending or dilution. The Colorado River (Lake Mead) drains the Colorado Plateau — Permian Kaibab Limestone (calcareous — primary hardness contributor), Triassic Moenkopi Formation (evaporitic gypsum — major TDS contributor), Permian Supai Group (evaporitic — gypsum and halite), and Permian Coconino Sandstone (minor calcareous). The Permian evaporitic Colorado Plateau loading drives the Clark County water to extreme hardness and TDS.
At 453.5 mg/L with TDS 1534, Boulder City's water is extremely hard. A water softener and reverse osmosis system are essential. Scale forms almost immediately on all surfaces, appliances fail rapidly without treatment, and drinking water requires filtration. The PFAS level of 4.7 ppt warrants a certified drinking water filter — the Colorado River PFAS background from Lake Powell-Colorado Plateau sources and the Clark County Las Vegas industrial corridor contribute to Boulder City's readings.
Geology & Source: Boulder City in Clark County draws from the Southern Nevada Water Authority on Lake Mead (Clark County, southeast Nevada) — Lake Mead impounds the Colorado River draining the Rocky Mountains (Permian Kaibab Limestone, Triassic Moenkopi evaporitic, Permian Supai evaporitic) — Nevada Clark County Lake Mead Colorado River Permian-Triassic evaporitic watershed produces extremely hard water at 453.5 mg/L with TDS 1533.7 mg/L.