Summerlin South Water Hardness & Quality Report (2026)
Water Hardness
180+ mg/L
Very Hardestimated · not lab-verified
Source
groundwater
pH Level
8.2
neutral = 7.0
Lead
0.008 mg/L
✓ Below action level
TDS
90 mg/L
Est. Daily Cost
$0.91
energy & soap waste
Source: See methodology section below · 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 Summerlin South, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Summerlin South | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.7 yrs | 8.5 yrs | -45% |
| Washing Machine | 6.6 yrs | 12 yrs | -45% |
| Water Heater | 8.3 yrs | 15 yrs | -45% |
Regional Water Comparison
How Summerlin South compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Summerlin South, Nevada | ≈ 180+ mg/L | 4.4 ppt | 🔴 Very Hard | groundwater |
| Spring Valley, Nevada | ≈ 180+ mg/L | 4.1 ppt | 🔴 Very Hard | reservoir |
| Enterprise, Nevada | ≈ 180+ mg/L | 2.5 ppt | 🔴 Very Hard | reservoir |
| Paradise, Nevada | ≈ 120–179 mg/L | 3.6 ppt | 🟠 Hard | reservoir |
| Las Vegas, Nevada | ≈ 180+ mg/L | 400 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Summerlin South compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Summerlin South | ≈ 180+ mg/L | 🔴 High |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Summerlin South's Water Unique?
Local geology and source profile
Summerlin South in Clark County, Nevada is served by the Las Vegas Valley Water District (LVVWD), part of the Southern Nevada Water Authority (SNWA). The primary water source is Lake Mead reservoir on the Colorado River, supplemented by minor groundwater inputs. Finished water is produced at two main facilities: the River Mountains Water Treatment Complex and the Basic Management Inc. Treatment Plant, which together serve the greater Las Vegas Valley including the Summerlin communities in western Las Vegas.
The Colorado River Basin watershed spans the Rocky Mountains to the Mojave Desert, with river water picking up minerals from limestone and dolomite formations including the Redwall Limestone (Mississippian) and Supai Group (Pennsylvanian-Permian). Lake Mead stores this highly mineralized supply. The very hard character results from prolonged natural dissolution of calcium- and magnesium-bearing carbonate rocks as water traverses karst terrains across the basin.
Very hard water causes significant scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan. Fixtures develop chalky residue, soap lathers poorly, and skin may feel dry. Maintenance includes regular vinegar descaling, installing scale inhibitors, or a whole-home softening system sized for very hard water, paired with reverse osmosis for drinking water. LVVWD maintains pH at 7.5–8.0, meets Safe Drinking Water Act standards for lead/copper, reports no PFAS detections above limits, and adjusts fluoride to 0.7 mg/L.
Geology & Source: Colorado River watershed through Kaibab Limestone and Toroweap Formation (Paleozoic-Mesozoic); stored in Lake Mead — prolonged carbonate dissolution produces very hard water typical of arid basin supplies
Other Nevada Water Reports
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Frequently Asked Questions
Is Summerlin South's water safe to drink?
Do I need a water softener in Summerlin South?
How does Summerlin South compare to the USA average?
Data Sources & Methodology
Water quality data for Summerlin South is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.