Sparks Water Hardness & Quality Report (2026)
Water Hardness
21.4 grains per gallon
Source
groundwater
pH Level
8.5
neutral = 7.0
Lead
0.007 mg/L
✓ Below action level
TDS
1139.3 mg/L
Est. Daily Cost
$0.98
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 Sparks, your appliances are currently losing 45% efficiency due to mineral buildup.
| Appliance | In Sparks | 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 Sparks compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Sparks, Nevada | 366 mg/L | 4 ppt | 🔴 Very Hard | groundwater |
| Reno, Nevada | 96.5 mg/L | 2 ppt | 🟡 Moderately Hard | groundwater |
| Sun Valley, Nevada | 433.5 mg/L | 4.6 ppt | 🔴 Very Hard | groundwater |
| Spanish Springs, Nevada | 361 mg/L | 4 ppt | 🔴 Very Hard | groundwater |
| Carson City, Nevada | 185.5 mg/L | 2.6 ppt | 🔴 Very Hard | groundwater |
National Benchmark
How Sparks compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Sparks | 366 mg/L | 🔴 High |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Sparks's Water Unique?
Local geology and source profile
Sparks, Nevada, in the Truckee Meadows at the foot of the Sierra Nevada in Washoe County, draws its municipal water supply through the Truckee Meadows Water Authority (TMWA), sourcing from the Truckee River (originating at Lake Tahoe in the Sierra Nevada and flowing through Reno and Sparks) via the Chalk Bluff Water Treatment Plant and Glendale Water Treatment Plant on the Truckee River, supplemented by Truckee Meadows Basin groundwater wells in Washoe County. Water hardness in Sparks reaches 366 mg/L — classified as extremely hard.
Sparks' extreme hardness — far higher than the soft Sierra Nevada Truckee River source would suggest — reflects the enormous mineral concentration from the Truckee Meadows valley aquifer system groundwater fraction. The Truckee Meadows Valley is a Basin-and-Range alluvial basin in the Great Basin desert, where valley fill sediments derived from the Virginia Range andesite and rhyolite (to the east) and Carson Range granodiorite (to the west) have been strongly modified by Quaternary lacustrine (lake) deposits from ancient Lake Lahontan. These Lahontan sediments — evaporite-influenced lake beds with calcareous marl, carbonate, and sulfate — contribute extremely high dissolved minerals to the Truckee Meadows groundwater. The Great Basin's extreme aridity concentrates groundwater minerals without the dilution available in wetter climates.
At 366 mg/L, Sparks residents face severe scale challenges throughout the home. Heavy calcium deposits form within days on all water-exposed surfaces. Water heaters require frequent professional inspection, and dishwashers need rinse-aid plus periodic internal descaling. A whole-house water softener is commonly used in Sparks and Reno households. TMWA consistently delivers water meeting all Nevada NDEP and EPA Safe Drinking Water Act requirements.
Geology & Source: Mixed supply from Truckee River (Lake Tahoe, Sierra Nevada) and Truckee Meadows basin groundwater via the Truckee Meadows Water Authority (TMWA) — the Sierra Nevada Cretaceous Tahoe and Graniteville granodiorite Truckee River source (soft) is modified by Great Basin Basin-and-Range calcareous alluvial basin fill groundwater, producing extreme hard supply at 366 mg/L — reflecting the concentrated Truckee Meadows valley artesian zone.