Kings Park West Water Hardness & Quality Report (2026)
Water Hardness
7 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
227.7 mg/L
Est. Daily Cost
$0.32
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 Kings Park West, your appliances are currently losing 16% efficiency due to mineral buildup.
| Appliance | In Kings Park West | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.7 yrs | 8.5 yrs | -33% |
| Washing Machine | 9.2 yrs | 12 yrs | -23% |
| Water Heater | 10.8 yrs | 15 yrs | -28% |
Regional Water Comparison
How Kings Park West compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Kings Park West, Virginia | 119.5 mg/L | 6.1 ppt | 🟡 Moderately Hard | reservoir |
| Burke, Virginia | 89 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Fairfax, Virginia | 105 mg/L | 5.3 ppt | 🟡 Moderately Hard | reservoir |
| Oakton, Virginia | 147 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
| West Springfield, Virginia | 168.5 mg/L | 8.7 ppt | 🟠 Hard | reservoir |
National Benchmark
How Kings Park West compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Kings Park West | 119.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Kings Park West's Water Unique?
Local geology and source profile
Kings Park West, Virginia, in Fairfax County — a Fairfax County community adjacent to Burke and Fairfax in the south Fairfax County Washington DC suburbs — receives its water from Fairfax Water, drawing from Occoquan Reservoir or the Potomac River (Fairfax County) through the Northern Virginia distribution.
The moderately hard 119.5 mg/L hardness and TDS of 227.7 mg/L reflect the north Virginia Fairfax County Occoquan-Potomac supply's moderate calcareous character — reflecting the Piedmont calcareous metasediment geology of the Virginia Fairfax County watershed, consistent with other Northern Virginia communities on the Fairfax Water system (compare Clarksburg MD at 141 mg/L on the comparable Maryland WSSC supply). The Occoquan-Potomac watershed at Fairfax County — Precambrian Occoquan Granite (insoluble — dilutant), Cambrian calcareous metasediments (calcareous — primary hardness contributor), and Quaternary Piedmont alluvium (slightly calcareous — TDS contributor).
At 119.5 mg/L, Kings Park West's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and faucet aerators need periodic cleaning. Quarterly descaling is appropriate. The PFAS level of 6.1 ppt warrants a certified drinking water filter — Quantico Marine Corps Base (Prince William County — AFFF, regional) and the Fairfax County Northern Virginia industrial corridor contribute to Kings Park West's elevated readings.
Geology & Source: Kings Park West in Fairfax County draws from the Fairfax Water on Occoquan Reservoir or the Potomac River (Fairfax County, north Virginia) — the Occoquan-Potomac watershed drains the Virginia Piedmont (Precambrian Occoquan Granite — insoluble) and Cambrian calcareous metasediments — Virginia Fairfax County Occoquan-Potomac Piedmont Precambrian-Cambrian calcareous supply produces moderately hard water at 119.5 mg/L with TDS 227.7 mg/L.