Fairfax Station Water Hardness & Quality Report (2026)
Water Hardness
6.3 grains per gallon
Source
reservoir
pH Level
7.7
neutral = 7.0
Lead
0.003 mg/L
✓ Below action level
TDS
195.5 mg/L
Est. Daily Cost
$0.29
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 Fairfax Station, your appliances are currently losing 14% efficiency due to mineral buildup.
| Appliance | In Fairfax Station | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6 yrs | 8.5 yrs | -29% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 11.3 yrs | 15 yrs | -25% |
Regional Water Comparison
How Fairfax Station compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Fairfax Station, Virginia | 108.5 mg/L | 5.5 ppt | 🟡 Moderately Hard | reservoir |
| Kings Park West, Virginia | 119.5 mg/L | 6.1 ppt | 🟡 Moderately Hard | reservoir |
| Fairfax, Virginia | 105 mg/L | 5.3 ppt | 🟡 Moderately Hard | reservoir |
| Burke, Virginia | 89 mg/L | 4.5 ppt | 🟡 Moderately Hard | reservoir |
| Oakton, Virginia | 147 mg/L | 7.6 ppt | 🟠 Hard | reservoir |
National Benchmark
How Fairfax Station compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Fairfax Station | 108.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Fairfax Station's Water Unique?
Local geology and source profile
Fairfax Station, Virginia, in Fairfax County — a Fairfax County unincorporated community adjacent to Burke and Clifton in the Washington DC southwestern suburbs — receives its water from Fairfax Water, drawing from Occoquan Reservoir (an impoundment of the Occoquan River) through the northern Virginia distribution.
The moderately hard 108.5 mg/L hardness and TDS of 195.5 mg/L reflect the Fairfax County Occoquan supply's moderate calcareous character — the Precambrian Laurentian Gneiss of the Bull Run Mountains provides insoluble dilution, while Cambrian Chickies Formation quartzite and minor calcareous formations in the upper watershed add modest mineral content (compare Burke VA: 106/192 in Fairfax County comparable; Clifton VA: 110/198 in Fairfax County comparable; Fairfax Station consistent moderate from the same Fairfax County Occoquan Precambrian-Cambrian supply). The Occoquan watershed at Fairfax County — Precambrian Laurentian Gneiss (insoluble — dilutant), Cambrian Chickies Formation (slightly calcareous — primary hardness contributor), and Quaternary Piedmont alluvium (calcareous — TDS contributor).
At 108.5 mg/L with TDS 196, Fairfax Station's water is moderately hard — mild scale buildup in appliances over time. Semi-annual descaling is appropriate. The PFAS level of 5.5 ppt is moderate — a certified drinking water filter provides added protection. Review Fairfax Water's detailed annual water quality report for the latest monitoring data.
Geology & Source: Fairfax Station in Fairfax County draws from Fairfax Water on Occoquan Reservoir (Fairfax County, north Virginia) — the Occoquan watershed at Fairfax County drains Precambrian Laurentian Gneiss (insoluble) and Cambrian Chickies Formation (slightly calcareous) — Virginia Fairfax County Occoquan Reservoir Precambrian-Cambrian supply produces moderately hard water at 108.5 mg/L with TDS 195.5 mg/L.