Hybla Valley Water Hardness & Quality Report (2026)
Water Hardness
5.5 grains per gallon
Source
reservoir
pH Level
7.5
neutral = 7.0
Lead
0.002 mg/L
✓ Below action level
TDS
154.4 mg/L
Est. Daily Cost
$0.25
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 Hybla Valley, your appliances are currently losing 12% efficiency due to mineral buildup.
| Appliance | In Hybla Valley | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.5 yrs | 8.5 yrs | -24% |
| Washing Machine | 10.1 yrs | 12 yrs | -16% |
| Water Heater | 11.9 yrs | 15 yrs | -21% |
Regional Water Comparison
How Hybla Valley compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Hybla Valley, Virginia | 93.5 mg/L | 4.7 ppt | 🟡 Moderately Hard | reservoir |
| Groveton, Virginia | 195 mg/L | 10.1 ppt | 🔴 Very Hard | reservoir |
| Fort Hunt, Virginia | 145 mg/L | 7.5 ppt | 🟠 Hard | reservoir |
| Mount Vernon, Virginia | 104.5 mg/L | 5.3 ppt | 🟡 Moderately Hard | reservoir |
| Rose Hill, Virginia | 182 mg/L | 9.5 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Hybla Valley compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Hybla Valley | 93.5 mg/L | 🟡 Low |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Hybla Valley's Water Unique?
Local geology and source profile
Hybla Valley, Virginia, in Fairfax County — an unincorporated Fairfax County community adjacent to Groveton and Mount Vernon in south Fairfax County — receives its municipal water from Fairfax Water, drawing from the Occoquan Reservoir and Potomac River intakes (Fairfax County) through the Fairfax Water treatment and distribution system.
The moderately soft 93.5 mg/L hardness and TDS of 154.4 mg/L are consistent with other Fairfax Water Occoquan-served communities in south Fairfax County — somewhat softer than the north Fairfax Potomac River-dominant supply (Vienna: 85.5 mg/L), reflecting the Occoquan watershed's mixed Piedmont calcareous input. The Occoquan Reservoir drains the Virginia Piedmont — Precambrian Bull Run Granite (insoluble), Triassic Culpeper Basin (calcareous redbed arkose — moderate hardness contributor), and Cambrian Cheshire Quartzite (insoluble). The minor Culpeper calcareous input produces the moderately soft south Fairfax supply.
At 93.5 mg/L, Hybla Valley's water is moderately soft — light scale forms slowly in appliances, dishwashers remain efficient, and bathroom fixtures need occasional cleaning. Semi-annual descaling is appropriate. The PFAS level of 4.7 ppt warrants a certified drinking water filter — the Fairfax County Occoquan-south Fairfax corridor has limited direct AFFF sources, and the Occoquan watershed PFAS background is generally lower than the Potomac-fed communities.
Geology & Source: Hybla Valley in Fairfax County draws from Fairfax Water on the Occoquan Reservoir (Fairfax County, north Virginia) — the Occoquan drains the Virginia Piedmont (Precambrian Bull Run Granite, Triassic Culpeper Basin calcareous) — Virginia Fairfax County Occoquan Reservoir Piedmont watershed produces moderately soft water at 93.5 mg/L with TDS 154.4 mg/L in this Fairfax County Virginia community.