Leesburg Water Hardness & Quality Report (2026)
Water Hardness
8.3 grains per gallon
Source
reservoir
pH Level
7.9
neutral = 7.0
Lead
0.005 mg/L
✓ Below action level
TDS
302.2 mg/L
Est. Daily Cost
$0.38
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 Leesburg, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Leesburg | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 4.9 yrs | 8.5 yrs | -42% |
| Washing Machine | 8.3 yrs | 12 yrs | -31% |
| Water Heater | 9.9 yrs | 15 yrs | -34% |
Regional Water Comparison
How Leesburg compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Leesburg, Virginia | 142 mg/L | 7.3 ppt | 🟠 Hard | reservoir |
| Ashburn, Virginia | 93 mg/L | 4.7 ppt | 🟡 Moderately Hard | reservoir |
| Broadlands, Virginia | 171.5 mg/L | 8.9 ppt | 🟠 Hard | reservoir |
| Sterling, Virginia | 158.5 mg/L | 8.2 ppt | 🟠 Hard | reservoir |
| South Riding, Virginia | 117 mg/L | 6 ppt | 🟡 Moderately Hard | reservoir |
National Benchmark
How Leesburg compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Leesburg | 142 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Leesburg's Water Unique?
Local geology and source profile
Leesburg, Virginia, the Loudoun County seat in Northern Virginia — the 'Gateway to Loudoun County,' one of the wealthiest counties in the United States, a rapidly growing Northern Virginia community at the edge of the DC suburb corridor and Loudoun County's renowned vineyard and brewery destination (the 'DC Wine Country') — draws its municipal water supply from the Potomac River and Goose Creek watershed via the Town of Leesburg Water Division (Leesburg Water Pollution Control Facility). Water hardness in Leesburg measures 142 mg/L — classified as moderately hard.
Leesburg's moderate hardness reflects the Loudoun County Northern Virginia Piedmont watershed. The Goose Creek watershed above Leesburg drains: the Blue Ridge Front (Catoctin Formation metavolcanic greenstone — Proterozoic metabasalt of the Blue Ridge, calcium-moderate mafic rock); the Triassic Bull Run Basin (Triassic Manassas Sandstone and calcareous red bed formations of the Culpeper Basin — calcareous contribution from the Triassic basin margin in eastern Loudoun County); and the Loudoun County Piedmont (Proterozoic basement gneiss of the northern Virginia Piedmont — calcium-poor). The blended calcareous Triassic basin and mafic Blue Ridge recharge produces the moderate 142 mg/L at Leesburg.
At 142 mg/L, Leesburg residents encounter moderate scale accumulation. Faucet aerators and showerheads develop deposits after several months — monthly cleaning with citric acid solution is practical maintenance. Town of Leesburg Water Division consistently delivers water meeting all Virginia DEQ and EPA Safe Drinking Water Act requirements.
Geology & Source: River supply from the Potomac River and the Goose Creek–Dulles area watershed via the Town of Leesburg Water Division — the Loudoun County Northern Virginia Piedmont (Blue Ridge Basement granite and Catoctin Formation metavolcanic greenstone + Triassic Bull Run Formation calcareous terrain); moderately hard supply at 142 mg/L in Loudoun County.