Manassas Park Water Hardness & Quality Report (2026)
Water Hardness
7.5 grains per gallon
Source
reservoir
pH Level
7.8
neutral = 7.0
Lead
0.004 mg/L
✓ Below action level
TDS
255.1 mg/L
Est. Daily Cost
$0.34
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 Manassas Park, your appliances are currently losing 17% efficiency due to mineral buildup.
| Appliance | In Manassas Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5.4 yrs | 8.5 yrs | -36% |
| Washing Machine | 8.9 yrs | 12 yrs | -26% |
| Water Heater | 10.5 yrs | 15 yrs | -30% |
Regional Water Comparison
How Manassas Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Manassas Park, Virginia | 128 mg/L | 6.6 ppt | 🟠 Hard | reservoir |
| Sudley, Virginia | 187.5 mg/L | 9.8 ppt | 🔴 Very Hard | reservoir |
| Manassas, Virginia | 127.5 mg/L | 6.5 ppt | 🟠 Hard | reservoir |
| Bull Run, Virginia | 84.5 mg/L | 4.2 ppt | 🟡 Moderately Hard | reservoir |
| Buckhall, Virginia | 196 mg/L | 10.2 ppt | 🔴 Very Hard | reservoir |
National Benchmark
How Manassas Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Manassas Park | 128 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Manassas Park's Water Unique?
Local geology and source profile
Manassas Park, Virginia, in the independent City of Manassas Park — a Virginia independent city adjacent to Manassas and Prince William County in north Virginia — receives its municipal water from the Prince William County Service Authority, drawing from the Occoquan Reservoir through the north Virginia water treatment system.
The moderately hard 128 mg/L hardness and TDS of 255.1 mg/L are consistent with the Prince William County Service Authority service zone — harder than the south Fairfax Occoquan communities (Hybla Valley: 93.5 mg/L) due to Manassas Park's proximity to the Triassic Culpeper Basin's most concentrated calcareous exposure (Manassas sits directly on the Culpeper Basin). The Occoquan Reservoir drainage at Prince William County crosses the Virginia Piedmont — Triassic Culpeper Basin (calcareous arkosic sandstone — primary hardness contributor at the Manassas area), Precambrian Bull Run Granite (insoluble), and Jurassic Orange Diorite (minor calcareous).
At 128 mg/L, Manassas Park'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 6.6 ppt warrants a certified drinking water filter — the Prince William County Quantico-Manassas corridor (Marine Corps Base Quantico — AFFF, in the adjacent Quantico Creek-Occoquan watershed) contributes to Manassas Park's moderately elevated readings.
Geology & Source: Manassas Park in City of Manassas Park draws from Prince William County Service Authority on the Occoquan Reservoir (Prince William County, north Virginia) — the Occoquan drains the Virginia Piedmont (Triassic Culpeper Basin calcareous, Precambrian Bull Run Granite) — Virginia Manassas Park Occoquan Reservoir Piedmont calcareous watershed produces moderately hard water at 128 mg/L with TDS 255.1 mg/L.