Manassas Park Water Hardness & Quality Report (2026)
Water Hardness
~120–179 mg/L
Hardestimated · not lab-verified
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
$0.40
energy & soap waste
Source: See methodology section below · 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 20% efficiency due to mineral buildup.
| Appliance | In Manassas Park | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 6.8 yrs | 8.5 yrs | -20% |
| Washing Machine | 9.6 yrs | 12 yrs | -20% |
| Water Heater | 12 yrs | 15 yrs | -20% |
Regional Water Comparison
How Manassas Park compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Manassas Park, Virginia | ≈ 120–179 mg/L | 17.6 ppt | 🟠 Hard | reservoir |
| Sudley, Virginia | ≈ 120–179 mg/L | 9.8 ppt | 🟠 Hard | reservoir |
| Manassas, Virginia | ≈ 0–60 mg/L | 38.2 ppt | 🟢 Soft | reservoir |
| Bull Run, Virginia | ≈ 120–179 mg/L | 4.2 ppt | 🟠 Hard | reservoir |
| Buckhall, Virginia | ≈ 120–179 mg/L | 10.2 ppt | 🟠 Hard | reservoir |
National Benchmark
How Manassas Park compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Manassas Park | ≈ 120–179 mg/L | 🟠 Moderate |
| USA National Avg | 151 mg/L | 🟠 Moderate |
| Scarsdale Top Rated | 0.02 mg/L | 🟢 None |
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What Makes Manassas Park's Water Unique?
Local geology and source profile
Manassas Park, Virginia, gets its water from the City of Manassas utility. This utility draws from surface water sources in the upper Occoquan River basin, using conventional filtration treatment. While specific treatment plant names for Manassas Park aren't listed, the system serves the city and adjacent communities within Prince William County. The watershed spans the Piedmont physiographic province, a landscape shaped by forested uplands and urban development. Water quality is generally rated well, with a score of 80/100, and disinfection involves chloramines and hypochlorite.
The underlying geology of the Piedmont region features ancient metamorphic gneisses and granitic intrusions from the Precambrian era. These crystalline rocks are interspersed with Triassic basin sediments, including the Bull Run Formation. As water percolates through fractured bedrock and soil, it naturally leaches divalent cations like calcium and magnesium. This process results in a moderately mineralized supply, typical of areas with these rock types, distinguishing it from softer water found in limestone-rich terrains.
Homeowners might notice scale buildup on fixtures, which can reduce the efficiency of appliances like dishwashers, washing machines, and water heaters over time. Faucet aerators and showerheads are particularly susceptible to clogs, leading to reduced water flow. For those experiencing these issues, regular descaling with vinegar or the installation of a whole-house water softener is often recommended. Keep an eye out for spotting on glassware or a film on your skin after bathing, which can also indicate moderately hard water.
Geology & Source: Piedmont metamorphic and igneous rocks; gneiss and schist; Triassic sedimentary formations; moderate hardness from leached calcium and magnesium
Other Virginia Water Reports
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Frequently Asked Questions
Is Manassas Park's water safe to drink?
Do I need a water softener in Manassas Park?
How does Manassas Park compare to the USA average?
Data Sources & Methodology
Water quality data for Manassas Park is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.
Water Hardness
Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.
pH
Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.
TDS — Total Dissolved Solids
Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.
PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances
EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.
Lead
Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.
Appliance Lifespan
Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.