How does Sudley's water compare to the national average?

The USA national average is 151 mg/L. Sudley (≈ 120–179 mg/L) is 1 mg/L softer than average.

Sudley Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.3

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

482.6 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

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 Sudley, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Sudley	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 Sudley compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Sudley, Virginia	≈ 120–179 mg/L	9.8 ppt	🟠 Hard	reservoir
Bull Run, Virginia	≈ 120–179 mg/L	4.2 ppt	🟠 Hard	reservoir
Manassas Park, Virginia	≈ 120–179 mg/L	17.6 ppt	🟠 Hard	reservoir
Manassas, Virginia	≈ 0–60 mg/L	38.2 ppt	🟢 Soft	reservoir
Centreville, Virginia	≈ 120–179 mg/L	9.3 ppt	🟠 Hard	reservoir

National Benchmark

How Sudley compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Sudley	≈ 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 Sudley's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 482.6 mg/LpH: 8.3

Sudley, Virginia, receives its water from the Prince William Water Company, a utility that draws from two major sources: the Potomac River and the Occoquan Reservoir. These raw water supplies are then directed to regional treatment facilities operated by the Prince William Water Company for purification before being distributed to residents throughout Prince William County, including the Sudley service area.

The Sudley water supply originates within the Piedmont physiographic province. This region is defined by its underlying metamorphic bedrock, which is in turn covered by Quaternary alluvial deposits. As water travels from both the Potomac River and the Occoquan Reservoir through the watershed, it encounters and flows over limestone and other carbonate-rich geological formations. These soluble rocks naturally release minerals like calcium and magnesium into the water, resulting in the moderately hard water characteristic of the area.

Homeowners in Sudley might notice the effects of moderately hard water, such as white scale buildup on dishes and fixtures, and potentially reduced efficiency or lifespan for appliances like water heaters and dishwashers due to scale accumulation. You may also find that soaps and detergents don't lather quite as readily. While the water quality meets all health standards, many residents opt to install water softeners to mitigate these aesthetic issues and prolong the life of their plumbing and appliances. The Prince William Water Company also employs chloramination for disinfection and adheres to all EPA drinking water standards.

Geology & Source: Piedmont metamorphic rocks; limestone and carbonate formations dissolve calcium and magnesium, producing moderate hardness

Other Virginia Water Reports

Bull Run

≈ 120–179 mg/L

🟠 Hard

Manassas Park

≈ 120–179 mg/L

🟠 Hard

Manassas

≈ 0–60 mg/L

🟢 Soft

Centreville

≈ 120–179 mg/L

🟠 Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Sudley's water safe to drink?

Yes. Sudley's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Sudley?

At ≈ 120–179 mg/L (Hard), Sudley's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Sudley compare to the USA average?

The USA national average is 151 mg/L. Sudley (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Sudley is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

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.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

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.

Measured

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.

Modelled

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.

Calculated

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.