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

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

Waldorf Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

8.2

neutral = 7.0

Lead

0.008 mg/L

✓ Below action level

TDS

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

Appliance	In Waldorf	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 Waldorf compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Waldorf, Maryland	≈ 120–179 mg/L	10 ppt	🟠 Hard	groundwater
Saint Charles, Maryland	≈ 120–179 mg/L	10.8 ppt	🟠 Hard	reservoir
St. Charles, Maryland	≈ 0–60 mg/L	7.5 ppt	🟢 Soft	reservoir
Bennsville, Maryland	≈ 120–179 mg/L	7.4 ppt	🟠 Hard	reservoir
Accokeek, Maryland	≈ 120–179 mg/L	10.4 ppt	🟠 Hard	groundwater

National Benchmark

How Waldorf compares to the USA average

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

Local geology and source profile

Source: GroundwaterTDS: 458.4 mg/LpH: 8.2

The Waldorf Community Public Water System, operated by Charles County Government Department of Public Works and Utilities, serves Waldorf and surrounding areas in Charles County, Maryland. It relies on 15 groundwater wells tapping the Patapsco and Magothy aquifers, blended with purchased surface water from the Washington Suburban Sanitary Commission (WSSC). WSSC treats raw water from the Patuxent River and Potomac River at its treatment plants before delivery, providing reliable service to approximately 50,000 residents with annual Consumer Confidence Reports confirming compliance with state and federal standards.

The groundwater component is recharged locally within the Coastal Plain physiographic province; the Patapsco and Magothy aquifers are artesian systems embedded in Potomac Group formations of Cretaceous age, featuring permeable quartz sands that yield mineralized water. The WSSC surface water portion originates from the Potomac River Basin watershed, encompassing over 14,000 square miles across Maryland, Virginia, and West Virginia; river sources interact with Piedmont metamorphic rocks upstream, dissolving bicarbonates and sulfates. This geology imparts a hard character to the blended supply through natural leaching of calcium and magnesium from sedimentary layers and fluvial transport.

Hard water in Waldorf leads to scale buildup in pipes, water heaters, dishwashers, and washing machines, reducing efficiency and lifespan while increasing energy costs. Dry skin, soap scum, and spotted dishes are common household effects. Regular deliming of appliances and installing drain screens helps mitigate issues; a water softener is recommended to prevent mineral accumulation and extend plumbing durability. The 2024 Annual Drinking Water Quality Report from Charles County affirms the water meets all EPA and Maryland Department of the Environment requirements; blended sources undergo filtration, disinfection, and corrosion control; fluoride is added for dental health; lead and copper levels comply with action levels based on tap sampling.

Geology & Source: Patapsco and Magothy aquifers - Cretaceous Potomac Group quartz sands, Coastal Plain; blended with Patuxent and Potomac River surface water draining Piedmont schists and gneisses; calcium and magnesium dissolution yields a hard supply

Other Maryland Water Reports

Saint Charles

≈ 120–179 mg/L

🟠 Hard

St. Charles

≈ 0–60 mg/L

🟢 Soft

Bennsville

≈ 120–179 mg/L

🟠 Hard

Accokeek

≈ 120–179 mg/L

🟠 Hard

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Frequently Asked Questions

Is Waldorf's water safe to drink?

Yes. Waldorf'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 Waldorf?

At ≈ 120–179 mg/L (Hard), Waldorf'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 Waldorf compare to the USA average?

The USA national average is 151 mg/L. Waldorf (≈ 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 Waldorf 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.