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

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

Seabrook Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

7.9

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

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

Appliance	In Seabrook	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 Seabrook compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Seabrook, Maryland	≈ 120–179 mg/L	7.4 ppt	🟠 Hard	reservoir
Lanham-Seabrook, Maryland	≈ 120–179 mg/L	7 ppt	🟠 Hard	reservoir
Lanham, Maryland	≈ 120–179 mg/L	4.7 ppt	🟠 Hard	reservoir
New Carrollton, Maryland	≈ 120–179 mg/L	6.6 ppt	🟠 Hard	reservoir
Glenn Dale, Maryland	≈ 120–179 mg/L	7.7 ppt	🟠 Hard	reservoir

National Benchmark

How Seabrook compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 286 mg/LpH: 7.9

The WSSC Water utility serves Seabrook, Maryland, drawing from the Patuxent River reservoir system in Prince George's County. Water is sourced from the Potomac River supply zone and treated at facilities serving the broader Washington, D.C. metropolitan area, including communities like Seabrook and Lanham-Seabrook. The Patuxent River watershed features Ordovician Sykesville Formation and Precambrian Glenarm Series rocks, which are calcareous and crystalline, releasing dissolved minerals like calcium and magnesium into the water.

The Maryland Piedmont region's geological formations contribute to the water's hard character, consistent with other Piedmont-sourced waters in Prince George's County. The Sykesville Formation and Glenarm Series rocks are rich in carbonates, which dissolve into the water and increase its hardness. This hard water is typical of the Piedmont region and is a result of the area's unique geology.

For homeowners in Seabrook, the hard water can cause significant problems, including limescale buildup on appliances like kettles and washing machines. To mitigate this, regular descaling is necessary, and a water softener or descaler is recommended to extend appliance life and cut energy bills. The water's neutral pH of around 7.9 is within safe ranges, and it meets all federal safety standards, with lead and copper levels below action levels, according to data from the USGS Water Quality Portal.

Geology & Source: Maryland Piedmont - Ordovician Sykesville Formation; Precambrian Glenarm Series with calcareous-crystalline rocks produce hard water

Other Maryland Water Reports

Lanham-Seabrook

≈ 120–179 mg/L

🟠 Hard

Lanham

≈ 120–179 mg/L

🟠 Hard

New Carrollton

≈ 120–179 mg/L

🟠 Hard

Glenn Dale

≈ 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 Seabrook's water safe to drink?

Yes. Seabrook'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 Seabrook?

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

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