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

The USA national average is 151 mg/L. Lansdowne (101 mg/L) is 50 mg/L softer than average.

Lansdowne Water Hardness & Quality Report (2026)

Water Hardness

101mg/L

Moderately Hard

5.9 grains per gallon

Source

reservoir

pH Level

8.1

neutral = 7.0

Lead

0.002 mg/L

✓ Below action level

TDS

308 mg/L

Est. Daily Cost

$0.27

energy & soap waste

Source: See methodology section below · Updated 2026

101mg/L as CaCO₃Moderately Hard

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 Lansdowne, your appliances are currently losing 13% efficiency due to mineral buildup.

Appliance	In Lansdowne	Soft Water City	Efficiency Loss
Kettle	7.4 yrs	8.5 yrs	-13%
Washing Machine	10.4 yrs	12 yrs	-13%
Water Heater	13.1 yrs	15 yrs	-13%

Regional Water Comparison

How Lansdowne compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Lansdowne, Pennsylvania	101 mg/L	5.1 ppt	🟡 Moderately Hard	reservoir
Yeadon, Pennsylvania	≈ 120–179 mg/L	7.2 ppt	🟠 Hard	reservoir
Drexel Hill, Pennsylvania	≈ 120–179 mg/L	8.2 ppt	🟠 Hard	reservoir
Darby, Pennsylvania	≈ 120–179 mg/L	7.8 ppt	🟠 Hard	reservoir
Cobbs Creek, Pennsylvania	≈ 120–179 mg/L	7.2 ppt	🟠 Hard	reservoir

National Benchmark

How Lansdowne compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Lansdowne	101 mg/L	🟡 Low
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Lansdowne's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 308 mg/LpH: 8.1

AQUA PA MAIN SYSTEM, operated by American Water, supplies water to roughly 822,600 people across several counties. Their supply originates from the Delaware River watershed, a significant surface water source for southeastern Pennsylvania. Key monitoring points, like Cobbs Creek at East Lansdowne, are located within Delaware County. The utility manages multiple treatment plants and extensive distribution networks to serve Lansdowne and surrounding communities. Water hardness can fluctuate seasonally, influenced by precipitation levels and snowmelt, according to American Water's operational notes.

The water's journey begins in the Delaware River watershed, which spans the Piedmont and Ridge-and-Valley provinces. Underlying the region are ancient Precambrian metamorphic rocks such as schists, gneisses, and quartzites, alongside Paleozoic sedimentary layers containing limestone and shale. These mineral-rich geological features, combined with sediments left by glacial activity, contribute dissolved minerals that affect the water's chemistry. This geological makeup is typical for the mid-Atlantic area.

Homeowners may notice mineral buildup on fixtures or dishes, a common sign of dissolved minerals in tap water. If you're experiencing these issues, consider testing your water or contacting AQUA PA MAIN SYSTEM directly for a localized report. American Water also offers online resources detailing hardness classifications and treatment options for their service areas. Understanding your water's specific composition, including mineral content and pH, is key to managing potential impacts on appliances and plumbing.

Geology & Source: Precambrian metamorphic rocks and Paleozoic sedimentary formations including limestone; dissolution of carbonate minerals and glacial deposits influence hardness

Other Pennsylvania Water Reports

Yeadon

≈ 120–179 mg/L

🟠 Hard

Drexel Hill

≈ 120–179 mg/L

🟠 Hard

Darby

≈ 120–179 mg/L

🟠 Hard

Cobbs Creek

≈ 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 Lansdowne's water safe to drink?

Yes. Lansdowne's water meets all federal safety standards. The hardness is 101 mg/L (Moderately Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Lansdowne?

Lansdowne's water is moderately hard at 101 mg/L. A water softener is generally not necessary, though a carbon filter can improve taste and remove any remaining chlorine.

How does Lansdowne compare to the USA average?

The USA national average is 151 mg/L. Lansdowne (101 mg/L) is 50 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 Lansdowne 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.