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

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

Ferndale Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

reservoir

pH Level

8.4

neutral = 7.0

Lead

0.009 mg/L

✓ Below action level

TDS

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

Appliance	In Ferndale	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 Ferndale compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Ferndale, Maryland	≈ 120–179 mg/L	10.7 ppt	🟠 Hard	reservoir
Linthicum, Maryland	≈ 120–179 mg/L	5.8 ppt	🟠 Hard	groundwater
Glen Burnie, Maryland	≈ 120–179 mg/L	7.5 ppt	🟠 Hard	reservoir
Brooklyn Park, Maryland	≈ 120–179 mg/L	10.6 ppt	🟠 Hard	reservoir
South Gate, Maryland	≈ 120–179 mg/L	9.8 ppt	🟠 Hard	reservoir

National Benchmark

How Ferndale compares to the USA average

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

Local geology and source profile

Source: ReservoirTDS: 519.6 mg/LpH: 8.4

The Ferndale area in Anne Arundel County gets its water from Liberty Reservoir, which is part of the Patapsco River watershed. Unfortunately, there's no specific information available on the Ferndale water utility, treatment plants, or detailed source names. The water supply in Maryland generally comes from the Chesapeake Bay watershed, with Potomac Group aquifers and surface sources influenced by Appalachian Piedmont sedimentary formations.

The regional geology is characterized by limestone and shale from the Triassic and Cretaceous periods, which are rich in calcium and magnesium-bearing minerals like dolomite and calcite. These minerals contribute to a moderately mineralised character in many local water supplies. While specific geology details for Ferndale are unavailable, the typical dissolution of limestone in the area would likely impart hardness to groundwater flows.

If you live in Ferndale, you might notice that your water causes moderate scale buildup in appliances like water heaters and dishwashers, reducing their efficiency over time. To combat this, regular maintenance like monthly vinegar descaling is a good idea. A water softener is also recommended for households that notice spots on glassware or dry skin, as it can help extend appliance life and improve cleaning. Keep in mind that no specific pH, lead, or PFAS data is available for Ferndale, but general Maryland compliance and health guideline exceedances in similar areas have been noted by aggregators.

Geology & Source: Maryland Piedmont - Precambrian Baltimore Gneiss; Cambrian Wissahickon Schist; calcareous Triassic Newark Basin produce hard water

Other Maryland Water Reports

Linthicum

≈ 120–179 mg/L

🟠 Hard

Glen Burnie

≈ 120–179 mg/L

🟠 Hard

Brooklyn Park

≈ 120–179 mg/L

🟠 Hard

South Gate

≈ 120–179 mg/L

🟠 Hard

Report an Issue

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 Ferndale's water safe to drink?

Yes. Ferndale'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 Ferndale?

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

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