How does Brown Deer's water compare to the national average?

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

Brown Deer 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

0.007 mg/L

✓ Below action level

TDS

662.4 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 Brown Deer, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Brown Deer	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 Brown Deer compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Brown Deer, Wisconsin	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Glendale, Wisconsin	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Whitefish Bay, Wisconsin	≈ 120–179 mg/L	3.1 ppt	🟠 Hard	groundwater
Mequon, Wisconsin	≈ 120–179 mg/L	0 ppt	🟠 Hard	reservoir
Shorewood, Wisconsin	≈ 0–60 mg/L	0 ppt	🟢 Soft	reservoir

National Benchmark

How Brown Deer compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Brown Deer	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

Bring Scarsdale-quality water to your Brown Deer home

Shop water softeners on Amazon.com →

Shop Now

What Makes Brown Deer's Water Unique?

Local geology and source profile

Source: ReservoirTDS: 662.4 mg/LpH: 8.3

Brown Deer Waterworks is the municipal water utility for the village of Brown Deer, Wisconsin, serving about 13,000 residents. As a consecutive system, Brown Deer purchases all its finished water from Milwaukee Water Works. The supply originates as surface water drawn from Lake Michigan, which is then treated at Milwaukee's conventional facilities. Treatment processes include disinfection with chloramines and ozone. For inquiries, you can reach Brown Deer Waterworks at 414-371-3000 or visit their office at 4800 West Green Brook Drive, Brown Deer, WI 53223.

The Lake Michigan watershed, influenced by Pleistocene glacial activity, covers a vast area. Beneath the lakebed and along the coasts lie Paleozoic limestone and dolomite formations, including the Niagaran Series. These soluble carbonate rocks are responsible for dissolving minerals into the surface water, creating a hard water supply with naturally high dissolved solids. This geological characteristic is typical for the Great Lakes region.

This hard water supply can lead to moderate scale buildup in household systems, primarily affecting appliances like water heaters, dishwashers, and washing machines, as well as fixtures such as faucets and showerheads. Pipes and boilers might need more frequent descaling to maintain their efficiency. Homeowners might consider using vinegar rinses for appliances and installing a water softener to extend equipment life and improve soap's lathering ability. While water quality meets all federal and state standards, the utility reports good overall quality with a score around 80/100.

Geology & Source: Paleozoic limestone and dolomite; carbonate-rich sedimentary rocks contribute to hard water

Other Wisconsin Water Reports

Glendale

≈ 120–179 mg/L

🟠 Hard

Whitefish Bay

≈ 120–179 mg/L

🟠 Hard

Mequon

≈ 120–179 mg/L

🟠 Hard

Shorewood

≈ 0–60 mg/L

🟢 Soft

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 Brown Deer's water safe to drink?

Yes. Brown Deer'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 Brown Deer?

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

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