Water Hardness in Milwaukee, WI
Wisconsin · 20 zip codes · 29 matched water systems
City avg (weighted): 140 PPM
Dataset updated March 9, 202629 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology
How this city reading is built
This city reading is a weighted rollup across 29 matched water systems and 20 ZIP codes. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.
Hardness is a mineral-content reading, not a drinking-water safety rating. Use it for scale, appliance, and softener decisions; check your utility report or test your tap before sizing treatment equipment. See how we calculate local readings.
Water Systems in Milwaukee
These systems are matched to Milwaukee, WI. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
Milwaukee Waterworks WI2410100 | surface water | 140 PPM Moderately HardUSGS estimate: 247 PPM | |
West Allis Waterworks WI2410595 | surface water | 140 PPM Moderately HardUSGS estimate: 247 PPM | |
Wauwatosa Waterworks WI2410596 | surface water | 140 PPM Moderately HardUSGS estimate: 247 PPM | |
North Shore Water Commission WI2413515 | surface water | 140 PPM Moderately HardUSGS estimate: 281 PPM | |
Oak Creek Waterworks WI2410172 | surface water | 140 PPM Moderately HardUSGS estimate: 247 PPM |
Zip Codes in Milwaukee, WI
What This Means For You
Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.
Moderately Hard Water
Your water is moderately hard. You're likely seeing scale buildup on fixtures, spotty dishes, and may notice dry skin or hair. A water softener or conditioner can help.
Recommended Products
Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | How to Test Your Water
Know your water hardness?
If you've tested your water or have your utility's CCR report, share your reading to help us improve accuracy for Milwaukee, WI.
Frequently Asked Questions
How hard is the water in Milwaukee, WI?
The citywide weighted average water hardness in Milwaukee, WI is 140 PPM (8.2 GPG), classified as moderately hard. This is based on 29 matched water systems.
Do I need a water softener in Milwaukee, WI?
With a citywide average hardness of 140 PPM, a water softener is worth considering for homes in Milwaukee. Confirm your tap reading before sizing equipment.
Is hard water in Milwaukee, WI safe to drink?
Water hardness itself is a mineral-content reading, not a drinking-water safety rating. Calcium and magnesium are naturally occurring minerals, but you should check your utility's Consumer Confidence Report for contaminant and compliance information.
How many water systems serve Milwaukee, WI?
Milwaukee, Wisconsin is served by 29 matched water systems across 20 zip codes.
Learn More About Your Water
Do You Need a Water Softener? (Based on Your Water Hardness)
A data-driven guide to help you decide if a water softener is worth the investment based on your actual water hardness level.
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Salt-based softeners remove hardness minerals. Salt-free conditioners prevent scale but don't soften. Here's how to choose based on your water hardness level.
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We tested KDF, Vitamin C, and carbon shower filters for hard water. Here are the filters that actually reduce mineral buildup on hair and skin.
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