Water Hardness in 53092
Mequon, Wisconsin · Ozaukee County
Dataset updated March 9, 2026Matched to 25 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 25 matched water systems. When more than one system is matched, the displayed value is weighted toward larger known service populations when that data is available.
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 Serving 53092
These are the systems matched to this ZIP code. The displayed ZIP value is weighted toward larger known service populations when population data is available.
| Water System | Source | Hardness | Pop. Served |
|---|---|---|---|
| Port Washington Waterworks WI2460054 | surface water | 393 PPM Very Hard | |
| Grafton Waterworks WI2460111 | groundwater | 281 PPM Very Hard | |
| Cedarburg L & W Commission WI2460108 | groundwater | 281 PPM Very Hard | |
| Mequon Water Utility WI2460112 | surface water | 281 PPM Very Hard | |
| Concordia University WI2460118 | groundwater | 281 PPM Very Hard |
Nearby Zip Codes
What This Means For You
Use this ZIP reading as a local planning estimate, not a final treatment specification. Hardness can vary by utility zone, seasonal blend, private well, and building plumbing. Confirm your tap reading with a utility report or home hardness test before sizing equipment.
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 Mequon, WI (53092).
Frequently Asked Questions
Is the water hard in Mequon, WI (53092)?
The average water hardness in 53092 is 308 PPM (18 GPG), which is classified as very hard.
Do I need a water softener in 53092?
With hardness of 308 PPM, a water softener is recommended for homes in 53092.
Is hard water in 53092 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 53092?
Zip code 53092 in Mequon, Wisconsin is served by 25 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
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