Water Hardness in Rochester, MN
Minnesota · 4 zip codes · 8 matched water systems
City avg (weighted): 280 PPM
Dataset updated March 9, 20268 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 8 matched water systems and 4 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 Rochester
These systems are matched to Rochester, MN. 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 |
|---|---|---|---|
Rochester MN1550010 | groundwater | 280 PPM Very HardUSGS estimate: 324 PPM | |
Chester Heights MN1550020 | groundwater | 280 PPM Very HardUSGS estimate: 324 PPM | |
Zumbro Ridge Estates MN1550003 | groundwater | 280 PPM Very HardUSGS estimate: 324 PPM | |
Hallmark Terrace Mobile Home Park MN1550029 | groundwater | 280 PPM Very HardUSGS estimate: 324 PPM | |
Sandy Slopes Community MN1550027 | groundwater | 280 PPM Very HardUSGS estimate: 324 PPM |
Zip Codes in Rochester, MN
What This Means For You
Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment equipment.
Very Hard Water - Treatment Strongly Recommended
Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.
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 Rochester, MN.
Frequently Asked Questions
How hard is the water in Rochester, MN?
The citywide weighted average water hardness in Rochester, MN is 280 PPM (16.4 GPG), classified as very hard. This is based on 8 matched water systems.
Do I need a water softener in Rochester, MN?
With a citywide average hardness of 280 PPM, a water softener is recommended for homes in Rochester. Confirm your tap reading before sizing equipment.
Is hard water in Rochester, MN 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 Rochester, MN?
Rochester, Minnesota is served by 8 matched water systems across 4 zip codes.
Learn More About Your Water
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