Water Hardness in 55357
Loretto, Minnesota · Hennepin County
Dataset updated March 9, 2026Matched to 20 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 20 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 55357
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 |
|---|---|---|---|
| Minneapolis MN1270024 | surface water | 256 PPM Very HardUSGS estimate: 182 PPM | |
| Bloomington MN1270001 | surface water | 256 PPM Very HardUSGS estimate: 345 PPM | |
| Brooklyn Park MN1270005 | groundwater | 256 PPM Very HardUSGS estimate: 438 PPM | |
| Plymouth MN1270044 | groundwater | 256 PPM Very HardUSGS estimate: 366 PPM | |
| Maple Grove MN1270020 | groundwater | 256 PPM Very HardUSGS estimate: 235 PPM |
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 Loretto, MN (55357).
Frequently Asked Questions
Is the water hard in Loretto, MN (55357)?
The average water hardness in 55357 is 256 PPM (15 GPG), which is classified as very hard.
Do I need a water softener in 55357?
With hardness of 256 PPM, a water softener is recommended for homes in 55357.
Is hard water in 55357 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 55357?
Zip code 55357 in Loretto, Minnesota is served by 20 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
Compare free lookups, soap tests, test strips, liquid drop kits, and lab tests for measuring water hardness.
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