Water Hardness in 65401
Rolla, Missouri · Phelps County
Dataset updated March 9, 2026Matched to 6 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 6 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 65401
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 |
|---|---|---|---|
| Rolla Pws MO3010700 | groundwater | 305 PPM Very Hard | |
| Phelps County Pwsd 2 South MO3024467 | groundwater | 305 PPM Very Hard | |
| Phelps County Pwsd 2 North MO3024466 | groundwater | 305 PPM Very Hard | |
| Lakeside Community Inc MO3031118 | groundwater | 305 PPM Very Hard | |
| Stately Mansion Mobile Villa MO3048123 | groundwater | 305 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 Rolla, MO (65401).
Frequently Asked Questions
Is the water hard in Rolla, MO (65401)?
The average water hardness in 65401 is 305 PPM (17.8 GPG), which is classified as very hard.
Do I need a water softener in 65401?
With hardness of 305 PPM, a water softener is recommended for homes in 65401.
Is hard water in 65401 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 65401?
Zip code 65401 in Rolla, Missouri is served by 6 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
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