Water Hardness in 52742
De Witt, Iowa · Clinton County
Dataset updated March 9, 2026Matched to 5 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology
How this ZIP reading is built
This ZIP reading is built from 5 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 52742
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 |
|---|---|---|---|
| Iowa-American Wtr Co-Clinton District IA2326048 | groundwater | 290 PPM Very Hard | |
| De Witt Water Supply IA2330036 | groundwater | 230 PPM Hard | |
| Timber Ridge IA0600600 | surface water | 230 PPM Hard | |
| Meadow Knolls Addition IA5751301 | groundwater | 230 PPM Hard | |
| Cardinal Valley Estates 3Rd Addition IA2330303 | groundwater | 230 PPM 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 De Witt, IA (52742).
Frequently Asked Questions
Is the water hard in De Witt, IA (52742)?
The average water hardness in 52742 is 279 PPM (16.3 GPG), which is classified as very hard.
Do I need a water softener in 52742?
With hardness of 279 PPM, a water softener is recommended for homes in 52742.
Is hard water in 52742 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 52742?
Zip code 52742 in De Witt, Iowa is served by 5 water systems.
Learn More About Your Water
How to Test Water Hardness at Home
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