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Water Hardness in 50469

Rockwell, Iowa · Cerro Gordo County

297 PPM
17.4 GPG
Very Hard
0Soft60120180300+
High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 2 water systemsTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 2 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.

Source basis
2 USGS-backed sources
2 matched systems total for this ZIP; USGS monitoring is used where treated-water reports are unavailable.
Water source profile
Primarily groundwater
Groundwater commonly picks up calcium and magnesium after contact with rock and soil. This profile is weighted by known population served across matched systems.
Data recency
March 9, 2026
Dataset rebuilt March 9, 2026; individual utility reporting years can vary.

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 50469

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.

2 water systems
PWSID is the public water system identifier. Data Source shows whether the hardness value comes from a treated-water report, USGS monitoring, or a local estimate; source year is shown when available.
Mason City Water Department
IA1750048
Very Hard
297 PPMgroundwater27,338 servedHigh Confidence - USGS Monitoring
Rockwell Water Supply
IA1773097
Very Hard
298 PPMgroundwater1,071 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

504772975047529850433297504012975047929750468304504282965060520050458297506533045045729750482301

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.

MethodologyData sourcesHow 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 Rockwell, IA (50469).

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Frequently Asked Questions

Is the water hard in Rockwell, IA (50469)?

The average water hardness in 50469 is 297 PPM (17.4 GPG), which is classified as very hard.

Do I need a water softener in 50469?

With hardness of 297 PPM, a water softener is recommended for homes in 50469.

Is hard water in 50469 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 50469?

Zip code 50469 in Rockwell, Iowa is served by 2 water systems.

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