Where does the water in 51536 come from?

Water for zip code 51536 in Hancock, Iowa is provided by 2 water systems. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 51536

Hancock, Iowa · Pottawattamie County

202 PPM

11.8 GPG

Hard

0Soft60120180300+

Verified - Annual Water Quality Report

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

1 verified treated-water source

2 matched systems total for this ZIP; treated-water reports are prioritized when available.

Water source profile

Primarily surface water

Surface-water hardness can shift with reservoirs, runoff, season, and treatment. 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 51536

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.

Water System	Source	Hardness	Pop. Served	Data Source
Council Bluffs Water Works IA7820080	surface water	200 PPM Hard USGS estimate: 867 PPM	64,447	Verified - Annual Water Quality Report
Hancock Water Supply IA7833025	groundwater	720 PPM Very Hard	200	High Confidence - USGS Monitoring

Council Bluffs Water Works

IA7820080

Hard

200 PPMsurface water64,447 servedVerified - Annual Water Quality Report

Source water: 867 PPM

Hancock Water Supply

IA7833025

Very Hard

720 PPMgroundwater200 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

51560204 51521243 51553201 51577206 51525203 51570305 51549201 51548200 51544460 51559202 51552140 51575203

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.

Methodology Data sources 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 Hancock, IA (51536).

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Frequently Asked Questions

Is the water hard in Hancock, IA (51536)?

The average water hardness in 51536 is 202 PPM (11.8 GPG), which is classified as hard.

Do I need a water softener in 51536?

With hardness of 202 PPM, a water softener is recommended for homes in 51536.

Is hard water in 51536 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 51536?

Zip code 51536 in Hancock, Iowa is served by 2 water systems.