Where does the water in 61537 come from?

Water for zip code 61537 in Henry, Illinois is provided by 1 water system. Contact your local utility for specific source information, or check our detailed page for your area.

Water Hardness in 61537

Henry, Illinois · Marshall County

600 PPM

35.1 GPG

Very Hard

0Soft60120180300+

High Confidence - USGS Monitoring

Dataset updated March 9, 2026Matched to 1 water systemTap readings can vary by utility zone, treatment, and plumbing. Methodology

Source context

How this ZIP reading is built

This ZIP reading is built from 1 matched water system. 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 USGS-backed source

1 matched system 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 61537

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.

1 water system

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
Henry IL1230050	groundwater	600 PPM Very Hard	2,230	High Confidence - USGS Monitoring

Henry

IL1230050

Very Hard

600 PPMgroundwater2,230 servedHigh Confidence - USGS Monitoring

Nearby Zip Codes

61560148 61565600 61540214 61424339 61368339 61421339 61327214 61479300 61426300 61315148 61335214 61375148

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 Henry, IL (61537).

Submit Your Data

Frequently Asked Questions

Is the water hard in Henry, IL (61537)?

The average water hardness in 61537 is 600 PPM (35.1 GPG), which is classified as very hard.

Do I need a water softener in 61537?

With hardness of 600 PPM, a water softener is recommended for homes in 61537.

Is hard water in 61537 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 61537?

Zip code 61537 in Henry, Illinois is served by 1 water system.