WH

Water Hardness in Waterman, IL

Illinois · 1 zip codes · 3 matched water systems

241 PPM
14.1 GPG
Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20263 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

Source context

How this city reading is built

This city reading is a weighted rollup across 3 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
3 USGS-backed sources
3 matched systems total for this city; 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 in Waterman

These systems are matched to Waterman, IL. Citywide readings are useful for comparison, but the system serving a specific address may differ from the city average.

3 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.
Dekalb
IL0370100
Hard
240 PPMgroundwater45,000 servedHigh Confidence — USGS Monitoring
Sycamore
IL0370550
Hard
240 PPMgroundwater18,500 servedHigh Confidence — USGS Monitoring
Waterman
IL0370600
Very Hard
300 PPMgroundwater1,506 servedHigh Confidence — USGS Monitoring

Zip Codes in Waterman, IL

What This Means For You

Recommendations are based on the displayed hardness reading. Confirm your tap reading before sizing or buying treatment 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 Waterman, IL.

Submit Your Data

Frequently Asked Questions

How hard is the water in Waterman, IL?

The citywide weighted average water hardness in Waterman, IL is 241 PPM (14.1 GPG), classified as hard. This is based on 3 matched water systems.

Do I need a water softener in Waterman, IL?

With a citywide average hardness of 241 PPM, a water softener is recommended for homes in Waterman. Confirm your tap reading before sizing equipment.

Is hard water in Waterman, IL 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 Waterman, IL?

Waterman, Illinois is served by 3 matched water systems across 1 zip code.

Learn More About Your Water