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Water Hardness in South Beloit, IL

Illinois · 1 zip codes · 5 matched water systems

300 PPM
17.5 GPG
Very Hard
0Soft60120180300+
Verified — Annual Water Quality Report

City avg (weighted): 297 PPM

Dataset updated March 9, 20265 matched water systems in the city rollupIndividual systems and ZIPs can differ. Methodology

System used for this reading
Rockford
IL2010300
Water source: groundwater
Serves: 147,051
USGS environmental estimate: 317 PPM
Source context

How this city reading is built

This city reading is a weighted rollup across 5 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
3 verified treated-water sources
5 matched systems total for this city; treated-water reports are prioritized when available.
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 South Beloit

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

5 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.
Rockford
IL2010300
Very Hard
300 PPMgroundwater147,051 servedVerified — Annual Water Quality Report
Source water: 317 PPM
North Park Pwd
IL2015500
Very Hard
300 PPMgroundwater35,580 servedVerified — Annual Water Quality Report
Source water: 297 PPM
Loves Park
IL2010150
Very Hard
300 PPMgroundwater23,335 servedVerified — Annual Water Quality Report
Source water: 297 PPM
Il American-South Beloit
IL2010450
Hard
207 PPMgroundwater7,893 servedHigh Confidence — USGS Monitoring
South Bluff Mhp
IL2010460
Very Hard
317 PPMgroundwater507 servedEstimated — County Avg

Zip Codes in South Beloit, IL

What This Means For You

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

Very Hard Water - Treatment Strongly Recommended

Your water is very hard. Without treatment, you can expect significant scale buildup in pipes and appliances, higher energy bills from reduced water heater efficiency, and persistent issues with skin and hair dryness.

Recommended Products

Learn more: Do I Need a Water Softener? | Salt-Based vs Salt-Free | Size Calculator | 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 South Beloit, IL.

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Frequently Asked Questions

How hard is the water in South Beloit, IL?

The citywide weighted average water hardness in South Beloit, IL is 297 PPM (17.3 GPG), classified as very hard. This is based on 5 matched water systems. The gauge highlights Rockford, a verified treated-water system, because individual systems can differ from the citywide average.

Do I need a water softener in South Beloit, IL?

With a citywide average hardness of 297 PPM, a water softener is recommended for homes in South Beloit. Confirm your tap reading before sizing equipment.

Is hard water in South Beloit, 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 South Beloit, IL?

South Beloit, Illinois is served by 5 matched water systems across 1 zip code.

Learn More About Your Water