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Water Hardness in Poplar Grove, IL

Illinois · 1 zip codes · 6 matched water systems

371 PPM
21.7 GPG
Very Hard
0Soft60120180300+
High Confidence — USGS Monitoring

Dataset updated March 9, 20266 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 6 matched water systems and 1 ZIP code. Citywide readings are useful for comparison, but individual utility zones and ZIPs can differ.

Source basis
6 USGS-backed sources
6 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 Poplar Grove

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

6 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.
Belvidere
IL0070050
Very Hard
376 PPMgroundwater25,070 servedHigh Confidence — USGS Monitoring
Poplar Grove
IL0070150
Very Hard
348 PPMgroundwater2,372 servedHigh Confidence — USGS Monitoring
Poplar Grove South
IL0070300
Very Hard
348 PPMgroundwater1,877 servedHigh Confidence — USGS Monitoring
Poplar Grove West-Countryside
IL0070350
Very Hard
348 PPMgroundwater790 servedHigh Confidence — USGS Monitoring
Oak Lawn Mhp
IL0075275
Very Hard
348 PPMgroundwater450 servedHigh Confidence — USGS Monitoring
Showing the first 5 systems. Expand to review all matched systems.

Zip Codes in Poplar Grove, 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 Poplar Grove, IL.

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Frequently Asked Questions

How hard is the water in Poplar Grove, IL?

The citywide weighted average water hardness in Poplar Grove, IL is 371 PPM (21.7 GPG), classified as very hard. This is based on 6 matched water systems.

Do I need a water softener in Poplar Grove, IL?

With a citywide average hardness of 371 PPM, a water softener is recommended for homes in Poplar Grove. Confirm your tap reading before sizing equipment.

Is hard water in Poplar Grove, 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 Poplar Grove, IL?

Poplar Grove, Illinois is served by 6 matched water systems across 1 zip code.

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