How does Roscoe's water compare to the national average?

The USA national average is 151 mg/L. Roscoe (≈ 120–179 mg/L) is 1 mg/L softer than average.

Roscoe Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

groundwater

pH Level

neutral = 7.0

Lead

0.004 mg/L

✓ Below action level

TDS

340.3 mg/L

Est. Daily Cost

$0.40

energy & soap waste

Source: See methodology section below · Updated 2026

hard~120–179 mg/LHard · est.

0–60

mg/L

Soft

61–120

mg/L

Moderately Hard

121–180

mg/L

Hard

180+

mg/L

Very Hard

Appliance Damage Report

In Roscoe, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Roscoe	Soft Water City	Efficiency Loss
Kettle	6.8 yrs	8.5 yrs	-20%
Washing Machine	9.6 yrs	12 yrs	-20%
Water Heater	12 yrs	15 yrs	-20%

Regional Water Comparison

How Roscoe compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Roscoe, Illinois	≈ 120–179 mg/L	6.1 ppt	🟠 Hard	groundwater
Machesney Park, Illinois	≈ 180+ mg/L	129.5 ppt	🔴 Very Hard	groundwater
Beloit, Wisconsin	346 mg/L	3 ppt	🔴 Very Hard	groundwater
Loves Park, Illinois	≈ 180+ mg/L	0 ppt	🔴 Very Hard	groundwater
Rockford, Illinois	≈ 180+ mg/L	17.1 ppt	🔴 Very Hard	groundwater

National Benchmark

How Roscoe compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Roscoe	≈ 120–179 mg/L	🟠 Moderate
USA National Avg	151 mg/L	🟠 Moderate
Scarsdale Top Rated	0.02 mg/L	🟢 None

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What Makes Roscoe's Water Unique?

Local geology and source profile

Source: GroundwaterTDS: 340.3 mg/LpH: 8

I couldn't find specific water quality data for Roscoe, Illinois. There's no dedicated utility website, Consumer Confidence Report, or EPA entry for the village. One site prompted for a zip code but offered no actual results. To learn about your tap water, you should contact the Village of Roscoe directly or check their municipal website. You can also request the latest Consumer Confidence Report from your local water provider or consult the Illinois Department of Public Health, which oversees public water systems.

Roscoe is in Winnebago County, drawing its water from the Rock River. This river's supply originates from the highly dolomitic Silurian Niagaran Dolomite and the calcareous Ordovician Galena Dolomite. These bedrock types contribute significantly to the water's overall hardness. The specific geological formations in Winnebago County dictate the mineral content found in the groundwater.

This water's hardness means you might notice scale buildup on fixtures and inside appliances like coffee makers and water heaters. Soap and detergent won't lather as readily, requiring you to use more product. Homeowners often find that installing a water softener significantly improves appliance longevity and reduces cleaning chores. While the mineral content contributes to hardness, it's generally safe for consumption.

Geology & Source: Silurian Niagaran Dolomite; Ordovician Galena Dolomite; dolomitic bedrock produces hard water

Other Illinois Water Reports

Machesney Park

≈ 180+ mg/L

🔴 Very Hard

Beloit

346 mg/L

🔴 Very Hard

Loves Park

≈ 180+ mg/L

🔴 Very Hard

Rockford

≈ 180+ mg/L

🔴 Very Hard

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Notice an error or missing data? Help us keep this page accurate. If you spot incorrect water hardness, outdated utility info, or missing details, please let us know.

All reports are reviewed by our team. Thank you for supporting data quality!

Frequently Asked Questions

Is Roscoe's water safe to drink?

Yes. Roscoe's water meets all federal safety standards. The hardness is ≈ 120–179 mg/L (Hard), which is safe to drink. High hardness affects appliances and taste, but poses no health risk.

Do I need a water softener in Roscoe?

At ≈ 120–179 mg/L (Hard), Roscoe's water will cause significant limescale on kettles, washing machines, and water heaters. A water softener or descaler is strongly recommended to extend appliance lifespan and reduce energy bills by up to 20%.

How does Roscoe compare to the USA average?

The USA national average is 151 mg/L. Roscoe (≈ 120–179 mg/L) is 1 mg/L below the national average. The softest major city is Scarsdale at just 0.02 mg/L.

Data Sources & Methodology

Water quality data for Roscoe is derived from geographic and geological modelling of the surrounding region. No federal monitoring station data was available for this location.

Estimated

Water Hardness

Modelled estimate based on state-level USGS geological survey data for this region. No direct USGS Water Quality Portal measurement was matched to this city — the value reflects a statistical range calibrated to the state's dominant rock types and typical source water characteristics.

Estimated

Estimated from regional geology and source water characteristics. pH is correlated with water hardness and local bedrock — values may differ from utility-reported figures.

Estimated

TDS — Total Dissolved Solids

Estimated using a derived ratio from water hardness and regional conductance profiles. TDS in natural water correlates strongly with total mineral content including hardness ions.

Measured

PFAS — Perfluoroalkyl and Polyfluoroalkyl Substances

EPA UCMR5 (5th Unregulated Contaminant Monitoring Rule, 2023–2025) — sum of PFAS compounds detected at the public water system serving this city. A value of 0 indicates the system was sampled with no detection above reporting limits.

Modelled

Lead

Modelled estimate based on the EPA Lead and Copper Rule 90th-percentile tap-sample methodology. No publicly available per-city lead dataset with sufficient national coverage exists. Values are a conservative baseline derived from city population tier and infrastructure age — all estimates are maintained below the EPA action level of 0.015 mg/L.

Calculated

Appliance Lifespan

Calculated from water hardness using a linear degradation model. Baseline lifespans represent soft-water performance (kettle: 8.5 yrs, washing machine: 12.0 yrs, water heater: 15.0 yrs). Hard water mineral scale progressively reduces operational life in direct proportion to hardness concentration.