Near South Side Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

river

pH Level

8.2

neutral = 7.0

Lead

0.005 mg/L

✓ Below action level

TDS

433.6 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 Near South Side, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Near South Side	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 Near South Side compares to its nearest neighbours

City	Hardness	PFAS (ppt)	Risk	Source
▶ Near South Side, Illinois	≈ 120–179 mg/L	7.1 ppt	🟠 Hard	river
Douglas, Illinois	≈ 180+ mg/L	6.1 ppt	🔴 Very Hard	river
Chicago, Illinois	140 mg/L	6 ppt	🟠 Hard	river
Chicago Loop, Illinois	130 mg/L	0 ppt	🟠 Hard	river
Bridgeport, Illinois	≈ 120–179 mg/L	7.7 ppt	🟠 Hard	groundwater

National Benchmark

How Near South Side compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Near South Side	≈ 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 Near South Side's Water Unique?

Local geology and source profile

Source: RiverTDS: 433.6 mg/LpH: 8.2

The City of Chicago Department of Water Management serves the Near South Side and all of Chicago. The primary source is Lake Michigan, supplemented by groundwater from deep aquifers. Treatment plants process water before distribution throughout Cook County. The utility operates under EPA Safe Drinking Water Act compliance and publishes annual Consumer Confidence Reports detailing water quality parameters for all residents served.

The supply derives from the Lake Michigan watershed and underlying Ordovician–Silurian carbonate formations — dolomite and limestone. These rock layers dissolve readily, releasing calcium and magnesium ions that create a hard water supply characteristic of northern Illinois. The region's carbonate bedrock is the primary driver of mineral content in both lake-derived and groundwater sources distributed throughout the service area.

Chicago's hard water — averaging 130–150 ppm (7.6–8.8 gpg) — causes scale buildup in pipes, water heaters, and appliances. Dishwashers and washing machines experience reduced efficiency, and soap effectiveness is diminished. A water softener is recommended for households seeking to reduce mineral deposits and improve soap lather. The City of Chicago publishes annual Consumer Confidence Reports detailing pH, lead/copper compliance, and other contaminants; residents should consult the City of Chicago Water Management website for current annual water quality reports.

Geology & Source: Lake Michigan watershed and underlying Ordovician-Silurian dolomite and limestone formations — carbonate bedrock dissolves calcium and magnesium into supply; hard water typical of northern Illinois geology

Other Illinois Water Reports

Douglas

≈ 180+ mg/L

🔴 Very Hard

Chicago

140 mg/L

🟠 Hard

Chicago Loop

130 mg/L

🟠 Hard

Bridgeport

≈ 120–179 mg/L

🟠 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 Near South Side's water safe to drink?

Yes. Near South Side'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 Near South Side?

At ≈ 120–179 mg/L (Hard), Near South Side'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 Near South Side compare to the USA average?

The USA national average is 151 mg/L. Near South Side (≈ 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 Near South Side 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.