How does Park Ridge's water compare to the national average?

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

Park Ridge Water Hardness & Quality Report (2026)

Water Hardness

hard

~120–179 mg/L

Hard

estimated · not lab-verified

Source

river

pH Level

7.9

neutral = 7.0

Lead

0.004 mg/L

✓ Below action level

TDS

302.3 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 Park Ridge, your appliances are currently losing 20% efficiency due to mineral buildup.

Appliance	In Park Ridge	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 Park Ridge compares to its nearest neighbours

City	Hardness	Risk	Source
▶ Park Ridge, Illinois	≈ 120–179 mg/L	🟠 Hard	river
Niles, Illinois	≈ 120–179 mg/L	🟠 Hard	river
Des Plaines, Illinois	≈ 120–179 mg/L	🟠 Hard	river
Norridge, Illinois	≈ 180+ mg/L	🔴 Very Hard	river
Schiller Park, Illinois	≈ 120–179 mg/L	🟠 Hard	river

National Benchmark

How Park Ridge compares to the USA average

Benchmark	Hardness	Appliance Risk
▶ Park Ridge	≈ 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 Park Ridge's Water Unique?

Local geology and source profile

Source: RiverTDS: 302.3 mg/LpH: 7.9

Park Ridge, Illinois, is served by the City of Park Ridge Water Department, which purchases treated drinking water from the City of Chicago's Department of Water Management. The primary source is Lake Michigan, drawn through intake cribs and processed at facilities including the Jardine Water Purification Plant and South Water Purification Plant in Chicago. Service covers the city of Park Ridge in Cook County, providing water to approximately 37,000 residents across 6.6 square miles; no dedicated local treatment plants exist, as water is received post-treatment and distributed via municipal mains.

The water originates from the Lake Michigan watershed, North America's largest freshwater system by surface area. Chicago's intakes are located 2–3 miles offshore in the lake, drawing water influenced by glacial till, Paleozoic sedimentary rocks including Silurian dolomite and limestone, and surficial glacial aquifers. These carbonate formations contribute dissolved minerals, resulting in a hard supply character; any local groundwater supplements derive from similar glacial drift over bedrock, further enhancing mineral content without softening influences.

Hard water in Park Ridge leads to scale buildup in pipes, heaters, and fixtures, reducing efficiency and lifespan; water heaters, dishwashers, washing machines, and coffee makers are most affected, with mineral deposits increasing energy use by up to 20–30%. Recommended maintenance includes sediment pre-filters, annual heater flushing, and vinegar soaks for faucets; a water softener is recommended for hard supplies to mitigate spotting on dishes, dry skin, and soap inefficiency. Water sourced from Chicago typically maintains pH 7.5–8.5 with strong regulatory compliance; lead and copper levels meet EPA action levels through corrosion control, with older homes advised to use filters; no specific PFAS exceedances noted in recent reports; Chicago's treatment includes coagulation, flocculation, sedimentation, dual-media filtration, chloramination, fluoride addition, and ammonia for stability.

Geology & Source: Lake Michigan watershed via Chicago supply — Paleozoic Silurian limestone and dolomite bedrock under glacial drift; calcium and magnesium dissolution from carbonate formations yields hard water

Other Illinois Water Reports

Niles

≈ 120–179 mg/L

🟠 Hard

Des Plaines

≈ 120–179 mg/L

🟠 Hard

Norridge

≈ 180+ mg/L

🔴 Very Hard

Schiller Park

≈ 120–179 mg/L

🟠 Hard

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

Frequently Asked Questions

Is Park Ridge's water safe to drink?

Yes. Park Ridge'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 Park Ridge?

At ≈ 120–179 mg/L (Hard), Park Ridge'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 Park Ridge compare to the USA average?

The USA national average is 151 mg/L. Park Ridge (≈ 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 Park Ridge 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.