Is Chicago tap water safe to drink?

Yes but with caveats

Chicago's water meets EPA minimum standards but has some concerns. Filtration is recommended for sensitive individuals.

79/100

Purity Score

Issues Found

8.4 GPG

Hardness

Not detected

PFAS

3 Issues Detected in Chicago

Moderately Hard Water (8.4 GPG)

Hardness above 7 GPG can cause minor scale buildup.

Hardness data for Chicago

Moderate Chlorine Level

Chlorine within EPA limits but may affect taste.

Chlorine info for Chicago

Arsenic Approaching Limit (0.4 mg/L)

EPA limit is 0.010 mg/L.

Arsenic info for Chicago

Fix Your Water — See Recommended Filters

Illinois

606,016,060,260,603 · Lake Michigan

Chicago Water Safety and Contaminant Report

Moderate Risk Updated March 2026 2.7M residents

See Best Filters for Chicago

Purity Score

Water from Chicago's Lake Michigan supply carries notable mineral levels. This 2026 report covers hardness data, safety indicators, and filtration options matched to local conditions.

Water Quality Data

Hard water in Chicago

Chlorine

Medium

Affects taste and skin. Carbon filter removes it.

Learn about chlorine

TDS

Unknown

High TDS (>500 ppm) may affect taste.

Contaminant Levels

PFAS

Lead

8 ppb

Nitrate

0.7 mg/L

Arsenic

0.4 mg/L

Hardness

8.4 gpg

Health Insights

1
At 8.4 GPG, Chicago's water qualifies as moderately hard. This can cause limescale in pipes and shorten appliance lifespan.
2
Chlorine levels may affect the taste of Chicago's tap water. A carbon filter improves flavor.

Score

79 /100

Good

"Good" threshold (70)

Chicago tap water is sourced from Lake Michigan and treated by Chicago Department of Water Management. Water hardness is hard at 8.4 GPG which may cause scale buildup. Overall purity score: 79/100 (Good). Updated for 2026.

Fix Your Water

Best filters matched to Chicago's 3 issues.

See Filters

MATCHED TO CHICAGO'S WATER DATA

Best Water Filters for Chicago, IL (2026)

Matched to Hard Water (8.4 GPG), Moderate Chlorine in Chicago.

Hard Water (8.4 GPG) Moderate Chlorine

Best Overall #1 for Chicago

AFWFilters 5600sxt 48000 Grain Softener

Salt-Based Water Softener

$650-750

Why this fits Chicago

Handles Chicago's hard water (Hard Water (8.4 GPG))
Premium quality at $650-750

Pros & Cons +

48000 grain capacity handles very hard water

Digital metered valve saves salt

Requires salt refills monthly

Does not remove contaminants

Fix Your Water — Check Price

Best Value

Clearly Filtered Water Pitcher

Pitcher Filter

$80-95

Why this fits Chicago

Eliminates chlorine taste and odor from Chicago's water
NSF/ANSI 42 + NSF/ANSI 53 + NSF/ANSI 401 certified
Budget-friendly at $80-95

Pros & Cons +

No installation fill and pour

Removes 365+ contaminants including PFAS

Small capacity 2-3 people

Filter replacements every 4 months

Check Price on Amazon

Best for Taste

Waterdrop 10UA Under-Sink Filter

Under-Sink Carbon Filter

$40-60

Why this fits Chicago

Eliminates chlorine taste and odor from Chicago's water
NSF/ANSI 42 certified
Budget-friendly at $40-60

Pros & Cons +

Very affordable

Easy DIY install no plumber

Does not remove PFAS or hardness

Single point of use only

Check Price on Amazon

Also Recommended

Waterdrop G3P800 Tankless RO

Tankless Reverse Osmosis

$380-450

Why this fits Chicago

Eliminates chlorine taste and odor from Chicago's water
NSF/ANSI 58 + NSF 372 certified
Premium quality at $380-450

Pros & Cons +

No tank saves cabinet space

800 GPD fast flow rate

Higher upfront cost

Filter replacements are proprietary

Check Price on Amazon

As an Amazon Associate, PurityMap may earn from qualifying purchases. Based on latest Chicago water data.

Full Filter Comparison for Chicago

Know exactly what's in YOUR tap

City data shows averages. Your home may differ.

Test Your Water — $25-30

About Chicago's Water

Hard Water in Chicago: Impact on Plumbing and Appliances

At 8.4 grains per gallon, Chicago's water qualifies as hard. Hard water carries dissolved calcium and magnesium that deposit as limescale inside pipes, water heaters, dishwashers, and washing machines over time. Scale accumulation reduces appliance efficiency and shortens service life. A salt-based water softener is the most effective solution for whole-home protection. For drinking water only, a reverse osmosis system also reduces mineral content significantly.

Explore Chicago Water Data

Chicago Water FAQ

Is Chicago IL tap water safe to drink in 2026?

Chicago tap water meets EPA federal drinking water standards and scores 79/100 (Good) on PurityMap for 2026. For most healthy adults the water is considered safe but point-of-use filtration adds an important layer of protection.

Does Chicago IL use chlorine or chloramine for disinfection?

Chicago uses chlorine as the primary disinfectant with a residual level of 1.8 ppm. Standard activated carbon filters including pitcher filters are effective at removing free chlorine taste and odor.

How hard is Chicago IL water and what is the TDS level?

Chicago water hardness is 8.4 grains per gallon (hard) with a TDS of 210 ppm (fair). This level causes noticeable scale buildup in water heaters kettles and dishwashers. A water softener is recommended to protect plumbing and reduce soap usage.

Has PFAS been found in Chicago IL drinking water?

Based on available EPA UCMR5 monitoring data as of 2026 PFAS have not been detected above EPA advisory levels in Chicago drinking water.

What is the best water filter for Chicago?

Based on Chicago's water profile, we recommend the AFWFilters 5600sxt 48000 Grain Softener. Chicago has elevated chlorine residuals. An under-sink carbon filter removes chlorine and disinfection byproducts at the tap.

Nearby Reports

RockfordIllinois — 58/100 ChampaignIllinois — 73/100 ElginIllinois — 75/100 AuroraIllinois — 79/100 NapervilleIllinois — 79/100 PeoriaIllinois — 79/100

All Illinois cities

Explore Water Quality by State

Compare across all 50 US states

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Data Sources

EPA SDWIS
EWG Tap Water Database
Chicago Department of Water Management CCR
USGS monitoring data

PurityMap compiles public data. Updated March 2026.

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