SmogRank / United States / Illinois

Air quality in Chicago

Illinois, United States. PM2.5 from 3 reference monitors, updated hourly.

10.8 µg/m³
Moderate

Latest hour (04:00 UTC), 0.7× the WHO 24-hour guideline.

Rank

24 h
–
not enough data
7 days
#1,095
of 2,330 · 7.5 µg/m³
30 days
#861
of 2,327 · 7.0 µg/m³
Year
#675
of 2,160 · 9.9 µg/m³

Why it ranks here

Seasonal. Over the past year its worst months were July, averaging up to 24.3 µg/m³ against 6.2 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Chicago's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

Last 4 days, hour by hour

15302026-10-01 00:00 UTC: 10.9 µg/m³2026-10-01 01:00 UTC: 10.3 µg/m³2026-10-01 02:00 UTC: 10.0 µg/m³2026-10-01 03:00 UTC: 10.5 µg/m³2026-10-01 04:00 UTC: 10.8 µg/m³Sep 28Sep 29Sep 30Oct 1

Times in UTC. Dashed line: WHO 24-hour guideline (15 µg/m³).

Every day for a year

SepNovDecJanFebMarAprMayJunJulAugSepMonWedFri2025-09-29: 12.5 µg/m³2025-09-30: 12.3 µg/m³2025-10-01: 7.7 µg/m³2025-10-02: 10.4 µg/m³2025-10-03: 14.9 µg/m³2025-10-04: 14.2 µg/m³2025-10-05: 9.2 µg/m³2025-10-06: 7.6 µg/m³2025-10-07: 3.9 µg/m³2025-10-08: 4.1 µg/m³2025-10-09: 5.2 µg/m³2025-10-10: 7.9 µg/m³2025-10-11: 3.3 µg/m³2025-10-12: 5.2 µg/m³2025-10-13: 11.0 µg/m³2025-10-14: 11.8 µg/m³2025-10-15: 4.0 µg/m³2025-10-16: 5.7 µg/m³2025-10-17: 5.1 µg/m³2025-10-18: 12.5 µg/m³2025-10-19: 3.9 µg/m³2025-10-20: 4.1 µg/m³2025-10-21: 3.5 µg/m³2025-10-22: 2.2 µg/m³2025-10-23: 3.5 µg/m³2025-10-24: 6.5 µg/m³2025-10-25: 10.2 µg/m³2025-10-26: 8.4 µg/m³2025-10-27: 5.6 µg/m³2025-10-28: 5.7 µg/m³2025-10-29: 4.9 µg/m³2025-10-30: 5.4 µg/m³2025-10-31: 10.1 µg/m³2025-11-01: 7.3 µg/m³2025-11-02: 5.8 µg/m³2025-11-03: 4.5 µg/m³2025-11-04: 6.7 µg/m³2025-11-05: 8.9 µg/m³2025-11-06: 7.7 µg/m³2025-11-07: 6.6 µg/m³2025-11-08: 2.9 µg/m³2025-11-09: 2.6 µg/m³2025-11-10: 2.4 µg/m³2025-11-11: 5.4 µg/m³2025-11-12: 4.5 µg/m³2025-11-13: 6.5 µg/m³2025-11-14: no data2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: no data2025-11-19: no data2025-11-20: no data2025-11-21: 15.4 µg/m³2025-11-22: 11.2 µg/m³2025-11-23: 14.1 µg/m³2025-11-24: 15.9 µg/m³2025-11-25: 13.6 µg/m³2025-11-26: 2.5 µg/m³2025-11-27: 2.7 µg/m³2025-11-28: 4.8 µg/m³2025-11-29: 7.3 µg/m³2025-11-30: 4.8 µg/m³2025-12-01: 10.6 µg/m³2025-12-02: 17.0 µg/m³2025-12-03: 14.3 µg/m³2025-12-04: 8.1 µg/m³2025-12-05: 13.0 µg/m³2025-12-06: 17.2 µg/m³2025-12-07: 8.4 µg/m³2025-12-08: 6.4 µg/m³2025-12-09: 12.9 µg/m³2025-12-10: 6.8 µg/m³2025-12-11: 8.2 µg/m³2025-12-12: 17.2 µg/m³2025-12-13: 4.9 µg/m³2025-12-14: 4.0 µg/m³2025-12-15: 7.2 µg/m³2025-12-16: 12.9 µg/m³2025-12-17: 15.6 µg/m³2025-12-18: 9.2 µg/m³2025-12-19: 4.6 µg/m³2025-12-20: 4.3 µg/m³2025-12-21: 4.9 µg/m³2025-12-22: 5.3 µg/m³2025-12-23: 13.7 µg/m³2025-12-24: 16.2 µg/m³2025-12-25: 19.0 µg/m³2025-12-26: 12.5 µg/m³2025-12-27: 14.4 µg/m³2025-12-28: 6.9 µg/m³2025-12-29: 3.5 µg/m³2025-12-30: 4.2 µg/m³2025-12-31: 6.2 µg/m³2026-01-01: 4.6 µg/m³2026-01-02: 6.4 µg/m³2026-01-03: 6.7 µg/m³2026-01-04: 8.8 µg/m³2026-01-05: 18.1 µg/m³2026-01-06: 24.5 µg/m³2026-01-07: 13.7 µg/m³2026-01-08: 11.5 µg/m³2026-01-09: 5.9 µg/m³2026-01-10: 6.7 µg/m³2026-01-11: 5.4 µg/m³2026-01-12: 5.6 µg/m³2026-01-13: 6.2 µg/m³2026-01-14: 2.7 µg/m³2026-01-15: 2.8 µg/m³2026-01-16: 5.4 µg/m³2026-01-17: 4.0 µg/m³2026-01-18: 4.0 µg/m³2026-01-19: 4.2 µg/m³2026-01-20: 5.1 µg/m³2026-01-21: 8.4 µg/m³2026-01-22: 4.6 µg/m³2026-01-23: 7.2 µg/m³2026-01-24: 7.0 µg/m³2026-01-25: 5.4 µg/m³2026-01-26: 7.2 µg/m³2026-01-27: 8.1 µg/m³2026-01-28: 6.0 µg/m³2026-01-29: 4.9 µg/m³2026-01-30: 4.5 µg/m³2026-01-31: 3.5 µg/m³2026-02-01: 8.1 µg/m³2026-02-02: 15.8 µg/m³2026-02-03: 9.7 µg/m³2026-02-04: 8.8 µg/m³2026-02-05: 18.1 µg/m³2026-02-06: 10.8 µg/m³2026-02-07: 4.0 µg/m³2026-02-08: 7.3 µg/m³2026-02-09: 16.2 µg/m³2026-02-10: 16.1 µg/m³2026-02-11: 8.0 µg/m³2026-02-12: 9.3 µg/m³2026-02-13: 12.2 µg/m³2026-02-14: 19.3 µg/m³2026-02-15: 26.4 µg/m³2026-02-16: 14.9 µg/m³2026-02-17: 15.3 µg/m³2026-02-18: 7.9 µg/m³2026-02-19: 9.0 µg/m³2026-02-20: 6.2 µg/m³2026-02-21: 8.3 µg/m³2026-02-22: 3.8 µg/m³2026-02-23: 3.6 µg/m³2026-02-24: 10.7 µg/m³2026-02-25: 10.8 µg/m³2026-02-26: 16.0 µg/m³2026-02-27: 11.4 µg/m³2026-02-28: 4.1 µg/m³2026-03-01: 2.4 µg/m³2026-03-02: 7.4 µg/m³2026-03-03: 18.5 µg/m³2026-03-04: 27.4 µg/m³2026-03-05: 20.9 µg/m³2026-03-06: 14.0 µg/m³2026-03-07: 4.8 µg/m³2026-03-08: 5.6 µg/m³2026-03-09: 6.7 µg/m³2026-03-10: 8.9 µg/m³2026-03-11: 4.8 µg/m³2026-03-12: 4.6 µg/m³2026-03-13: 3.3 µg/m³2026-03-14: 4.0 µg/m³2026-03-15: 5.2 µg/m³2026-03-16: 2.8 µg/m³2026-03-17: 3.3 µg/m³2026-03-18: 8.0 µg/m³2026-03-19: 20.6 µg/m³2026-03-20: 17.7 µg/m³2026-03-21: 14.4 µg/m³2026-03-22: 7.6 µg/m³2026-03-23: 3.5 µg/m³2026-03-24: 7.8 µg/m³2026-03-25: 14.2 µg/m³2026-03-26: 15.3 µg/m³2026-03-27: 4.6 µg/m³2026-03-28: 5.2 µg/m³2026-03-29: 9.4 µg/m³2026-03-30: 10.5 µg/m³2026-03-31: 11.4 µg/m³2026-04-01: 3.6 µg/m³2026-04-02: 7.4 µg/m³2026-04-03: 4.4 µg/m³2026-04-04: 4.6 µg/m³2026-04-05: 3.3 µg/m³2026-04-06: 4.1 µg/m³2026-04-07: 3.3 µg/m³2026-04-08: 6.5 µg/m³2026-04-09: 7.5 µg/m³2026-04-10: 6.6 µg/m³2026-04-11: 8.5 µg/m³2026-04-12: 9.2 µg/m³2026-04-13: 5.4 µg/m³2026-04-14: 6.1 µg/m³2026-04-15: 5.0 µg/m³2026-04-16: 5.0 µg/m³2026-04-17: 11.3 µg/m³2026-04-18: 3.9 µg/m³2026-04-19: 4.0 µg/m³2026-04-20: 5.8 µg/m³2026-04-21: 6.5 µg/m³2026-04-22: 10.1 µg/m³2026-04-23: 14.2 µg/m³2026-04-24: 7.9 µg/m³2026-04-25: 4.5 µg/m³2026-04-26: 9.9 µg/m³2026-04-27: 6.5 µg/m³2026-04-28: 3.4 µg/m³2026-04-29: 3.7 µg/m³2026-04-30: 6.7 µg/m³2026-05-01: 5.1 µg/m³2026-05-02: 6.0 µg/m³2026-05-03: 6.0 µg/m³2026-05-04: 6.9 µg/m³2026-05-05: 3.1 µg/m³2026-05-06: 4.6 µg/m³2026-05-07: 6.4 µg/m³2026-05-08: 13.5 µg/m³2026-05-09: 6.3 µg/m³2026-05-10: 5.1 µg/m³2026-05-11: 3.2 µg/m³2026-05-12: 5.2 µg/m³2026-05-13: 4.3 µg/m³2026-05-14: 4.4 µg/m³2026-05-15: 5.3 µg/m³2026-05-16: 6.9 µg/m³2026-05-17: 12.5 µg/m³2026-05-18: 7.3 µg/m³2026-05-19: 5.1 µg/m³2026-05-20: 2.2 µg/m³2026-05-21: 3.9 µg/m³2026-05-22: 4.7 µg/m³2026-05-23: 5.9 µg/m³2026-05-24: 8.7 µg/m³2026-05-25: 10.3 µg/m³2026-05-26: 6.6 µg/m³2026-05-27: 10.7 µg/m³2026-05-28: 4.2 µg/m³2026-05-29: 7.0 µg/m³2026-05-30: 7.6 µg/m³2026-05-31: 4.4 µg/m³2026-06-01: 4.1 µg/m³2026-06-02: 4.5 µg/m³2026-06-03: 6.6 µg/m³2026-06-04: 9.6 µg/m³2026-06-05: 10.9 µg/m³2026-06-06: 7.2 µg/m³2026-06-07: 6.4 µg/m³2026-06-08: 8.0 µg/m³2026-06-09: 5.7 µg/m³2026-06-10: 7.9 µg/m³2026-06-11: 3.5 µg/m³2026-06-12: 3.5 µg/m³2026-06-13: 4.7 µg/m³2026-06-14: 3.1 µg/m³2026-06-15: 3.4 µg/m³2026-06-16: 3.4 µg/m³2026-06-17: 5.6 µg/m³2026-06-18: 3.5 µg/m³2026-06-19: 3.5 µg/m³2026-06-20: 4.1 µg/m³2026-06-21: 10.5 µg/m³2026-06-22: 3.4 µg/m³2026-06-23: 4.1 µg/m³2026-06-24: 6.5 µg/m³2026-06-25: 4.4 µg/m³2026-06-26: 4.7 µg/m³2026-06-27: 8.8 µg/m³2026-06-28: 9.7 µg/m³2026-06-29: 11.0 µg/m³2026-06-30: 20.4 µg/m³2026-07-01: 20.5 µg/m³2026-07-02: 11.6 µg/m³2026-07-03: 6.9 µg/m³2026-07-04: 17.9 µg/m³2026-07-05: 16.6 µg/m³2026-07-06: 8.7 µg/m³2026-07-07: 10.3 µg/m³2026-07-08: 12.6 µg/m³2026-07-09: 10.5 µg/m³2026-07-10: 6.8 µg/m³2026-07-11: 8.7 µg/m³2026-07-12: 13.1 µg/m³2026-07-13: 18.9 µg/m³2026-07-14: 14.6 µg/m³2026-07-15: 11.9 µg/m³2026-07-16: 233.0 µg/m³2026-07-17: 111.0 µg/m³2026-07-18: 29.9 µg/m³2026-07-19: 51.3 µg/m³2026-07-20: 43.4 µg/m³2026-07-21: 10.6 µg/m³2026-07-22: 3.9 µg/m³2026-07-23: 7.0 µg/m³2026-07-24: 9.2 µg/m³2026-07-25: 9.3 µg/m³2026-07-26: 13.6 µg/m³2026-07-27: 11.6 µg/m³2026-07-28: 8.7 µg/m³2026-07-29: 4.7 µg/m³2026-07-30: 8.1 µg/m³2026-07-31: 9.2 µg/m³2026-08-01: 10.3 µg/m³2026-08-02: 10.2 µg/m³2026-08-03: 8.2 µg/m³2026-08-04: 10.9 µg/m³2026-08-05: 10.8 µg/m³2026-08-06: 14.0 µg/m³2026-08-07: 9.3 µg/m³2026-08-08: 9.9 µg/m³2026-08-09: 10.1 µg/m³2026-08-10: 15.2 µg/m³2026-08-11: 10.7 µg/m³2026-08-12: 7.6 µg/m³2026-08-13: 19.1 µg/m³2026-08-14: 14.2 µg/m³2026-08-15: 5.5 µg/m³2026-08-16: 5.0 µg/m³2026-08-17: 4.2 µg/m³2026-08-18: 6.6 µg/m³2026-08-19: 6.8 µg/m³2026-08-20: 12.1 µg/m³2026-08-21: 14.2 µg/m³2026-08-22: 8.0 µg/m³2026-08-23: 15.5 µg/m³2026-08-24: 7.9 µg/m³2026-08-25: 8.7 µg/m³2026-08-26: 10.6 µg/m³2026-08-27: 8.7 µg/m³2026-08-28: 13.1 µg/m³2026-08-29: 12.6 µg/m³2026-08-30: 11.1 µg/m³2026-08-31: 13.8 µg/m³2026-09-01: 15.2 µg/m³2026-09-02: 15.3 µg/m³2026-09-03: 10.1 µg/m³2026-09-04: 10.7 µg/m³2026-09-05: 7.3 µg/m³2026-09-06: 5.8 µg/m³2026-09-07: 5.6 µg/m³2026-09-08: 7.3 µg/m³2026-09-09: 5.8 µg/m³2026-09-10: 4.6 µg/m³2026-09-11: 6.8 µg/m³2026-09-12: 7.4 µg/m³2026-09-13: 4.5 µg/m³2026-09-14: 5.0 µg/m³2026-09-15: 7.2 µg/m³2026-09-16: 5.4 µg/m³2026-09-17: 5.7 µg/m³2026-09-18: 3.9 µg/m³2026-09-19: 9.4 µg/m³2026-09-20: 4.3 µg/m³2026-09-21: 3.2 µg/m³2026-09-22: 3.2 µg/m³2026-09-23: 4.5 µg/m³2026-09-24: 4.3 µg/m³2026-09-25: 6.7 µg/m³2026-09-26: 7.0 µg/m³2026-09-27: 9.5 µg/m³2026-09-28: 7.3 µg/m³2026-09-29: 10.0 µg/m³2026-09-30: no data
Good 0–9.0Moderate 9.1+Unhealthy for sensitive groups 35.5+Unhealthy 55.5+Very unhealthy 125.5+Hazardous 225.5+No data

39 of 357 measured days were over the WHO 24-hour guideline.

Daily world rank

#1#2167OctNovDecJanFebMarAprMayJunJulAugSep

Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2025: 6.6 µg/m³Jan 2026: 7.1 µg/m³JanFeb 2025: 8.1 µg/m³Feb 2026: 11.1 µg/m³FebMar 2025: 7.2 µg/m³Mar 2026: 9.5 µg/m³MarApr 2025: 6.8 µg/m³Apr 2026: 6.3 µg/m³AprMay 2025: 6.1 µg/m³May 2026: 6.2 µg/m³MayJun 2025: 16.1 µg/m³Jun 2026: 6.4 µg/m³JunJul 2025: 15.2 µg/m³Jul 2026: 24.3 µg/m³JulAug 2025: 13.4 µg/m³Aug 2026: 10.5 µg/m³AugSep 2025: 10.4 µg/m³Sep 2026: 7.0 µg/m³SepOct 2025: 7.0 µg/m³OctNov 2025: 7.1 µg/m³NovDec 2025: 10.0 µg/m³Dec

Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 7.5 µg/m³7.520252025: 9.4 µg/m³9.4

Mean PM2.5 for 24 Sept to 30 Sept in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
CHI_COMUS Public DomainAirNowReference
CHI_SPUS Public DomainAirNowReference
Cicero LibertyUS Public DomainAirNowReference
NettelhorstCC BY 4.0Nettelhorst Idling CrewLow-cost
South LoopCC BY 4.0AirGradientLow-cost
South LoopCC BY 4.0AirGradientLow-cost
Prairie District, South Loop, ChicagoCC BY 4.0openEyeSignalLow-cost
Lakeview, ChicagoCC BY 4.0mattikusLow-cost
Wicker Park, ChicagoCC BY 4.0AirGradientLow-cost
Chicago-Logan SquareCC BY 4.0AirGradientLow-cost
Milwaukee/Division/PaulinaCC BY 4.0AirGradientLow-cost
AvondaleCC BY 4.0AirGradientLow-cost
West Town 1CC0 1.0ClarityLow-cost
West Lawn 1CC0 1.0ClarityLow-cost
Woodlawn 2CC0 1.0ClarityLow-cost
Douglas 2CC0 1.0ClarityLow-cost
Greater Grand Crossing 1CC0 1.0ClarityLow-cost
West Englewood 2CC0 1.0ClarityLow-cost
Hyde Park 1CC0 1.0ClarityLow-cost
Kenwood 1CC0 1.0ClarityLow-cost
Lincoln Park 1CC0 1.0ClarityLow-cost
Avondale 1CC0 1.0ClarityLow-cost
Archer Heights 1CC0 1.0ClarityLow-cost
Humboldt Park 1CC0 1.0ClarityLow-cost
Loop 2CC0 1.0ClarityLow-cost
South Shore 1CC0 1.0ClarityLow-cost
Near North Side 1CC0 1.0ClarityLow-cost
Hermosa 1CC0 1.0ClarityLow-cost
Auburn Gresham 1CC0 1.0ClarityLow-cost
Near South Side 1CC0 1.0ClarityLow-cost
Englewood 1CC0 1.0ClarityLow-cost
North Center 1CC0 1.0ClarityLow-cost
West Elsdon 2CC0 1.0ClarityLow-cost
Near West Side 2CC0 1.0ClarityLow-cost
Logan Square 1CC0 1.0ClarityLow-cost
Austin 1CC0 1.0ClarityLow-cost
East Garfield Park 1CC0 1.0ClarityLow-cost
Gage Park 1CC0 1.0ClarityLow-cost
Lake View 1CC0 1.0ClarityLow-cost
Chicago Lawn 1CC0 1.0ClarityLow-cost
Brighton Park 1CC0 1.0ClarityLow-cost
Garfield Ridge 1CC0 1.0ClarityLow-cost
Lake View 2CC0 1.0ClarityLow-cost
Archer Heights 3CC0 1.0ClarityLow-cost
Lower West Side 3CC0 1.0ClarityLow-cost
Austin 8CC0 1.0ClarityLow-cost
West Lawn 4CC0 1.0ClarityLow-cost
Gage Park 3CC0 1.0ClarityLow-cost
Greater Grand Crossing 3CC0 1.0ClarityLow-cost
Ashburn 3CC0 1.0ClarityLow-cost
Austin 4CC0 1.0ClarityLow-cost
Brighton Park 3CC0 1.0ClarityLow-cost
West Elsdon 1CC0 1.0ClarityLow-cost
Englewood 6CC0 1.0ClarityLow-cost
New City 1CC0 1.0ClarityLow-cost
New City 3CC0 1.0ClarityLow-cost
North Lawndale 3CC0 1.0ClarityLow-cost
Lower West Side 5CC0 1.0ClarityLow-cost
North Lawndale 2CC0 1.0ClarityLow-cost
Lower West Side 2CC0 1.0ClarityLow-cost
North Lawndale 1CC0 1.0ClarityLow-cost
Fuller Park 1CC0 1.0ClarityLow-cost
Armour Square 3CC0 1.0ClarityLow-cost
Lower West Side 1CC0 1.0ClarityLow-cost
McKinley Park 2CC0 1.0ClarityLow-cost
South Lawndale 2CC0 1.0ClarityLow-cost
South Lawndale 1CC0 1.0ClarityLow-cost
South Lawndale 3CC0 1.0ClarityLow-cost
Armour Square 1CC0 1.0ClarityLow-cost
South Lawndale 6CC0 1.0ClarityLow-cost
Douglas 1CC0 1.0ClarityLow-cost
North Lawndale 5CC0 1.0ClarityLow-cost
Bridgeport 2CC0 1.0ClarityLow-cost
New City 4CC0 1.0ClarityLow-cost
Near South Side 2CC0 1.0ClarityLow-cost
Armour Square 2CC0 1.0ClarityLow-cost
Near West Side 4CC0 1.0ClarityLow-cost
North Lawndale 4CC0 1.0ClarityLow-cost
Near West Side 5CC0 1.0ClarityLow-cost
Bridgeport 1CC0 1.0ClarityLow-cost
Near West Side 6CC0 1.0ClarityLow-cost
Avalon Park 1CC0 1.0ClarityLow-cost
New City 2CC0 1.0ClarityLow-cost
New City 5CC0 1.0ClarityLow-cost
Englewood 2CC0 1.0ClarityLow-cost
Humboldt Park 3CC0 1.0ClarityLow-cost
West Town 2CC0 1.0ClarityLow-cost
West Garfield Park 1CC0 1.0ClarityLow-cost
East Garfield Park 2CC0 1.0ClarityLow-cost
Logan Square 3CC0 1.0ClarityLow-cost
Avondale 2CC0 1.0ClarityLow-cost
Lake View 4CC0 1.0ClarityLow-cost
Chicago Lawn 3CC0 1.0ClarityLow-cost
Lincoln Park 2CC0 1.0ClarityLow-cost
Englewood 3CC0 1.0ClarityLow-cost
Englewood 5CC0 1.0ClarityLow-cost
Washington Park 1CC0 1.0ClarityLow-cost
West Lawn 3CC0 1.0ClarityLow-cost
Near North Side 4CC0 1.0ClarityLow-cost
Gage Park 2CC0 1.0ClarityLow-cost
Lake View 3CC0 1.0ClarityLow-cost
Grand Boulevard 2CC0 1.0ClarityLow-cost
Austin 9CC0 1.0ClarityLow-cost
Hyde Park 4CC0 1.0ClarityLow-cost
Near West Side 4CC0 1.0ClarityLow-cost
South Lawndale 5CC0 1.0ClarityLow-cost
Irving Park 2CC0 1.0ClarityLow-cost
Ashburn 4CC0 1.0ClarityLow-cost
Austin 3CC0 1.0ClarityLow-cost
McKinley Park 1CC0 1.0ClarityLow-cost
Logan Square 2CC0 1.0ClarityLow-cost
Oakland 1CC0 1.0ClarityLow-cost
Greater Grand Crossing 6CC0 1.0ClarityLow-cost
Austin 2CC0 1.0ClarityLow-cost
Hyde Park 3CC0 1.0ClarityLow-cost
Austin 5CC0 1.0ClarityLow-cost
Near West Side 3CC0 1.0ClarityLow-cost
West Englewood 1CC0 1.0ClarityLow-cost
Brighton Park 2CC0 1.0ClarityLow-cost
Auburn Gresham 2CC0 1.0ClarityLow-cost
Belmont Cragin 4CC0 1.0ClarityLow-cost
West Town 3CC0 1.0ClarityLow-cost
Grand Boulevard 1CC0 1.0ClarityLow-cost
Gage Park 4CC0 1.0ClarityLow-cost
Chicago Lawn 2CC0 1.0ClarityLow-cost
Archer Heights 2CC0 1.0ClarityLow-cost
Garfield Ridge 2CC0 1.0ClarityLow-cost
West Lawn 2CC0 1.0ClarityLow-cost
Woodlawn 1CC0 1.0ClarityLow-cost
Austin 7CC0 1.0ClarityLow-cost
Greater Grand Crossing 5CC0 1.0ClarityLow-cost
Humboldt Park 4CC0 1.0ClarityLow-cost
South Shore 2CC0 1.0ClarityLow-cost
Chicago Lawn 4CC0 1.0ClarityLow-cost
Near West Side 1CC0 1.0ClarityLow-cost
Hermosa 2CC0 1.0ClarityLow-cost
Greater Grand Crossing 4CC0 1.0ClarityLow-cost
Lake View 5CC0 1.0ClarityLow-cost
Austin 6CC0 1.0ClarityLow-cost
Logan Square 4CC0 1.0ClarityLow-cost
Archer Heights 4CC0 1.0ClarityLow-cost
West Town 5CC0 1.0ClarityLow-cost
Englewood 4CC0 1.0ClarityLow-cost
West Englewood 3CC0 1.0ClarityLow-cost
Humboldt Park 2CC0 1.0ClarityLow-cost
Near North Side 3CC0 1.0ClarityLow-cost
Greater Grand Crossing 2CC0 1.0ClarityLow-cost
West Town 4CC0 1.0ClarityLow-cost
Humboldt Park 5CC0 1.0ClarityLow-cost
Clearing 3CC0 1.0ClarityLow-cost
Hyde Park 2CC0 1.0ClarityLow-cost
Loop 1CC0 1.0ClarityLow-cost
South Lawndale 4CC0 1.0ClarityLow-cost

The city's value is the median of its reference monitors each hour; low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in United States

Calexico 22.9Jurupa Valley 12.9Riverside 12.4Little Rock 12.2Hanford 12.0Oceanside 11.9Laredo 11.4Clovis 11.2Fontana 11.2Corcoran 11.1Shreveport 11.0Wake Forest 11.0

30-day averages, µg/m³. All of United States →

Updated 2026-10-01 05:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.