Armour Square 1

Monitoring Station · Near South Side, United States
30
Good
Air quality is satisfactory. Enjoy outdoor activities.
Last Reading

Nearby Monitoring Stations

GoodModerateUSGUnhealthyVery UnhealthyHazardous
AQI Forecast Calibrated
29 5pm
30
30
31 8pm
31
31
31 11pm
44
44
44 2am
44
69
69 5am
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—
— 8am
—
—
— 11am
—
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— 2pm
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Station readings
29
30
30
CAMS model adj -6
37
37
37
37
37
37
37
50
50
50
50
75
75

Air Quality Trend (24h)

PM2.57.3 µg/m³ ✓ WHO
Good

Nearby Monitoring Stations

30
Near South Side 2
1.4 km PM2.5: 7.2 µg/m³
30
Lower West Side 3
1.4 km PM2.5: 7.1 µg/m³
31
Armour Square 2
1.6 km PM2.5: 7.5 µg/m³
30
Near West Side 4
1.6 km PM2.5: 7.3 µg/m³
26
Near West Side 4
1.9 km PM2.5: 6.3 µg/m³
30
Douglas 1
2.0 km PM2.5: 7.1 µg/m³
28
Near South Side 1
2.1 km PM2.5: 6.8 µg/m³
29
Bridgeport 1
2.2 km PM2.5: 6.9 µg/m³

Nearby Cities

28 Near South Side 28 Chicago 28 Bridgeport 28 Douglas 28 Lower West Side 28 Chicago Loop 28 McKinley Park 28 Grand Boulevard 28 Near North Side

Station data from AQICN. AQI forecast from ECMWF CAMS. AQI calculated using US EPA standard. Updated 2026-04-09T20:27 UTC.