Chicago Air Quality Conditions
At 6 PM the AQI was 46 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 46 or 9.38 µg/m³
PM10 = 14 or NA µg/m³
NO₂ = 9 or 10 ppb
SO₂ = 1 or 0.8 ppb
O₃ = 35 or 37.95 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 46 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 46 or 9.79 µg/m³
PM10 = 15 or 16.4 µg/m³
NO₂ = 10 or 11 ppb
SO₂ = 1 or 0.77 ppb
O₃ = 31 or 34.24 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 51 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 51 or 10.31 µg/m³
PM10 = 41 or 43.2 µg/m³
NO₂ = 22 or 18 ppb
SO₂ = 1 or 0.66 ppb
O₃ = 13 or 19.24 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 38 , the dominant pollutant was PM10 and the air quality is super
PM2.5 = 33 or 7.51 µg/m³
PM10 = 38 or 41.2 µg/m³
NO₂ = 28 or 30 ppb
SO₂ = 1 or 0.66 ppb
O₃ = 3 or 3.16 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 24 , the dominant pollutant was PM2.5 and the air quality is unbelievable
PM2.5 = 24 or 5.91 µg/m³
PM10 = 12 or 12.7 µg/m³
NO₂ = 22 or 23 ppb
SO₂ = 1 or 0.71 ppb
O₃ = 6 or 7.25 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 23 , the dominant pollutant was O3 and the air quality is unbelievable
PM2.5 = 15 or 3.39 µg/m³
PM10 = 6 or 6.3 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 0 or 0.35 ppb
O₃ = 23 or 24.51 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 21 , the dominant pollutant was O3 and the air quality is unbelievable
PM2.5 = 18 or 3.01 µg/m³
PM10 = 6 or 6.3 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 0 or 0.4 ppb
O₃ = 21 or 22.94 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 31 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 31 or 2.58 µg/m³
PM10 = 6 or 6.8 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 0 or 0.43 ppb
O₃ = 15 or 16.2 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 78 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 78 or 3.91 µg/m³
PM10 = 6 or 7.4 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 0 or 0.39 ppb
O₃ = 20 or 21.8 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 36 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 36 or 3.99 µg/m³
PM10 = 10 or 10.6 µg/m³
NO₂ = 16 or 17 ppb
SO₂ = 0 or 0.39 ppb
O₃ = 22 or 23.64 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 51 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 51 or 6.31 µg/m³
PM10 = 16 or 16.9 µg/m³
NO₂ = 10 or 11 ppb
SO₂ = 1 or 0.56 ppb
O₃ = 22 or 23.56 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 42 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 42 or 8.39 µg/m³
PM10 = 11 or 12.3 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 1 or 0.73 ppb
O₃ = 22 or 24.41 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 51 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 51 or 6.89 µg/m³
PM10 = 12 or 13.3 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 0 or 0.41 ppb
O₃ = 27 or 28.84 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 52 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 52 or 5.9 µg/m³
PM10 = 17 or 17.7 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 0 or 0.3 ppb
O₃ = 27 or 29.13 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 56 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 56 or 6.84 µg/m³
PM10 = 17 or 14.6 µg/m³
NO₂ = 12 or 6 ppb
SO₂ = 1 or 0.44 ppb
O₃ = 13 or 19.59 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 54 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 54 or 14.18 µg/m³
PM10 = 17 or 18 µg/m³
NO₂ = 13 or 14 ppb
SO₂ = 0 or 0.48 ppb
O₃ = 6 or 6.04 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 54 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 54 or 11.99 µg/m³
PM10 = 17 or 18.1 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 0 or 0.48 ppb
O₃ = 9 or 9.77 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 55 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 55 or 13.83 µg/m³
PM10 = 20 or 21.9 µg/m³
NO₂ = 10 or 11 ppb
SO₂ = 1 or 0.75 ppb
O₃ = 25 or 26.51 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 47 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 47 or 9.41 µg/m³
PM10 = 26 or 27.9 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 1.08 ppb
O₃ = 41 or 43.56 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 44 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 44 or 9.08 µg/m³
PM10 = 19 or 19.7 µg/m³
NO₂ = 4 or 4 ppb
SO₂ = 1 or 1.21 ppb
O₃ = 30 or 32.2 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 45 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 45 or 8.39 µg/m³
PM10 = 14 or 19.3 µg/m³
NO₂ = 11 or 6 ppb
SO₂ = 1 or 0.99 ppb
O₃ = 12 or 20.41 ppb
CO = 3 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 30 , the dominant pollutant was PM2.5 and the air quality is unbelievable
PM2.5 = 30 or 6.43 µg/m³
PM10 = 13 or 14.2 µg/m³
NO₂ = 11 or 12 ppb
SO₂ = 1 or 0.72 ppb
O₃ = 13 or 13.69 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 24 , the dominant pollutant was PM2.5 and the air quality is unbelievable
PM2.5 = 24 or 4.96 µg/m³
PM10 = 11 or 11.7 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 0.73 ppb
O₃ = 22 or 23.54 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 48 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 48 or 9.51 µg/m³
PM10 = 13 or 14 µg/m³
NO₂ = 3 or 3 ppb
SO₂ = 1 or 1.09 ppb
O₃ = 23 or 24.75 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 24 , the dominant pollutant was PM2.5 and the air quality is unbelievable
PM2.5 = 24 or 6.12 µg/m³
PM10 = 8 or 8.7 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 0 or 0.4 ppb
O₃ = 13 or 13.77 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 32 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 32 or 4.43 µg/m³
PM10 = 9 or 10.4 µg/m³
NO₂ = 4 or 4 ppb
SO₂ = 0 or 0.44 ppb
O₃ = 29 or 30.59 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 72 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 72 or 14.87 µg/m³
PM10 = 19 or 20.2 µg/m³
NO₂ = 8 or 8 ppb
SO₂ = 1 or 0.82 ppb
O₃ = 11 or 12.3 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 72 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 72 or 17.45 µg/m³
PM10 = 27 or 28.7 µg/m³
NO₂ = 12 or 13 ppb
SO₂ = 1 or 0.81 ppb
O₃ = 8 or 9.08 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 4 PM the AQI was 108 , the dominant pollutant was PM2.5 and the air quality is unhealthy for sensitive groups
PM2.5 = 108 or 43.28 µg/m³
PM10 = 40 or 43.3 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 3 or 1.72 ppb
O₃ = 15 or 15.57 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 108 , the dominant pollutant was PM2.5 and the air quality is unhealthy for sensitive groups
PM2.5 = 108 or 38.44 µg/m³
PM10 = 35 or 38.4 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 1 or 0.95 ppb
O₃ = 17 or 17.5 ppb
CO = 3 or 0.3 ppb
