Chicago Air Quality Conditions
At 3 PM the AQI was 43 , the dominant pollutant was O3 and the air quality is okay
PM2.5 = 41 or 6.1 µg/m³
PM10 = 10 or 11.4 µg/m³
NO₂ = 2 or 2 ppb
SO₂ = 1 or 0.78 ppb
O₃ = 43 or 45.91 ppb
CO = 2 or 0.2 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 6.1 µg/m³
PM10 = 26 or 18.7 µg/m³
NO₂ = 9 or 6 ppb
SO₂ = 1 or 0.9 ppb
O₃ = 14 or 23.91 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 91 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 91 or 27.81 µg/m³
PM10 = 40 or 43.3 µg/m³
NO₂ = 33 or 35 ppb
SO₂ = 1 or NA ppb
O₃ = 3 or 2.67 ppb
CO = 5 or 0.4 ppb
Chicago Air Quality Conditions
At 8 AM the AQI was 101 , the dominant pollutant was PM2.5 and the air quality is unhealthy for sensitive groups
PM2.5 = 101 or 37.66 µg/m³
PM10 = 35 or 37.7 µg/m³
NO₂ = 32 or 34 ppb
SO₂ = 1 or 1.14 ppb
O₃ = 2 or 1.79 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 101 , the dominant pollutant was PM2.5 and the air quality is unhealthy for sensitive groups
PM2.5 = 101 or 33.13 µg/m³
PM10 = 37 or 40.3 µg/m³
NO₂ = 27 or 29 ppb
SO₂ = 3 or 1.76 ppb
O₃ = 4 or 4.28 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 64 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 64 or 8.16 µg/m³
PM10 = 39 or 42.1 µg/m³
NO₂ = 1 or 1 ppb
SO₂ = 0 or 0.48 ppb
O₃ = 51 or 54.93 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 67 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 67 or 14.52 µg/m³
PM10 = 18 or 19.4 µg/m³
NO₂ = 2 or 2 ppb
SO₂ = 1 or 0.62 ppb
O₃ = 49 or 52.75 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 65 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 65 or 14.24 µg/m³
PM10 = 35 or 38.4 µg/m³
NO₂ = 7 or 7 ppb
SO₂ = 1 or 0.78 ppb
O₃ = 38 or 41.29 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 55 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 55 or 12.25 µg/m³
PM10 = 19 or 21.1 µg/m³
NO₂ = 12 or 13 ppb
SO₂ = 1 or 0.62 ppb
O₃ = 34 or 36.76 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 48 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 48 or 5.37 µg/m³
PM10 = 19 or 21.4 µg/m³
NO₂ = 17 or 18 ppb
SO₂ = 1 or 0.63 ppb
O₃ = 20 or 21.66 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 57 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 57 or 6.08 µg/m³
PM10 = 26 or 27.5 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 1.23 ppb
O₃ = 45 or 49.1 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 49 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 49 or 5.41 µg/m³
PM10 = 21 or 23.5 µg/m³
NO₂ = 2 or 2 ppb
SO₂ = 1 or NA ppb
O₃ = 45 or 48.58 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 53 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 53 or 5.74 µg/m³
PM10 = 19 or 20 µg/m³
NO₂ = 3 or 3 ppb
SO₂ = 1 or 1.09 ppb
O₃ = 47 or 51.32 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 52 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 52 or 6.4 µg/m³
PM10 = 16 or 16.7 µg/m³
NO₂ = 5 or 3 ppb
SO₂ = 1 or 1.22 ppb
O₃ = 28 or 36.08 ppb
CO = 3 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 48 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 48 or 7.39 µg/m³
PM10 = 13 or 13.9 µg/m³
NO₂ = 18 or 19 ppb
SO₂ = 1 or 0.76 ppb
O₃ = 26 or 27.79 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 35 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 35 or 6.7 µg/m³
PM10 = 16 or 16.8 µg/m³
NO₂ = 4 or 4 ppb
SO₂ = 1 or 0.79 ppb
O₃ = 35 or 37.61 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 40 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 34 or 6.48 µg/m³
PM10 = 7 or 8.3 µg/m³
NO₂ = 4 or 4 ppb
SO₂ = 1 or 0.7 ppb
O₃ = 40 or 42.56 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 42 , the dominant pollutant was O3 and the air quality is okay
PM2.5 = 33 or 6.15 µg/m³
PM10 = 18 or 18.8 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 1 or 0.83 ppb
O₃ = 42 or 45.46 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 36 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 33 or 7.32 µg/m³
PM10 = 9 or 10.4 µg/m³
NO₂ = 0 or 0 ppb
SO₂ = 1 or 1.18 ppb
O₃ = 36 or 39.28 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 35 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 35 or 6.12 µg/m³
PM10 = 6 or 6.1 µg/m³
NO₂ = 6 or 1 ppb
SO₂ = 1 or 2.13 ppb
O₃ = 31 or 34.7 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 52 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 52 or 4.73 µg/m³
PM10 = 8 or 8.9 µg/m³
NO₂ = 19 or 20 ppb
SO₂ = 1 or 1.09 ppb
O₃ = 13 or 14.35 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 46 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 46 or 6.43 µg/m³
PM10 = 13 or 13.9 µg/m³
NO₂ = 20 or 21 ppb
SO₂ = 1 or 0.73 ppb
O₃ = 7 or 8.33 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 42 , the dominant pollutant was O3 and the air quality is okay
PM2.5 = 25 or 5.6 µg/m³
PM10 = 17 or 17.5 µg/m³
NO₂ = 1 or 1 ppb
SO₂ = 1 or 0.59 ppb
O₃ = 42 or 45.27 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 42 , the dominant pollutant was O3 and the air quality is okay
PM2.5 = 27 or 4.81 µg/m³
PM10 = 6 or 5.6 µg/m³
NO₂ = 1 or 1 ppb
SO₂ = 0 or 0.45 ppb
O₃ = 42 or 44.89 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 42 , the dominant pollutant was O3 and the air quality is okay
PM2.5 = 28 or 4.35 µg/m³
PM10 = 7 or 7.6 µg/m³
NO₂ = 1 or 1 ppb
SO₂ = 0 or 0.45 ppb
O₃ = 42 or 44.73 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 53 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 53 or 4.95 µg/m³
PM10 = 8 or 9.2 µg/m³
NO₂ = 3 or 3 ppb
SO₂ = 1 or 0.83 ppb
O₃ = 26 or 27.87 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 96 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 96 or 4.94 µg/m³
PM10 = 8 or 9.3 µg/m³
NO₂ = 15 or 16 ppb
SO₂ = 1 or 0.62 ppb
O₃ = 16 or 16.57 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 34 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 34 or 4.46 µg/m³
PM10 = 12 or 12.6 µg/m³
NO₂ = 11 or 12 ppb
SO₂ = 1 or 0.53 ppb
O₃ = 21 or 22.89 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 40 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 23 or 4.97 µg/m³
PM10 = 7 or 8 µg/m³
NO₂ = 3 or 3 ppb
SO₂ = 0 or 0.4 ppb
O₃ = 40 or 42.89 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 36 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 23 or 4.28 µg/m³
PM10 = 6 or 7.2 µg/m³
NO₂ = 2 or 2 ppb
SO₂ = 0 or 0.3 ppb
O₃ = 36 or 39.05 ppb
CO = 2 or 0.2 ppb