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
Chicago Air Quality Conditions
At 2 PM the AQI was 103 , the dominant pollutant was PM2.5 and the air quality is unhealthy for sensitive groups
PM2.5 = 103 or 37.63 µg/m³
PM10 = 35 or 37.6 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 1 or NA ppb
O₃ = 18 or 19.34 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 97 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 97 or 34.21 µg/m³
PM10 = 31 or 34.2 µg/m³
NO₂ = 9 or 10 ppb
SO₂ = 1 or 1.07 ppb
O₃ = 18 or 19.27 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 77 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 77 or 27.8 µg/m³
PM10 = 26 or 27.8 µg/m³
NO₂ = 9 or 10 ppb
SO₂ = 3 or 2.39 ppb
O₃ = 15 or 16.3 ppb
CO = 6 or 0.5 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 75 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 75 or 19.72 µg/m³
PM10 = 29 or 31.2 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 3 or 1.69 ppb
O₃ = 19 or 20.61 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 82 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 82 or 27.56 µg/m³
PM10 = 28 or 29.9 µg/m³
NO₂ = 14 or 15 ppb
SO₂ = 3 or 1.71 ppb
O₃ = 15 or 16.48 ppb
CO = 3 or NA ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 90 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 90 or 31.35 µg/m³
PM10 = 40 or 42.7 µg/m³
NO₂ = 11 or 12 ppb
SO₂ = 1 or 1.13 ppb
O₃ = 14 or 14.6 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 89 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 89 or 25.48 µg/m³
PM10 = 27 or 28.6 µg/m³
NO₂ = 8 or 9 ppb
SO₂ = 1 or 1.08 ppb
O₃ = 10 or 10.62 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 75 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 75 or 24.71 µg/m³
PM10 = 25 or 26.6 µg/m³
NO₂ = 10 or 11 ppb
SO₂ = 3 or 2.01 ppb
O₃ = 8 or 9.18 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 68 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 68 or 17.49 µg/m³
PM10 = 18 or 19.3 µg/m³
NO₂ = 12 or 13 ppb
SO₂ = 1 or 0.86 ppb
O₃ = 14 or 15.06 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 56 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 56 or 12.48 µg/m³
PM10 = 25 or 26.7 µg/m³
NO₂ = 9 or 10 ppb
SO₂ = 1 or 0.81 ppb
O₃ = 15 or 15.9 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 52 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 52 or 11.44 µg/m³
PM10 = 20 or 22 µg/m³
NO₂ = 20 or 21 ppb
SO₂ = 3 or 1.75 ppb
O₃ = 27 or 29.16 ppb
CO = 2 or 0.2 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 9.64 µg/m³
PM10 = 17 or 17.6 µg/m³
NO₂ = 7 or 7 ppb
SO₂ = 7 or 4.86 ppb
O₃ = 31 or 33.56 ppb
CO = 2 or 0.2 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 10.15 µg/m³
PM10 = 14 or 15.4 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 1.18 ppb
O₃ = 25 or 27.29 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 10.91 µg/m³
PM10 = 16 or 16.6 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 0.88 ppb
O₃ = 27 or 29.26 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 44 , the dominant pollutant was PM2.5 and the air quality is okay
PM2.5 = 44 or 8.87 µg/m³
PM10 = 15 or 15.8 µg/m³
NO₂ = 17 or 18 ppb
SO₂ = 3 or 1.6 ppb
O₃ = 17 or 17.56 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 37 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 15 or 5.7 µg/m³
PM10 = 15 or 16.3 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 1 or 1.41 ppb
O₃ = 37 or 40.27 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 35 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 16 or 4.5 µg/m³
PM10 = 16 or 17.3 µg/m³
NO₂ = 12 or 13 ppb
SO₂ = 1 or 0.79 ppb
O₃ = 35 or 38.09 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 37 , the dominant pollutant was O3 and the air quality is holy
PM2.5 = 13 or 4.04 µg/m³
PM10 = 7 or 7.9 µg/m³
NO₂ = 7 or 7 ppb
SO₂ = 1 or 1.19 ppb
O₃ = 37 or 39.86 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 35 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 16 or 3.92 µg/m³
PM10 = 25 or 27.2 µg/m³
NO₂ = 8 or 8 ppb
SO₂ = 1 or 0.9 ppb
O₃ = 35 or 37.91 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 PM the AQI was 33 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 27 or 5.17 µg/m³
PM10 = 24 or 26.2 µg/m³
NO₂ = 7 or 7 ppb
SO₂ = 1 or 0.65 ppb
O₃ = 33 or 36.09 ppb
CO = 3 or 0.3 ppb
Chicago Air Quality Conditions
At 3 PM the AQI was 32 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 32 or 6.75 µg/m³
PM10 = 18 or 18.6 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 0.73 ppb
O₃ = 32 or 34.98 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 12 PM the AQI was 31 , the dominant pollutant was O3 and the air quality is super
PM2.5 = 27 or 6.37 µg/m³
PM10 = 23 or 24.6 µg/m³
NO₂ = 5 or 5 ppb
SO₂ = 1 or 0.55 ppb
O₃ = 31 or 33.91 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 AM the AQI was 27 , the dominant pollutant was O3 and the air quality is unbelievable
PM2.5 = 22 or 6.19 µg/m³
PM10 = 14 or 14.8 µg/m³
NO₂ = 6 or 6 ppb
SO₂ = 1 or 0.59 ppb
O₃ = 27 or 29.13 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 6 AM the AQI was 32 , the dominant pollutant was PM2.5 and the air quality is super
PM2.5 = 32 or 5.64 µg/m³
PM10 = 22 or 24.4 µg/m³
NO₂ = 20 or 21 ppb
SO₂ = 1 or 1.04 ppb
O₃ = 24 or 25.61 ppb
CO = 2 or 0.2 ppb
Chicago Air Quality Conditions
At 9 PM the AQI was 62 , the dominant pollutant was PM2.5 and the air quality is moderate
PM2.5 = 62 or 12.89 µg/m³
PM10 = 21 or 23 µg/m³
NO₂ = 15 or 16 ppb
SO₂ = 1 or 1.11 ppb
O₃ = 29 or 31.01 ppb
CO = 5 or 0.4 ppb
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 8.68 µg/m³
PM10 = 26 or 27.9 µg/m³
NO₂ = 7 or 7 ppb
SO₂ = 1 or 1.12 ppb
O₃ = 40 or 43.13 ppb
CO = 3 or 0.3 ppb
