Humidity: 88%
Wind: 5 mph
UV Index: 0
Humidity: 92%
Wind: 5 mph
UV Index: 0
Humidity: 94%
Wind: 5 mph
UV Index: 0
Humidity: 96%
Wind: 5 mph
UV Index: 0
Humidity: 98%
Wind: 5 mph
UV Index: 1
Humidity: 87%
Wind: 5 mph
UV Index: 11
Humidity: 72%
Wind: 6 mph
UV Index: 20
Humidity: 59%
Wind: 6 mph
UV Index: 31
Humidity: 51%
Wind: 6 mph
UV Index: 43
Humidity: 44%
Wind: 6 mph
UV Index: 52
Humidity: 39%
Wind: 7 mph
UV Index: 58
Humidity: 35%
Wind: 7 mph
UV Index: 52
Humidity: 32%
Wind: 7 mph
UV Index: 43
Humidity: 33%
Wind: 7 mph
UV Index: 31
Humidity: 33%
Wind: 7 mph
UV Index: 20
Humidity: 34%
Wind: 7 mph
UV Index: 11
Humidity: 39%
Wind: 7 mph
UV Index: 1
Humidity: 44%
Wind: 6 mph
UV Index: 0
Humidity: 49%
Wind: 6 mph
UV Index: 0
Humidity: 54%
Wind: 6 mph
UV Index: 0
Humidity: 60%
Wind: 5 mph
UV Index: 0
Hourly Air Quality Forecast - AQI (US EPA)
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
14.25
µg/m³
- PM10:
14.53
µg/m³
- O₃:
37.06
ppb
- NO₂:
7.57
ppb
- SO₂:
4.12
ppb
- CO:
228.14
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
13.99
µg/m³
- PM10:
14.26
µg/m³
- O₃:
36.33
ppb
- NO₂:
6.99
ppb
- SO₂:
4.32
ppb
- CO:
219.10
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
13.92
µg/m³
- PM10:
14.20
µg/m³
- O₃:
32.97
ppb
- NO₂:
8.50
ppb
- SO₂:
4.13
ppb
- CO:
227.72
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
14.04
µg/m³
- PM10:
14.32
µg/m³
- O₃:
29.60
ppb
- NO₂:
10.02
ppb
- SO₂:
3.94
ppb
- CO:
236.34
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
14.39
µg/m³
- PM10:
14.65
µg/m³
- O₃:
26.24
ppb
- NO₂:
11.53
ppb
- SO₂:
3.75
ppb
- CO:
244.96
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
14.75
µg/m³
- PM10:
14.97
µg/m³
- O₃:
36.05
ppb
- NO₂:
9.47
ppb
- SO₂:
4.02
ppb
- CO:
243.74
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
13.63
µg/m³
- PM10:
13.86
µg/m³
- O₃:
45.86
ppb
- NO₂:
7.41
ppb
- SO₂:
4.30
ppb
- CO:
242.51
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
14.04
µg/m³
- PM10:
14.31
µg/m³
- O₃:
55.67
ppb
- NO₂:
5.35
ppb
- SO₂:
4.57
ppb
- CO:
241.28
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
14.24
µg/m³
- PM10:
14.60
µg/m³
- O₃:
62.89
ppb
- NO₂:
3.90
ppb
- SO₂:
3.90
ppb
- CO:
219.05
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
12.44
µg/m³
- PM10:
12.83
µg/m³
- O₃:
70.12
ppb
- NO₂:
2.46
ppb
- SO₂:
3.23
ppb
- CO:
196.81
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
11.19
µg/m³
- PM10:
11.59
µg/m³
- O₃:
77.34
ppb
- NO₂:
1.01
ppb
- SO₂:
2.56
ppb
- CO:
174.57
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: pm25
Details
Pollutant Concentrations:
- PM2.5:
10.76
µg/m³
- PM10:
11.14
µg/m³
- O₃:
77.80
ppb
- NO₂:
1.04
ppb
- SO₂:
2.36
ppb
- CO:
172.49
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: o3
Details
Pollutant Concentrations:
- PM2.5:
10.53
µg/m³
- PM10:
10.93
µg/m³
- O₃:
78.26
ppb
- NO₂:
1.08
ppb
- SO₂:
2.17
ppb
- CO:
170.41
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Moderate air quality
Dominant pollutant: o3
Details
Pollutant Concentrations:
- PM2.5:
10.40
µg/m³
- PM10:
10.80
µg/m³
- O₃:
78.72
ppb
- NO₂:
1.11
ppb
- SO₂:
1.98
ppb
- CO:
168.33
ppb
Health Recommendations:
Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.
Unhealthy air quality for sensitive groups
Dominant pollutant: o3
Details
Pollutant Concentrations:
- PM2.5:
10.35
µg/m³
- PM10:
10.74
µg/m³
- O₃:
74.39
ppb
- NO₂:
2.71
ppb
- SO₂:
1.97
ppb
- CO:
181.57
ppb
Health Recommendations:
Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.
Unhealthy air quality for sensitive groups
Dominant pollutant: o3
Details
Pollutant Concentrations:
- PM2.5:
10.46
µg/m³
- PM10:
10.83
µg/m³
- O₃:
70.05
ppb
- NO₂:
4.30
ppb
- SO₂:
1.95
ppb
- CO:
194.82
ppb
Health Recommendations:
Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.
Unhealthy air quality for sensitive groups
Dominant pollutant: o3
Details
Pollutant Concentrations:
- PM2.5:
11.84
µg/m³
- PM10:
12.15
µg/m³
- O₃:
65.71
ppb
- NO₂:
5.90
ppb
- SO₂:
1.94
ppb
- CO:
208.07
ppb
Health Recommendations:
Air quality may be unhealthy for sensitive groups. The general public is not likely to be affected.
Weather Alerts and Warnings for St. Louis
Air Quality Alert
Air Quality Alert issued September 15 at 1:53PM CDT by NWS St Louis MO
Sep 15, 1:53 PM
→ Sep 16, 2:00 PM
The St. Louis Clean Air Partnership has issued an air quality alert
for the St. Louis metropolitan area until 8 PM CDT this evening.
An Orange air quality forecast means that maximum ozone
concentrations are expected to reach levels that pose a health risk.
Adverse health effects increase as air quality deteriorates. Ground-
level ozone is an air contaminant which can cause breathing
difficulties for children, older adults, as well as persons with
respiratory problems.
Reducing outdoor physical activity is recommended. If it is a
regularly scheduled work day you are urged to consider
telecommuting, carpooling, or utilizing public transit. Avoid
excessive idling and do not top off when refueling motor vehicles.
The use of gasoline-powered lawn equipment should be reduced or
postponed until late in the day.
For more information visit the St. Louis Clean Air Partnership at
http://cleanair-stlouis.com/
For current Air Quality Index (AQI) values visit
https://www.airnow.gov/