Hourly Air Quality Forecast - AQI (US EPA)
Good air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
9.19 µg/m³
- PM10:
11.45 µg/m³
- O3:
0.036 ppm
- NO2:
6.8 ppb
- SO2:
0.8 ppb
- CO:
0.21 ppm
Health Recommendations:
Air quality is considered satisfactory, and air pollution poses little or no risk.
Good air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
9.26 µg/m³
- PM10:
11.46 µg/m³
- O3:
0.036 ppm
- NO2:
6.7 ppb
- SO2:
0.8 ppb
- CO:
0.21 ppm
Health Recommendations:
Air quality is considered satisfactory, and air pollution poses little or no risk.
Good air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
9.37 µg/m³
- PM10:
11.48 µg/m³
- O3:
0.036 ppm
- NO2:
6.7 ppb
- SO2:
1 ppb
- CO:
0.21 ppm
Health Recommendations:
Air quality is considered satisfactory, and air pollution poses little or no risk.
Good air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
9.83 µg/m³
- PM10:
11.86 µg/m³
- O3:
0.036 ppm
- NO2:
6.9 ppb
- SO2:
1.2 ppb
- CO:
0.21 ppm
Health Recommendations:
Air quality is considered satisfactory, and air pollution poses little or no risk.
Good air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
10.79 µg/m³
- PM10:
12.91 µg/m³
- O3:
0.036 ppm
- NO2:
8 ppb
- SO2:
1.5 ppb
- CO:
0.22 ppm
Health Recommendations:
Air quality is considered satisfactory, and air pollution poses little or no risk.
Good air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
11.76 µg/m³
- PM10:
14.1 µg/m³
- O3:
0.036 ppm
- NO2:
10.5 ppb
- SO2:
1.7 ppb
- CO:
0.23 ppm
Health Recommendations:
Air quality is considered satisfactory, and air pollution poses little or no risk.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
12.42 µg/m³
- PM10:
15.13 µg/m³
- O3:
0.036 ppm
- NO2:
12.1 ppb
- SO2:
1.8 ppb
- CO:
0.25 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
13.19 µg/m³
- PM10:
16.25 µg/m³
- O3:
0.038 ppm
- NO2:
11.4 ppb
- SO2:
1.8 ppb
- CO:
0.26 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
14.62 µg/m³
- PM10:
17.8 µg/m³
- O3:
0.041 ppm
- NO2:
10.8 ppb
- SO2:
1.9 ppb
- CO:
0.26 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
18.02 µg/m³
- PM10:
21.56 µg/m³
- O3:
0.043 ppm
- NO2:
11.3 ppb
- SO2:
1.8 ppb
- CO:
0.27 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
22.32 µg/m³
- PM10:
26.22 µg/m³
- O3:
0.044 ppm
- NO2:
12.2 ppb
- SO2:
1.8 ppb
- CO:
0.28 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
26.08 µg/m³
- PM10:
30.23 µg/m³
- O3:
0.044 ppm
- NO2:
15.2 ppb
- SO2:
1.9 ppb
- CO:
0.30 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
27.59 µg/m³
- PM10:
31.72 µg/m³
- O3:
0.043 ppm
- NO2:
16.9 ppb
- SO2:
1.9 ppb
- CO:
0.31 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
27.52 µg/m³
- PM10:
31.49 µg/m³
- O3:
0.041 ppm
- NO2:
18.6 ppb
- SO2:
1.9 ppb
- CO:
0.31 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
27.67 µg/m³
- PM10:
31.67 µg/m³
- O3:
0.037 ppm
- NO2:
21.6 ppb
- SO2:
1.6 ppb
- CO:
0.32 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
29.53 µg/m³
- PM10:
33.89 µg/m³
- O3:
0.029 ppm
- NO2:
27.1 ppb
- SO2:
1.2 ppb
- CO:
0.37 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Moderate air quality
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
32.89 µg/m³
- PM10:
37.7 µg/m³
- O3:
0.023 ppm
- NO2:
31.7 ppb
- SO2:
1.1 ppb
- CO:
0.41 ppm
Health Recommendations:
Air quality is acceptable; some pollutants may pose a risk for a small number of unusually sensitive people.
Unhealthy air quality for sensitive groups
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
36.94 µg/m³
- PM10:
42.26 µg/m³
- O3:
0.019 ppm
- NO2:
35.1 ppb
- SO2:
1.1 ppb
- CO:
0.46 ppm
Health Recommendations:
Members of sensitive groups may experience health effects. The general public is less likely to be affected.
Unhealthy air quality for sensitive groups
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
42.17 µg/m³
- PM10:
48.12 µg/m³
- O3:
0.016 ppm
- NO2:
37.9 ppb
- SO2:
1.2 ppb
- CO:
0.50 ppm
Health Recommendations:
Members of sensitive groups may experience health effects. The general public is less likely to be affected.
Unhealthy air quality for sensitive groups
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
49.1 µg/m³
- PM10:
56.11 µg/m³
- O3:
0.013 ppm
- NO2:
41.7 ppb
- SO2:
1.2 ppb
- CO:
0.57 ppm
Health Recommendations:
Members of sensitive groups may experience health effects. The general public is less likely to be affected.
Unhealthy air quality for sensitive groups
Dominant pollutant:
PM2.5
Details
Pollutant Concentrations:
- PM2.5:
55.34 µg/m³
- PM10:
63.3 µg/m³
- O3:
0.010 ppm
- NO2:
46.1 ppb
- SO2:
1.3 ppb
- CO:
0.64 ppm
Health Recommendations:
Members of sensitive groups may experience health effects. The general public is less likely to be affected.
Weather Alerts and Warnings for Norwalk
Moderate
Expected
Observed
Special Weather Statement
Special Weather Statement issued February 25 at 11:52PM EST by NWS Upton NY
Feb 25, 11:52 PM
→ Feb 26, 3:00 AM
Showers are currently moving through southern CT. This
precipitation is falling as freezing rain in some locations where
surface temperatures have dropped below freezing. A glaze of ice
is possible which could cause slick conditions.
Use caution if traveling tonight and leave extra room between you
and the car in front of you.
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