dnreclogo Delaware Air Quality Monitoring Network
Welcome to the Delaware Air Quality Network's Air Monitoring page.

Here you will find current Air Quality data from monitoring stations throughout the state. To view current data for a station simply click the corresponding diamond on the map to the right. The current monitoring data will display here. Once the current data are displayed click the label in each row to view the past thirty days of data.

Use the tabs above to view station descriptions and photographs of the stations themselves.

Click Air Quality Index Chart to view a legend for each the Index Value.

Click Reports to view or download documentation of previous year’s Ozone Exceedences.
Select a station on map to see discriptions in this tab.
Select a station on map to see photos in this tab.
Value 1 Hr Ozone
(ppm)
8 Hr
Ozone
(ppm)
Carbon
Monoxide
CO
(ppm)
Sulfur
Dioxide
SO2
(ppm)
Nitric
Oxide
NO
ppm)
Nitrogen
Dioxide
NO2
(ppm)
Nitrogen
Oxides
NOx
(ppm)
1 Hr
Particle Matter
PM2.5
(µg/m³)
24 Hr
Particle Matter
PM2.5
(µg/m³)
Good # 0.000 - 0.059 0.0 - 4.4 0.000 - 0.034 # 0 - 0.053 # # 0.0 - 12.0
Moderate # 0.060 - 0.075 4.5 - 9.4 0.035 - 0.144 # 0.054 - 0.1 # # 12.1 - 35.4
Unhealthy for Sensitive Groups 0.125 - 0.164 0.076 - 0.095 9.5 - 12.4 0.145 - 0.224 # 0.101 - 0.360 # # 35.5 - 55.4
Unhealthy 0.165 - 0.204 0.096 - 0.115 12.5 - 15.4 0.225 - 0.304 # 0.361 - 0.640 # # 55.5 - 150.4
Very Unhealthy 0.205 - 0.504 # 15.5 - 40.4 0.305 - 0.804 # 0.65 - 1.64 # # 150.5 - 250.4
Hazardous 0.505 + # 40.5 + 0.805 + # 1.65 + # # 250.5 +

# Scale Not Established

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