| Contains |
Unit of measure |
Standard |
| CO second highest daily hourly (8-hour) maximum annually |
ppm |
9 ppm |
| CO second highest daily hourly (1-hour) maximum annually |
ppm |
9 ppm |
| lead (Pb) rolling quarterly maximum |
µg/m3 |
.15 µg/m3 |
| NO2 highest annual mean concentration |
ppm |
0.053 ppm |
| O3 fourth highest daily 8-hourly maximum over the ozone season |
ppm |
0.075 ppm |
| PM10 second highest daily hourly (8-hourly) maximum annually |
µg/m3 |
150 µg/m3 |
| PM 2.5 24-hour, 98th percentile (of 24-hour PM2.5 concentrations in a year (averaged over 3 years), at the population-oriented monitoring site with the highest measured values in an area) |
µg/m3 |
15 µg/m3 |
| PM 2.5 weighted annual mean |
µg/m3 |
35 µg/m3 |
| SO2 second highest daily hourly (24-hourly) maximum annually |
ppm |
0.03 ppm |
| SO2 highest arithmetic annual mean concentration |
ppm |
0.14 ppm |
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