SOUTH DAKOTA Department of
Environment & Natural Resources

Protecting South Dakota's Tomorrow...Today!
Joe Foss Building
523 E Capitol
Pierre, SD 57501
Field Offices
Contact Us
SubMenu

Air Quality

Ambient Standards

Ambient Air Quality Standards

Pollutant Standard Unit Comments
Particulate Matter
PM10 - 24 hour 150 ug/m3 Primary and Secondary Standard: Maximum 24-hour average concentration with not more than one expected exceedance per year.
PM2.5 - 24 hour 35 ug/m3 Primary and Secondary Standard: based upon the annual 98th percentile averaged over a three year period.
PM2.5 - Annual 12 ug/m3 Primary and Secondary Standard: Maximum expected annual arithmetic mean averaged over three years.
Sulfur Dioxide
Annual 0.030 ppm Secondary Standard:  0.5 ppm, 3-hour averaging time, not to be exceeded more than once per year.
24 hour 0.14 ppm
1 hour 75 ppb Primary Standard: based upon the annual 99th percentile averaged over a three year period.
Carbon Monoxide
8 hour 9.0 ppm Primary Standard: (10 milligrams per cubic meter of air), maximum 8-hour average concentration not to be exceeded more than once per year.
1 hour 35.0 ppm Primary Standard: (40 milligrams per cubic meter of air), maximum 1-hour average concentration not to be exceeded more than once per year.
Ozone
8 hour
(2015 std)
0.070
ppm Primary and Secondary Standard: Fourth highest maximum 8-hour average concentration averaged over a three year period.
Nitrogen Dioxide
Annual

53

ppb Primary and Secondary Standard: maximum annual arithmetic mean concentration.
1 hour
100
ppb Primary Standard: based upon the annual 98th percentile averaged over a three year period.
Lead
Rolling 3 month average

1.5

ug/m3 Primary and Secondary Standard: annual maximum rolling 3 month average averaged over a three year period.
4oiGIFNEIEJJVCBEZXRlY3Rpb24=