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 15 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
(2008 std)
0.075
ppm Primary and Secondary Standard: Fourth highest maximum 8-hour average concentration averaged over a three year period.
8 hour
(1997 std)

0.080

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.

AQ Program~

 

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Public Notices

Picture of the Joe Foss Building in Pierre, South Dakota and link for driving directions

SD DENR
Joe Foss Building
523 E. Capitol
Pierre, SD 57501
(605) 773-3151