Minn. R. agency 167, ch. 7009, AMBIENT AIR QUALITY STANDARDS, pt. 7009.0080
The following table contains the state ambient air quality standards.
Air Pollutant | Level of Primary Standard | Level of Secondary Standard | Averaging Time | Form of the Standard |
Hydrogen Sulfide | 0.05 ppm by volume (70.0 micro-grams per cubic meter) | 30-minutes | 30-minute average not to be exceeded more than two times in a year | |
0.03 ppm by volume (42.0 micro-grams per cubic meter) | 30-minutes | 30-minute average not to be exceeded more than two times in 5 consecutive days | ||
Ozone | 70 ppb by volume ( 137 micrograms per cubic meter) | Same as primary standard | 8-hour | 3-year average of the annual fourth high daily maximum 8-hour concentration does not exceed standard |
Carbon Monoxide | 9 ppm by volume (10 milligrams per cubic meter) | 8-hour | Annual second-high 8-hour concentration does not exceed standard | |
35 ppm by volume (40 milligrams per cubic meter) | 1-hour | Annual second-high 1-hour concentration does not exceed standard | ||
Sulfur Dioxide | 30 ppb by volume ( 79 micro-grams per cubic meter) | Annual average | Annual average concentration does not exceed standard | |
Air Pollutant | Level of Primary Standard | Level of Secondary Standard | Averaging Time | Form of the Standard |
140 ppb ( 367 micrograms per cubic meter) | 24-hour | Annual second-high 24hour concentration does not exceed standard | ||
500 ppb by volume ( 1,310 mi-crograms per cubic meter) | 3-hour | Annual second-high 3-hour concentration does not exceed the standard | ||
75 ppb ( 197 micrograms per cubic meter) | 1-hour | 3-year average of the annual 99th-percentile of daily maximum 1-hour concentrations does not exceed standard | ||
Total Suspended Particulate | 75 micrograms per cubic meter | 60 micrograms per cubic meter | Annual average | Annual geometric mean concentration does not exceed standard |
260 micrograms per cubic meter | 150 micrograms per cubic meter | 24-hour | Annual second-high 24hour concentration does not exceed standard | |
Nitrogen Dioxide | 53 ppb by volume (100 micro-grams per cubic meter) | Same as primary standard | Annual average | Annual average concentration does not exceed standard |
100 ppb by volume (188 micro-grams per cubic meter) | 1-hour | 3-year average of the annual 98th-percentile of daily maximum 1-hour concentrations does not exceed standard | ||
Lead | 0.15 micrograms per cubic meter | Same as primary standard | Rolling 3-month average | Maximum 3-month rolling average from 3 consecutive years does not exceed the standard |
PM-10 | 150 micrograms per cubic meter | Same as primary standard | 24-hour | 3-year average of the annual estimated exceed-ance days is less than or equal to 1 |
PM-2.5 | 35 micrograms per cubic meter | Same as primary standard | 24-hour | 3-year average of the annual 98th-percentile of 24-hour concentrations does not exceed the standard |
12.0 micrograms per cubic meter | 15.0 micrograms per cubic meter | Annual average | 3-year average of the annual seasonally-weighted average does not exceed the standard | |
Minn. R. agency 167, ch. 7009, AMBIENT AIR QUALITY STANDARDS, pt. 7009.0080
Statutory Authority: MS s 116.07