Minnesota Administrative Rules
Agency 167 - Pollution Control Agency
Chapter 7009 - AMBIENT AIR QUALITY STANDARDS
AMBIENT AIR QUALITY STANDARDS
Part 7009.0080 - MINNESOTA AMBIENT AIR QUALITY STANDARDS
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 |
|
Statutory Authority: MS s 116.07
