Alert | Warning | Emergency | Significant Harm | |
SO2 | 300 ppb | 600 ppb | 800 ppb | 1000 ppb |
24 hr. avg. | 800 [MICRO]g/m3 | 1600 [MICRO]g/m3 | 2100 [MICRO]g/m3 | 2620 [MICRO]g/m3 |
PM-10 24 hr. avg. | 350 [MICRO]g/m3 | 420 [MICRO]g/m3 | 500 [MICRO]g/m3 | 600 [MICRO]g/m3 |
CO | 15 ppm | 30 ppm | 40 ppm | 50 ppm |
8 hr. avg. | 17 mg/m3 3 | 4 mg/m3 | 46 mg/m3 | 57.5 mg/m3 |
4 hr. avg. | 86.3 mg/m3 | |||
75 ppm | ||||
1 hr. avg. | 144 mg/m3 | |||
125 ppm | ||||
NO2 | 150 ppb | 300 ppb | 400 ppb | 500 ppb |
24 hr. avg. | 282 [MICRO]g/m3 | 565 [MICRO]g/m3 | 750 [MICRO]g/m3 | 938 [MICRO]g/m3 |
NO2 | 600 ppb | 1200 ppb | 1600 ppb | 2000 ppb |
1 hr. avg. | 1130 [MICRO]g/m3 | 2260 [MICRO]g/m3 | 3000 [MICRO]g/m3 | 3750 [MICRO]g/m3 |
Ozone | 200 ppb | 400 ppb | 500 ppb | 600 ppb |
2 hr. avg. | 400 [MICRO]g/m3 | 800 [MICRO]g/m3 | 1000 [MICRO]g/m3 | 1200 [MICRO]g/m3 |
Minn. R. agency 167, ch. 7009, AIR POLLUTION EPISODES, pt. 7009.1060
Statutory Authority: MS s 116.07