Annual Mean Concentration Range of Ambient Air in Maharashtra (1999) | ||||
(µg/m3) | ||||
Pollution Level | Industrial | Residential | ||
SO2 & NO2 | SPM | SO2 & NO2 | SPM | |
Low (L) | 0-40 | 0-180 | 0-30 | 0-70 |
Moderate (M) | 40-80 | 180-360 | 30-60 | 70-140 |
High (H) | 80-120 | 360-540 | 60-90 | 140-210 |
Critical (C) | >120 | >540 | >90 | >210 |