AMBIENT AIR QUALITY DATA
YEAR - 2004
Annual Average Concentration of Air Pollutants (in mg/m3 ) in Uttaranchal under National Air Quality Monitoring Programme (NAMP)
Table 1: Ambient Air Quality at Clock Tower (Residential Area), Dehradun during 2004.
Note:- R – Residential and other areas, I – Industrial area, Std deviation – Standard deviation,
n – number of days monitored for 16 and more hours a day
L- Low, M- Moderate, H – High and C – Critical levels of pollution based on exceedence factor