Annual Average Concentration of Air Pollutants (in mg/m³) in Assam under National Air Quality Monitoring Programme (NAMP)

Table 1: Summary of SO₂ levels in Guwahati during 2004.

Table 2: Summary of NO₂ levels in Guwahati during 2004.

Table 3: Summary of RSPM levels in Guwahati during 2004.

Table 4: Summary of SPM levels in Guwahati 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