Air Quality in Schools Located Along the National Highway in Jhansi City

Abstract

The outdoor and indoor SO₂ and NO₂ concentrations were measured in seven schools located along the section of National Highway passing through Jhansi city. The results showed both spatial and temporal variation of these gases in the schools.  The levels of pollution were recorded higher in the morning compared to afternoon.  Outdoor concentrations were found to be consistently higher compared to the indoor concentrations.  However, the concentrations of the two gases were well within the prescribed safe limits. A positive and significant (SO₂, R₂ = 0.607; NO₂, R₂ = 0.612) correlations between outdoor and indoor concentrations were established for both the gases. There was a significant (R₂ = 0.697) positive correlation between the concentration of SO₂ and NO₂ in the air.