Graded Response Action Plan, a four-stage framework, kicks in as Delhi’s air quality worsens. It is implemented after the AQI reaches ‘poor’ levels.
GRAP uses short-term measures that are revoked once the national capital’s air quality improves.
India’s Commission for Air Quality Management oversees the GRAP framework in the national capital. It collaborates with other environmental bodies.
As Delhi’s AQI crosses the 200 mark, the GRAP restricts construction and demolition activities. Sprinkling water on streets is also done frequently.
Next step is to increase parking fees in public areas and restrict the use of diesel engines in Delhi. This kicks in after the AQI crosses 300.
Harsher measures begin as entry of certain non-essential commercial vehicles registered outside Delhi is restricted. AQI is over 400 at this stage.
As Delhi’s AQI crosses 450, schools may announce temporary closure. Government offices are also directed to run at limited capacity.