The air quality in the city recorded the worst levels on the pollution index this season on Friday, gradually inching towards the 'severe' category. The Central Pollution Control Board (CPCB) recorded the overall Air Quality Index of Delhi at 361 this morning, which falls in the 'very poor' category. Stringent measures, including minimisation of private vehicles, haltinga l construction and shutting down of coal and biomass industries between November 1 and 10, are the measures recommended by the CPCB-led task force to deal with the alarming increase of pollution in the national capital.