India, Oct. 14 -- Delhi's clean air streak is headed for a break ahead of Diwali as Centre's Air Quality Early Warning System (EWS) predicts the Air Quality Index to slip into "poor" category this week.

On Tuesday morning, national capital's AQI has already slipped into poor category with a reading of 201.

This is the first instance of "poor" air quality in the national capital since June 11, when Delhi last recorded an AQI of 245.

"Delhi's air quality is very likely to be in the 'poor' category from October 14 till October 16. The outlook for the subsequent six days shows the air quality is likely to be between the 'poor' to 'very poor' category," EWS projections released on Monday said.

Delhi recorded a "moderate" AQI at 169 on Mond...