New Delhi, Feb. 6 -- The air quality in Delhi improved slightly on Friday morning, with the overall Air Quality Index (AQI) recorded at 226 at 8 AM, remaining in the poor category, according to Central Pollution Control Board (CPCB) data.

While the air quality improved from Thursday, when it was recorded at 241, several areas of the national capital remained in the 'poor' category and were blanketed by a thin layer of fog this morning.

According to CPCB data, areas including Anand Vihar (261). Ashok Vihar (259), Chandani Chowk (240), Dwarka Sector 8 (273), RK Puram (271), and Okhla Phase 2 (262) remained in the 'poor' category.

Furthermore, DTU (228), Bawana (266), Sonia Vihar (262), Rohini (268), and Shadipur (280) also remained in th...