New Delhi, Oct 25 : The air quality in the national capital slightly improved to "moderate" category on Wednesday morning with Air Quality Index (AQI) recorded at 190, according to data from the System of Air Quality and Weather Forecasting And Research (SAFAR). The AQI at Dhirpur was recorded at 300 falling under "poor" category. Notably, the AQI between zero and 50 is considered "good", 51 and 100 "satisfactory", 101 and 200 "moderate", 201 and 300 "poor", 301 and 400 "very poor", and 401 and 500 "severe". In Pusa, the AQI recorded PM 2.5 at 128 "moderate" category. At Lodhi Road, the AQI with PM 2.5 concentration was at 149 under the moderate category and the PM 10 stood at 135 also under the "moderate" category. At IIT Delhi station, the PM 2.5 was at 173, "moderate" category while the PM 10 reached 162, in "moderate" category. The AQI at the city's Mathura Road was under moderate category with PM 2.5 at 152 with PM 10 concentration at 101. According to the forecast from the SAFAR, the air quality of the city will deteriorate further under "poor" category with PM 2.5 reaching 218 and the PM 10 concentration at 167 under "moderate" category on Thursday. The AQI of Delhi's neighbouring cities of Noida stood at 208 and the PM 10 concentration at 218 both under "poor" category, while it was reported at 169 and the PM 10 concentration at 133 under moderate category. /IANS