India, Oct. 25 -- With winter approaching, Lucknow's air quality is showing signs of deterioration, with the city recording just one 'good' air day so far in October, while pollution levels at one monitoring station have already crossed into the 'poor' category.

Of the 24 days recorded this month until October 24, the city experienced one day with 'good' air quality, 12 days in the 'satisfactory' category and 11 days with 'moderate' air quality. The trend marks a shift from September, when air quality remained largely in the good and satisfactory categories, according to data.

The city's PM2.5 concentration was recorded at 144 on October 24, reflecting elevated particulate pollution.

Data from six monitoring stations showed that Kendri...