The Tamil Nadu Pollution Control Board (TNPCB) will add 25 ambient air quality monitoring stations to its network in the State and the data updates will be available online.

MUMBAI: On Thursday morning, humidity levels in the city peaked, hitting 98% in south Mumbai and 80% in the suburbs. Peaked moisture levels have high potential to hold pollutants, say experts.

Firecracker traders may have complained of a slowdown in cracker sales but air pollution levels on Wednesday didn't reflect their concerns by any measure.

The city's air quality deteriorated sharply on Tuesday morning with many residents complaining of a "choking feeling".