KUALA LUMPUR (Dec 23): Pengurusan Air Selangor Sdn Bhd (Air Selangor) is unable to resume operations of the water treatment plants at Sungai Semenyih and Bukit Tampoi until the odour pollution reading in Sungai Semenyih reaches 0 tonne level.

Air Selangor said that as of yesterday's (Dec 22) 11 am reading the pollution level had dropped to one tonne, and it expects it to drop to 0 tonne in the event of heavy rain in the afternoon that is expected to speed up the dilution process and reduce the odour pollution.