Air quality within safety limits, no further smell complaints: NEA

A mysterious, strong acrid smell and smoke swept across parts of Singapore on Sept 25, 2017. The slightly smoky conditions can be seen in this photo from Toa Payoh Lorong 1 taken at 8.30pm.
A mysterious, strong acrid smell and smoke swept across parts of Singapore on Sept 25, 2017. The slightly smoky conditions can be seen in this photo from Toa Payoh Lorong 1 taken at 8.30pm. PHOTO: LIANHE ZAOBAO

SINGAPORE - Air quality levels across Singapore, including levels of volatile organic compounds, continue to remain within safety limits, the National Environment Agency (NEA) said in a statement on Tuesday (Sept 26), a day after Singaporeans islandwide detected a chemical smell accompanied by a cloud of smoke.

NEA said in its Facebook post at 7.49pm that it has been monitoring air quality levels, including levels of volatile organic compounds (VOCs), across Singapore.

"The levels continue to remain within safety limits and we have not received further smell complaints from residents in Singapore," it said.

It added that checks conducted at industrial plants in the north-eastern parts of Singapore showed that they were operating normally.

Residents in various parts of Singapore, including Sengkang, Yishun, Seletar, Bishan, Ang Mo Kio and Clementi, had reported smelling a petrol-like chemical burning smell that irritated their eyes, noses and throats.

However, NEA and the Singapore Civil Defence Force said that there were no toxic industrial substances in the air and that air quality during the period had been "well within safety limits".

Investigations are ongoing, and NEA said it would continue to monitor the situation closely.

ST understands that the fumes are believed to have come from Johor.

NEA also said in its statement that Singapore "may experience slightly hazy conditions" on Wednesday morning due to the accumulation of particulate matter under light wind conditions.

For the next 24 hours, the 24-hr PSI is forecast to be in the Moderate range.

NEA will continue to closely monitor the situation.