THE haze that blanketed Singapore for most of last week cleared up on Sunday, with the Pollution Standards Index reading going as low as 19 in the early morning.

The National Environment Agency (NEA) said the islandwide 24-hour PSI reading was 44 at 4pm in the afternoon, bringing air quality back to the 'Good' range.

An NEA spokesperson said heavy rain in Singapore and Sumatra, including parts of Riau Province and the Straits of Malacca on Saturday (24) had a big part to play in the improved situation on Sunday.

Associate Professor Matthias Roth, who is deputy head of the Department of Geography at the National University of Singapore, said the wind blowing towards Singapore is no longer just from Indonesia, but from other directions as well.

This, he said, could have led to the improvement in the haze situation here over the weekend.

The haze had been attributed to Indonesian farmers from the south Sumatran provinces of Jambi and Riau, who are burning forested areas.

Clearer skies, thanks to rain