SINGAPORE - Hazy conditions on Friday were due to a change in wind direction, and air quality will improve, the National Environment Agency (NEA) said.

"The hazy conditions are due to a change in the prevailing winds blowing from the southwest, and this could have brought in some haze from the fires in central Sumatra," said a spokesman from the Meteorological Service Singapore, a department under NEA.

It added: "The winds are forecast to blow from the south later today and an improvement in the conditions can be expected."

The three-hour Pollutant Standards Index (PSI) readings had peaked at 92 at 2pm, before falling to 84 at 3pm.
By 6pm, it dipped to 69.

A reading from 51 to 100 is in the moderate range whereas 101-200 is considered unhealthy. As at 6pm on Friday, the 24-hour PSI was between 69 to 74, and in the moderate range.