Updated: 09/07/2012 20:46

Singapore registers its worst level of air pollution for the year

®Copyright MediaCorp

Singapore registered its worst level of air pollution for the year today as smoke from forest fires in Indonesia blew over the city-state, triggering a health warning.

As of 8am the Pollutant Standards Index or PSI ranged between 65 and 75 after a night of thick, choking haze over the island.

The air began to clear later in the morning thanks to favourable winds.

A PSI reading of 65-75 is still in the moderate range.

Anything above 100 is considered unhealthy.

According to the National Environment Agency an increase in hotspot activities was observed over Sumatra in Indonesia over the past week.

The agency has advised those with heart or lung disease as well as children and older adults to avoid all physical activity outdoors.