It is realised that there is a lack of information due to the lack of studies in the area. However, in general the air quality appears to be comparatively clean. This nonetheless does not mean that Brunei Darussalam is free from air pollution. Some studies have indicated a high TSP level.
Wind blown dusts is the most likely sources.
Various factors have contributed to the hazy conditions which has also affected other Southeast Asian countries. As a result of the haze several economic activities, including air and land transport, shipping, construction, tourism and agriculture have been badly affected. The actual amount of economic loss suffered by countries during this environmental disaster has yet to be fully determined. The haze pollution has also affected the health of the people and the long terms health effects, if any, has also yet to be determined. For Brunei Darussalam the haze was at its worst between the 19 th and 23 rd of September 1997 where the recorded visibility in Brunei Darussalam dropped below 300 meters at certain places for short periods of time.