Central Kalimantan
The Indonesian Agency for Meteorology, Climatology and Geophysics, which considers a pollution index over 350 "hazardous", reported on 22 September 2015 that the index in Palangkaraya in Central Kalimantan hit 1,986 and the index for Pontianak in West Kalimantan reached 706. These readings surpassed quintuple and double the official "hazardous" level, respectively. In late September, the province of Central Kalimantan measured a record high of 2,300 on Indonesia's PSI. On 2 October, Central Kalimantan was still experiencing a very high PSI of 1,801, such that firefighting helicopters were unable to water-bomb certain areas due to low visibility.