National Environment Agency CSV archive of historical regional 24-hour Pollutant Standards Index readings for Singapore from 2014 through 2020. The Historical 24-hr PSI dataset supports haze and air-quality retrospective analysis, public health research, and comparison with later NEA air-quality releases. Environmental scientists and journalists can study past PSI patterns across Singapore regions.
National Environment Agency historical CSV of Singapore’s regional 24-hour Pollutant Standards Index from April 2014 through May 2026. Columns cover North, South, East, West, and Central readings alongside the 24-hour PSI series. Environmental researchers and haze analysts reconstruct daily air-quality episodes across the island’s monitoring regions.