Particulate matter in up to13 size fractions was collected in up to 72 hour samples from a 5th floor window in Lak Si, Bangkok, Thailand; and from Pollution Control Department (PCD) sites in Ayutthaya, Bang Phli and Chok Chai, in or near Bangkok using a Dekati Electrical Low Pressure Impactor Classic (ELPI). Samples were weighed and analysed for concentrations of the following elements: Mg, Al, V, Cr, Mn, Fe, Co, Ni, Cu. Zn, As, Se, Mo, Cd, Sb, Ba and Pb. The data covered three seasons in Bangkok, hot, cool and rainy, from February 2018 until December 2018. Measurements were taken by the staff of the Toxicology group in the Chulabhorn Research Institute, Thailand and the Atmospheric Chemistry Research Group in the University of Bristol, UK, with the assistance of the PCD, Bangkok, at their sites.

This dataset contains PM10 concentration and composition measurements taken in Lak Si, Bangkok, Thailand. Particulate matter under 10 micrometres diametre in size (PM10) was collected in 24 hour and 72 hour samples in a rooftop site in Lak Si, Bangkok, Thailand using a Sven Leckel LVS3 PM10 sampler. Samples were weighed and analysed for concentrations of the following elements: Mg, Al, Ca, V, Cr, Mn, Fe, Co, Ni, Cu. Zn, As, Se, Mo, Cd, Sb, Ba and Pb. The data covered three seasons in Bangkok, hot, cool and rainy, from 5th March 2018 until 15th November 2018. Meteorological data was measured in the same location using a Gill Maximet 501 and Gill Maximet 100 weather station. Weather parameters measured included rainfall, wind speed, wind direction, pressure, relative humidity, temperature, dew point and solar radiation. Measurements were taken by the staff of the Toxicology group in the Chulabhorn Research Institute, Thailand and the Atmospheric Chemistry Research Group in the University of Bristol, UK as part of the NERC grant Ultrafine and Submicron Particles in the Urban Environment in Thailand.