Air Quality Data Continuous

Historic and live air quality data from Bristol City Council and Defra. NOx data are from chemiluminescent NOx analysers (API T200). BCC's PM ₁₀ data are from a BAM 1020 instrument and are corrected to gravimetric. PM₁₀ and PM_2.5 data from the AURN site are from a TEOM instrument. PM₁₀ data from Temple Way are from a BAM instrument. Hourly observations are shown. BCC data older than the current month have been ratified and corrected in accordance with UK air quality guidance LAQM TG.16. For the ratifaction of Defra data, please refer to the UK-AIR website. Data from the Defra sites are reproduced under © Crown 2019 copyright Defra via uk-air.defra.gov.uk, licenced under the Open Government Licence (OGL).