air monitoring station

in atmospheric chemistry
https://doi.org/10.1351/goldbook.A00193
A site at which monitoring of the concentration of one or more pollutants is carried out (e.g. the BAPMoN stations, Background Air Pollution Monitoring Network of the WMO, World Meteorological Organization).
Source:
PAC, 1990, 62, 2167. 'Glossary of atmospheric chemistry terms (Recommendations 1990)' on page 2172 (https://doi.org/10.1351/pac199062112167)