Extended Data Fig. 3: Continuous PM10 monitoring stations in India.
From: Recent PM2.5 air quality improvements in India benefited from meteorological variation
(a) Location of the 131 non-attainment cities (dots) and other cities with PM10 monitoring (open blue circles) on the topographic map (in meters) over India. Blue indicates where continuous PM10 monitoring is available from the CAAQM/US AirNow networks for at least one year during 2017–2022; black indicates no continuous PM10 monitoring is available from the CAAQM/US AirNow networks during 2017–2022; (b) Time series of annual mean PM10 concentrations in 2017–2022 averaged in non-attainment cities with consecutive PM10 data starting from each year during 2017–2021 (right axis); the left axis represent the ratio relative to 2017, the NCAP baseline; the number of cities with available consecutive PM10 observations up to 2022 (numbers in parenthesis) are shown in different shades of grey; larger dots represent greater number of cities included for averaging; error bars denotes ±one standard error of means across available cities (n=13,17,27,36 for 2018–2021 as reported in parenthesis).
