Key Messages

Low-cost sensors (LCSs) have revolutionized the air pollution monitoring landscape. However, the sensitivities of particulate matter (PM) LCS measurements to various particle microphysical properties and meteorological aspects warrant an accuracy investigation. We investigated the inter- and intracity variations in the accuracy of LCS-measured PM2.5 across geographically and demographically distinct Indian cities. The collocation data of PM2.5 (collected during March–April 2022) from an LCS (Atmos) and a reference-grade instrument (β attenuation monitor) from nine sites (across five cities) were analyzed.

Ajay Bhargav R, Naveen Puttaswamy, Adithi R Upadhya, Sofiya Rao, Ronak Sutaria, Suman Mor, Sagnik Dey, Ravindra Khaiwal, Kalpana Balakrishnan, and Sachchida Nand Tripathi are the co-authors of this paper.

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