India, Oct. 26 -- Even as high pollution levels and the heavy fog obscuring the sky have raised concerns and exacerbated health issues in citizens, an investigation by anti-noise pollution activist Sumaira Abdulali has found that many of the air quality monitoring boards put up at construction sites are at complete variance with the findings of the Central Pollution Control Board's SAMEER app. For instance, a few of the pollution monitors were found to even display zero pollutants on the day that the SAMEER app showed a higher presence of PM2.5 and PM 10, thus raising questions about the functioning and the very purpose of these boards.

Currently, there are around 3,200 construction sites in the city, of which the air pollution sensors o...