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In a bid to measure the dominant pollutants in Delhi’s toxic air, authorities in the national capital plan to have around 20 monitoring stations that will exclusively measure the levels of ultrafine particulates, PM 2.5 and PM 10. These stations, to be set up by the Delhi government, will differ from the existing monitoring centres of Delhi Pollution Control Committee (DPCC) and Central Pollution Control Board (CPCB) which also measure the levels of ozone, sulphur dioxide and nitrogen dioxide among others. “The government plans to set up 20 monitoring stations across the megapolis that will only measure PM 2.5 and PM 10. These will be over and above the full-fledged stations already functioning and the proposed ones,” an environment department official said. But the sluggish pace in implementing related promises made in the 2016-17 state budget, like that of setting up three more fixed stations and deploying one mobile monitoring van, does not inspire much confidence on the latest proposal.