In Delhi, it appears to be easy to obtain a pollution under control (PUC) certificate for vehicles, even if they exceed emission limits. An investigation found that four out of five PUC centres did not conduct the necessary checks mandated by the Delhi transport department. The PUC test for diesel vehicles measures smoke density, which should not exceed 0.7 per metre for BS-6 vehicles. The investigation found that many unfit vehicles were passing the test, highlighting gaps in the regulation of PUC centres. The Delhi Traffic Police has issued 158,762 challans to owners of vehicles without PUCs so far this year. | Latest News Delhi