The transportation sector is the major contributor to increasing air pollution levels in major cities in India. Various authorities like Road and Transportation Office monitor emission levels. This paper states how using various sensors we can measure emission levels. The data collected is compared to the standards. If it doesn’t meet the standards, the vehicle owner receives an alert and the data is also sent to the RTO for further actions to be taken if needed. Thus monitoring the exhaust for presence and levels of harmful gases emitted, pollution levels can significantly be reduced.