Noonmati (Assamese: নুনমাটি) is located in Guwahati, Assam (in North East India).Noonmati, a suburb of the city of Guwahati, Assam, India is known for the first oil refinery to be commissioned by the then Indian Oil Company Limited, now known as Indian Oil Corporation Limited, listed as one of the fortune 500 companies. Guwahati Refinery as is known was started on January 1, 1962. Noonmati Refinery is supplied by crude oil from the pipeline of Oil India Ltd.