BEIJING, Oct 18 (Reuters) - China’s September coal output fell from a month ago, as tightened safety inspections curbed production at some major mining regions. China, the world’s biggest coal producer and consumer, produced 334.1 million tonnes of the dirty fuel last month, down from 335.24 million tonnes in August, the National Bureau of Statistics data showed on Monday. September coal output was also 0.9% lower than the same period last year. Output in the first nine months reached 2.93 billion tonnes, up 3.7% from the same period a year earlier. (Reporting by Muyu Xu and Shivani Singh; Editing by Jacqueline Wong) Our Standards: The Thomson Reuters Trust Principles.