The Tianji Coal Chemical Industry Group chemical spill was a severe chemical spill that occurred in Shanxi Province, China during 2012–13. More than 39 tons of anilines leaked from a loose drainage valve at a plant owned by Tianji Coal Chemical Industry Group in the Shanxi city of Changzhi. This chemical spill contaminated the Zhuozhang River which is the source of drinking water for more than one million people, and caused a water crisis in the downstream City of Handan, Hebei Province.