Pavillion is a town in Fremont County, Wyoming, United States. The population was 231 at the 2010 census. In 2008, rural residents five miles east-northeast of Pavillion complained of discolored water, foul smells and illness that they suspected was due to fracking, and the EPA opened an investigation. In 2010, the EPA investigators warned the affected rura…Pavillion is a town in Fremont County, Wyoming, United States. The population was 231 at the 2010 census. In 2008, rural residents five miles east-northeast of Pavillion complained of discolored water, foul smells and illness that they suspected was due to fracking, and the EPA opened an investigation. In 2010, the EPA investigators warned the affected rural residents not to drink their water after finding benzene, naphthalene, phenols, and metals in the water and recommended that the affected rural residents use fans while bathing or washing clothes to avoid the risk of explosion. As of September 2012 testing and discussion about the results was still ongoing. Eventually, in 2016, a study confirmed that chemicals used in fracking impact drinking water that is generated from wells.