This article was developed with the objective of analyzing the use of compulsory environmental audits as a tool to evaluate the environmental performance of a chemical industry. The research method used consisted of the analysis of reports of environmental audits carried out from 2011 to 2014, in the light of Directive 056 - Rev3. It can be concluded that the audit helped the company, improving its environmental performance, since there was a reduction in the number of nonconformities, a decrease in energy and water expenditure and optimization of the processes through the improvement opportunities detected.