HEP reports about its impacts on the environment and the activities it conducts, in order to stop and prevent those impacts, in the Annual Report in the paragraph about sustainable development.

In the period between 2001 and 2006 HEP published a separate, biennial report, HEP and environment.

During 2014 HEP began a pilot project of making a sustainability report for 2013 and 2014, in which it reported about its influence on economy, society and environment. The basis of sustainability report was the Directive on disclosure of nonfinancial and diversity information by certain large companies and groups, which prescribed big companies to report as of 1 January 2017.

The pilot of sustainability report was made by HEP according to core option of the fourth generation of guidelines (G 4) Global Reporting Initiative.