Iso 13845 Meaning: Iso 13845 is a standard that outlines the requirements for an organization to establish, maintain and continually improve its environmental management system. It is based on the principles of process-orientation, continual improvement and pollution prevention, and helps organizations to control their environmental impact while meeting regulatory obligations. The standard provides guidance on the documentation, implementation and monitoring of systems that manage interactions with air, water and land, as well as waste and energy resources.