The Dacorum Environmental Forum (DEF) was re-established on the 25 November 1993 as a partnership initiative between Dacorum Borough Council and the Community. The principal aims of the Forum are to:
•Promote dialogue on environmental issues.
•Promote wider community involvement in and awareness of environmental protection.
•Work towards the development and implementation of a Local Agenda 21 Strategy (Community Plan) for the Borough.

In the years since its launch the DEF has undergone a number of fundamental changes. In January 2008 it became an affiliate group of the Dacorum Partnership along with groups focused on Police, Health, Housing, Social and related issues, becoming the leader of the theme ‘Creating a Cleaner and Healthier Environment’. DEF developed an action plan which was endorsed by the Dacorum Partnership Board. However In December 2011, after consultation with the partners represented on the Board, it was decided to fold the Dacorum Partnership Board and to move forward with the Destination Dacorum Board which would not include representatives from DEF.

In addition the environmental debate at local, national and international level has further developed. A new set of objectives and Terms of Reference for the DEF has been developed to reflect these changes and developments, and to assist the DEF in its continuing work to protect and improve the state of the environment for the Borough of Dacorum and its citizens.