The CIEH Northern Ireland as a campaigning body seeks to influence environmental and public health policy.
Northern Ireland as a devolved region within the United Kingdom (UK) has its own, largely autonomous, policy machinery in the form of the Northern Ireland Assembly.
Therefore one of the roles of the Northern Ireland Directorate is to liaise directly with the Assembly, government departments, local authorities and non-governmental organisations in order to promote improvements in environmental and public health policy in Northern Ireland.
The CIEH actively encourages its members to contribute to consultation documents and CIEH policy development.
The environmental health service for the general public in Northern Ireland operates through the 26 district councils and is responsible for a wide range of statutory health protection functions as well as being involved in heath improvement initiatives.
The Northern Ireland Chief Environmental Health Officers Group (CEHOG) is representative for all 26 councils.