The Chartered Institution of Water and Environmental Management (CIWEM) is an independent professional body and a registered charity in the United Kingdom that works internationally to advance the science and practice of water resource management and environmental resource management for sustainability. It is licensed by the Science Council to award Chartered Scientist and Chartered Environmentalist status to qualifying members. It is a member of the Society for the Environment. The organisation was formed in 1987 when the , the , and the merged. It was granted a Royal Charter in 1995.