There are a number of associated societies whose activities relate to water and wastewater engineering.
British Dam Society
BDS enables professionals involved with dams and reservoirs to meet and exchange ideas, views, and experiences on dam-related issues. It promotes best practice in all aspects of the planning, design, construction, maintenance, operation, and safety of dams and reservoirs. BDS holds regular meetings and events and publishes its own journal.
British Hydrological Society
BHS was established to advance hydrology, the amount and quality of water moving and accumulating on the land surface and in the soils and rocks near the surface. Hydrology encompasses water in rivers, lakes, aquifers, and glaciers.
BHS caters for all those with an interest in hydrology and holds meetings and events, publishes papers and a journal, and promotes professional development.
International Commission on Irrigation and Drainage
ICID.UK is the British section of the International Commission on Irrigation and Drainage (ICID). Nationally there is considerable interest in irrigated agriculture, drainage, and flood control and alleviation. Internationally there is a traditional interest in irrigation and drainage, particularly in the developing world. ICID.UK organises events, meetings, publishes a magazine for members, and participates in international conferences and working groups.