Surface Water Management ReviewRead Report Reducing flood risk through fully integrated sustainable drainage systems Supporting Growth Reducing the causes and impacts of flooding whilst preventing pollution. Find out more Delivering Consistency Providing guidance on design, construction, operation and maintenance. Find out more Making Development Happen Achieving consistency through engagement. Find out more Making Drainage Sustainable Drainage that’s sympathetic, beneficial and enhancing. Find out more Latest newsASA at Flood & Coast 2025, 3rd – 5th June 2025ASA Conference 2024 – Multifunctional SuDS; turning theory into practiceGovernment Response to NIC StudySurface Water Management ReviewSustainable Drainage Systems ReviewASA are looking for volunteers!Upcoming Events Upcoming Events Notice There are no upcoming events.