Education & Advice - Background

The SuDS Treatment Train

The SuDS treatment train uses a logical sequence of SuDS facilities.  This allows run-off to pass through several different SuDS before reaching the receiving watercourse or water bodies.  By using the treatment train, run-off will encounter different passive treatment processes that are active in different types of facilities.

The treatment train comprises four stages:

  1. Prevention
  2. Source control
  3. Site control
  4. Regional control

Water is conveyed between each stage by a variety of techniques, such as swales, linear wetlands (which can also provide retention and water quality benefits) or pipes.

Cyfoeth Naturiol Cymru / Natural Resources Wales Welsh Water / Dwr Cymru Welsh Government / Llywodraeth Cymru Atkins Welsh Local Government Association Consumer Council for Water
Home Builders Federation CIWEM Institute of Civil Engineers