Page 15 - Hillingdon SuDS DESIGN & EVALUATION
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3.2  Separating rainwater from foul sewage

      In the mid-twentieth century it was realised                Unfortunately, rainwater still gets into the
      that foul sewage and storm water should be                  foul sewer and misconnections                    Overview
      separated.  A separate sewer arrangement                    contaminate surface water sewers and
      was introduced with the foul sewer for                      receiving watercourses. The SuDS
      human waste and the surface water sewer                     approach to managing rainfall can
      for rainfall. However, in many urban areas                  minimise these misconnections by
      these connections are still unclear and are                 keeping runoff at or near the surface.

      complicated by highway drainage and other
      ad hoc arrangements.























                                                                                                                   10


                                                                                       Separate pipes for foul
                                                                                   sewage and surface water
                                                                                       were introduced in the
                                                                                       mid-twentieth century.





























      London Borough of Hillingdon SuDS D & E Guide                                                  © 2018 McCloy Consulting & Robert Bray Associates
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