BS ISO 24511:2007

1   Scope This International Standard provides guidelines for the management of wastewater utilities and for the assessment of wastewater services . This International Standard is applicable to publicly and privately owned and operated wastewater utilities, but does not favour any particular ownership or operational model.

    NOTE 1  
      Wastewater  is always generated when water is used or consumed. Accordingly, sources of  wastewater  can be residential, industrial, commercial or institutional. Collected storm water
     or (melted) snow can also be considered as  wastewater , as it often carries contaminants and pathogens picked up from air or ground surfaces
     on its way to a collection system. In certain circumstances, especially in undeveloped
     areas, sanitary waste is collected in an undiluted form. 

This International Standard addresses  wastewater  systems in their entirety and is applicable to systems at any level of development
  (e.g. pit latrines,  on-site systems , networks, treatment facilities). 
The following are within the scope of this International Standard: 

   
      
         

— the definition of a language common to different stakeholders ;

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