Codes and Standards relevant to district plumbing (see body )

[tj00343]

Hey guys ,
I've been searching for the codes / standards relevant to District plumbing (Road drainage , District Drainage , District water supply systems ) .
Thank You for any help .

 

[pbuk]

In what country?

 

[tj00343]

In Lebanon, but I'm looking for internationally recognized standards

 

[Baluncore]

http://www.cen.eu/cen/pages/default.aspx