Normativity

NOM – 001 – SEMARNAT-1996: Mexican Official Norm that establishes the maximum levels of contaminants in wastewater to national ground.
http://biblioteca.semarnat.gob.mx/janium/Documentos/Ciga/agenda/DOFsr/DO2776.pdf
 
NOM – 002 – SEMARNAT– 1996: Mexican Official Norm that establishes the maximum levels of contaminants in wastewater to urban and municipal sewage systems.
http://biblioteca.semarnat.gob.mx/janium/Documentos/Ciga/agenda/DOFsr/ECOL002.pdf
 
NOM – 003 – SEMARNAT– 1997: Mexican Official Norm that establishes the maximum levels of contaminants in treated wastewater that is reused in public services.
http://biblioteca.semarnat.gob.mx/janium/Documentos/Ciga/agenda/PPD02/DO114.pdf