National Sanitation Utility

ONAS was established by Law N° 73/1974, dated 3 August 1974, and was entrusted with the mission of management of the sanitation sector.

The law establishing ONAS was amended by virtue of Law N° 41/1993, dated 19 April 1993, thus raising ONAS to the status of the main operator in a matter of protection of the water environment and of combating pollution sources.

ONAS is a public institution of an industrial and commercial character, enjoys the civil status and financial autonomy and is placed under the authority of the Ministry of Local Affairs and Environment.