The Casablanca-Settat region generates about 154.6 million m³ of raw wastewater a year, and 125.4 million m³ of it is discharged to the sea, according to the national statistics office's 2025 regional report. Reuse across the whole region is estimated at about 5 million m³ a year. The city of Casablanca alone needs an estimated 220 million m³ of drinking water a year.
A resource flowing past the city
The same 2025 report puts treated volume at about 133 million m³ a year from 18 treatment plants, without reconciling that figure with the volume sent to sea. The World Bank lists Casablanca among the large coastal cities that rely on pre-treatment and marine outfalls rather than full treatment.
The National Water Plan sets a 2050 target of 9 million m³ of treated wastewater to be mobilised in the city of Casablanca. That is small beside the city's estimated need of 220 million m³ a year.
Médiouna is the working example
The main reuse site today is Médiouna, which, with the abattoirs plant, supplied about 5,000 m³ a day, or 1.8 million m³ a year, for green-space irrigation under Lydec's 2022 plan. An extension costing about 109 million MAD will double the plant's capacity from 3,800 to 7,600 m³ a day. Works were about 70% complete on 30 April 2026, with commissioning due by the end of 2026.
A regional programme announced
In June 2026 the president of the Casablanca-Settat Regional Council announced a 1.6 billion MAD programme to extend treated-wastewater reuse across the region.
What the report covers
The report also answers where Casablanca's drinking water comes from, how full its dams were on 1 October 2026, who owns the new regional operator, and what the 300 million m³ desalination plant will cost per cubic metre. The full report, Casablanca City Intelligence Profile, is available for USD 99 at https://ourfuturewaterintelligence.com/reports/casablanca-city-intelligence-profile. For a free overview, see https://ourfuturewaterintelligence.com/cities/casablanca.