To enhance the sanitary quality of drinking water, Toulouse Métropole has implemented the 'Qualité +' system in its production plants. The Pech David plant is now equipped with these new treatment methods.
With a production capacity of 150,000 m³ per day, the Pech-David plant is the largest of the three drinking water plants in Toulouse Métropole. This summer, it was equipped with the 'Qualité +' system, following the Clairfont plant (Portet-sur-Garonne) which was equipped in summer 2025.
The 'Qualité +' system aims to improve the sanitary and taste quality of water and further eliminate micropollutants (PFAS), pesticides, and medicinal residues. This system treats water first with activated carbon and then with ultraviolet light, eliminating parasites resistant to conventional disinfectants and reducing the amount of chlorine.
The enhanced treatment process includes several stages: filtration through sieves, remineralization, ozonation to remove taste and odor, activated carbon treatment for pesticides and medicinal residues, UV disinfection against potential pathogenic microorganisms, and chlorination to limit bacteriological risk.
These advancements ensure excellent water quality for users, both bacteriologically and physico-chemically. All three production plants will soon be equipped: Clairfont (Portet-sur-Garonne) since autumn 2025, Pech-David (Toulouse) since summer 2026, and Marquisat (Tournefeuille) in 2027. Water distributed across the Métropole already shows 100% compliance.
Additionally, a seasonal water pricing system is in place: water is cheaper (-30%) from November to May when the resource is more available, and more expensive (+42%) from June to October when water is scarcer in the Garonne river.
