Why does tap water taste or smell weird sometimes?

The short answer

It's safe. It just doesn't taste like home. Morocco's tap water comes from Atlas limestone aquifers — high in calcium and magnesium, mineral-heavy in a way that reads as flat or chalky to most visitors. In older buildings, decades-old pipes and rooftop storage tanks add their own character. It's not chlorine. It's geology.

The water is safe. It just doesn't taste like home.

Morocco's tap water comes from Atlas Mountain aquifers filtered through limestone and mineral-rich rock. Calcium and magnesium concentrations run higher than most northern European water — this is what makes it "hard" and gives it that distinctive flat, chalky taste. You're drinking dissolved mountains, essentially. The treatment plant adds standard-level chlorine for disinfection, but the dominant flavour is mineral, not chemical.

In Marrakech specifically, the source is the Tensift basin and Atlas snowmelt. The mineral profile changes seasonally — heavier after rains wash more calcium through the aquifer, lighter in dry months. Casablanca's water tastes different again, drawn from the Bouregreg basin. Each city has its own water character, the way each city has its own bread.

In older riads, the plumbing adds its own layer. Galvanized steel pipes installed decades ago leach trace minerals as they corrode. Rooftop storage tanks — common in buildings where mains pressure is inconsistent — can develop sediment if not cleaned regularly. The water entering the building is fine. The water reaching your tap has picked up the personality of every pipe it's passed through.

Most visitors drink bottled water out of preference, not necessity. Sidi Ali and Sidi Harazem are the local brands — both drawn from Atlas springs, both widely available, both costing about 5 dirhams for a liter and a half. But plenty of Moroccans drink the tap water daily. It's a taste adjustment, not a safety issue.