The number is likely much higher than that, Moroccans all know the official demographic numbers (for big cities) are vastly understated because they're not base

The number is likely much higher than that, Moroccans all know the official demographic numbers (for big cities) are vastly understated because they're not based on a census like in say the US, but rather based on a registry of every single person like in most of Europe, only there are millions of internal migrants who don't register when they move to the city, and there's significant semi-homelessness and shanty towns which aren't reflected in the official numbers. For Casablanca it's usually a really really big difference, with official numbers at 3 million and some, and locals approximating it topping 6 million. The official numbers in Rabat aren't as inaccurate but 150k households at least feels much lower than my personal experiences.