Applies to all domestic breeds in my experience if bought from the regular trade.When I used my tap water with a GH around 225 ppm my cockatoo didn’t live more than one year.
Affected species: A. cacatuoides, A. macmasteri, A. agassizii, A. hongsloi, A. borellii, Mikrogeophagus ramirezi.
It's not the water itself, it's side effects of the parameters.
A cheap RO unit in the area of 50-100 € pays off quite fast. With canisters and extra hoses/pumps you can have the basic recommended equipment for about 100€ if you lean into it.
And I'm sure almost everybody here will tell you it's worth it.