Minsters are nice and all but now is not really a good time for California businesses to up their water usage.
I'm not sure how things are different in anahiem, or with a big buisness like Disney, but California is still in a drought and last year the situation was near crisis level causing mandated water use restrictions and mandated water use reductions statewide. There were places in California that actually ran out of water. This would have a big impact Disney adding more things that would use up water. Last year California rain levels were lower than anything in seen in over a hundred years statewide. I heard a lot of estimates that it would take 5 or more years of greater than average rainfall to get CA out of its drought, so it is certainly no where near out of trouble right now water wise. We had Decent rain year this year but having a record breaker after several straight years of milder drought has left California's water supply in a not so good place.
In my town were were only able to water our lawns twice a week for 5 minutes and could be ticketed if we had run off. At my work they were fined for not decreasing thier water use by the percentage that were supposed to. Disney likely can get away with a lot of things smaller businesses and residences couldn't but, not even Disney can get away with wasting substantially more water when there is so much pressure and even new laws and regulation about decreasing water use.