Sorry for the late reply (I hope it isn't too late). The water itself won't do you any harm, but the taste can take some getting used to, and tends to vary depending on where you stay. One thing that does occasionally happen is that landlords don't clean out their water tanks properly, which affects the quality of the water, so it's a good idea to check this out. Bottled water is, however, widely available.
Sorry for the late reply (I hope it isn't too late). The water itself won't do you any harm, but the taste can take some getting used to, and tends to vary depending on where you stay. One thing that does occasionally happen is that landlords don't clean out their water tanks properly, which affects the quality of the water, so it's a good idea to check this out. Bottled water is, however, widely available.
As for utility costs, have a look at Cost of Living in Dubai to get an idea.
All the best,
Xavier