If Your unit is condemned then you will given some kind of notice from your city saying how much time you have to get out. I will lay odds that the only thing they can condemn is the rental unit and again did you ever get a copy of the original repair order ? ( have you called your city to learn if there is city water taps available on your road ? I say to ask that because It sure would be handy to know if they are going to hook on to public water ) If you must vacate then your free to not only demand pro rated refund for sept rent but full refund of your deposit and Id say they have no excuse to not give it up since this is not your fault.