Put in your own rain barrel, figure ways to use grey water,
put in a well and make sure you have the water rights to it,
get on the planning commission of your city and make sure they
have water rights and the ability to move and treat the water.

Many places have over allocated water rights IE water is
owned based on the highest water available in 100 years
(the 100 year event). Many large cities are buying up rural
water rights quietly. This will be a surprise to a lot of
rural folks when they find out the water they are pumping from
their well belongs to someone else or at least have to go to
court to prove it belongs to them.