Hopefully, the good work that the AZ Water Institute has done will remain in place after their funding dries up. Especially this site, the Arizona Hydrologic Information System or AHIS.
It's intended to be a one-stop-shop for water related info in the State of Arizona. Obviously a work in progress still, but they provide links to just about every conceivable source of knowledge relating to water in Arizona. Check it out and see what they have to offer.