@Al_HikesAZ The "lat / long" to water sources in Arizona is a combination of boot prints, horse hooves, bike tread, discarded personal effects, and cow poo. You won't be likely to miss the water sources once you're in the general vicinity. Ok, I exaggerate the impacts a tad. Bottom line, water is life, nowhere more so than in the desert. And yes, the pine forests of northern Arizona also qualify as a desert, at least in regard to water availability. But probably not this year! Been raining and snowing quite a bit throughout the state of Arizona this winter, from what I gather.
The more serious answer is that the Arizona Trail topo maps CD includes a data book of its own which lists the waypoints for all POI's shown on the maps (the numerical coordinates in decimal degrees). This includes a majority of the water sources listed on the regularly maintained water chart linked on the ATA website. Not all of the waypoints are field-recorded at this point, but should be close enough to reality for thirst-quenching purposes.