The Unforeseen (2007)

This film focuses on the conflict between development projects and the protection of a water table in Austin Texas. The Edwards Aquifer becomes under threat when huge suburban subdivisions are planned. Civic minded residents and aquifer appreciators go into battle on behalf of the land and water and wildlife.

I picked this documentary up because Terrence Malick (The Thin Red Line, The Tree of Life) was listed as a producer. I'm guessing Malick's involvement is based on the overt environmental message.

Official Site | IMDB