Abstract: The invention provides environmentally safe compositions and methods for cleaning surfaces to remove soap scum, iron oxide, calcium carbonate or calcium stearate deposits, or a combination thereof, from surfaces. The compositions of the invention comprise calcium chelating agents, one or more nonionic surfactants, one or more chelating agents, one or more anionic polymeric surfactants, an acid, and water, wherein the composition is alkaline. The compositions generally have a pH between 7.0 and 10, are biodegradable, non-toxic, free of VOCs, and are made of renewable, sustainable materials.