Safe Communities and Safe Schools Mercury Reduction Act of 2005

Safe Communities and Safe Schools Mercury Reduction Act of 2005 - Requires the Administrator of the Environmental Protection Agency (EPA) to establish a grant program for projects to: (1) reduce free-flowing elemental mercury and mercury-added products from the environment; (2) safely dispose of or recycle mercury; (3) educate communities and citizens about mercury's harmful effects; (4) develop and carry out a plan for eliminating free-flowing mercury and instruments containing mercury from K-12 public and private schools; (5) carry out a mercury thermometer exchange program; or (6) facilitate the recovery, and safe disposal and management, of mercury-added components from automobiles.

Directs the Administrator to encourage States to develop programs that facilitate the recovery and safe disposal and management of mercury-added component parts from automobiles when components are being replaced or removed from scrapped vehicles.

Amends the Solid Waste Disposal Act to: (1) prohibit the sale or supplying of mercury fever thermometers to consumers except by prescription; and (2) require manufacturers of such prescribed thermometers to provide instructions on careful handling to avoid breakage and proper cleanup in the event of breakage. Requires contractors who replace building thermostats in residential or commercial buildings to dispose of replaced thermometers through recycling programs established or participated in by building thermostat manufacturers as required by this Act.

Requires the Administrator to publish guidance to assist State and local governments in removing elemental free-flowing mercury and mercury-added instruments from public and private schools.

Directs the Administrator to issue regulations requiring dentists to capture 90 percent or more of mercury-laden amalgam when administering amalgam to or recovering amalgam from patients. Sets forth considerations that such guidelines shall take into account.