The present invention provides for effervescent solid compositions for cleaning and/or disinfecting all surfaces in the form of a compressed tablet containing an effervescing component, a germicidal agent, and a non-ionic surfactants, but free of any anionic surfactants, wherein the weight ratio of the basic ingredients to the acidic ingredients of the effervescing component is within a range of from about 1.0 : 1.0 to about 1.0 : 4.0.