Method for determining the rate of sewage and improving quality of gaseous effluents emitted from buildings [...] and abstract the present invention relates to a method for determining the rate of sewage and improving quality of gaseous and liquid effluents emitted from residential buildings [...], commercial centers and services facilities, innovation by their respective standard local treatment of sewage (septic system and filter system). According to the method of this invention, the raw sewage generated by these buildings is segregated in two streams classified as high and low organic filler, undergoing each, a novel method of treatment, basically constituted; by utilizing the equipment called "aerator/[...]" and " washer ' that when used together provide the organic load reduction of sewer and simultaneously cited, removing gasses causing pollutants and greenhouse, respectively the [...] nitrogen (no2) and carbon dioxide (co2), usually emitted by exhaust systems and building ventilator Desktops heaters. Another aspect of this invention is relevant utilizing the urine as fluid capturing existing co2 gasses exhausted Desktops of heaters, wherein the effluent end consisting predominantly of a solution of ammonium bicarbonate, having application in hardness and chemical industry. For purposes of ensuring the necessary economic enhancement this technique and to encourage its application, user preference of these buildings, developers, real estate and other interested parties venturers, it is proposed a new tariff model sewerage, for [...] concessionary locations by water and sewage. Such sewage tariff model has as major features the fact this scenario of the fare be water, and by adding a factor depressing sewerage tariff, in function of the value of its organic filler measured, before continue to tap water bodies or other receptors.