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The lack of environmental sanitation in the rural area poses risks to the environment and the health of the rural inhabitants, since they use water coming from a well or directly from the watercourse and, therefore, this work had the objective of designing and constructing a treatment system of sanitary effluents, through an evapotranspiration tank for rural property with up to two inhabitants, using ornamental species, in the city of Rio Verde, Goiás. For the dimensioning of the tire chamber of the tank, the current Brazilian Standard was used. The useful volume of the tire chamber was 3.26 m² and the total area of the evapotranspiration tank was 10.5 m² (dimensions 3.5 x 2 x 1.5 m). The evapotranspiration tank is a viable system because, for its construction materials are used that can be purchased at no cost, reusing materials such as construction and tires, collaborating with the environment, as well as reducing the amount invested for the construction of the Evapotranspiration tank. Cleaning up in the minimum salary of 2019, which was in the amount of R$ 998.00, for the construction of the evapotranspiration tank were spent less than 1 minimum wage, already, for a septic tank is spent on average from 2 to 4 minimum wages. [ABSTRACT FROM AUTHOR]