This paper aims to analyze the technical viability of a stormwater harvesting system for non-potable uses in a building at the Federal University of Uberlandia, Uberlandia, Brazil, which contains classrooms and lecture halls. Two types of analysis were carried out: a quantitative one, to verify whether the amount of stormwater collected meets the demand for non-potable water; and a qualitative one, to verify whether after disposal of the first millimeters precipitation, the stormwater collected is of good enough quality to meet the demand. The results show that the implementation of the system is viable from the quantitative point of view, since in the simulation using the Netuno Method, an accumulation tank was obtained with 7.9 m3 to 18.2 m3 for a drinking water savings potential between 18.2% and 53.2%. Furthermore, the qualitative results indicate that the implementation of the system is viable, since by discarding the first 2.5 mm of precipitation of the first rains after the dry season and implementing a more efficient suspended solids retention system, all parameters analyzed meet the ABNT NBR 15527 (ABNT, 2007) and NBR 13969 (ABNT, 1997) standards and the ANA Manual for Conservation and Reuse of Water (AGÊNCIA..., 2005).
Stormwater harvesting; Stormwater quality; Sizing of tanks
