This study investigates the potential for potable water savings by using rainwater in a home in Blumenau, southern Brazil. The water end-uses were estimated based on frequency and time of use of the water appliances. The water flow rates were measured using containers and a stopwatch. Besides the estimated water consumption, daily measurements were taken using a water meter. The water consumption estimated was compared with the consumption measured and the water end-uses were obtained. The water for activities that did not require potable water accounted for 46.5%. This percentage was used as input data in the Netuno computer programme along with other parameters for the design of a rainwater harvesting system. The use of rainwater in the house, using a 2,000-litre tank, would provide potable water savings equal to 44.8%. This study demonstrated that there is a great potential for the use of rainwater in single-family houses in Blumenau.

One alternative measure to minimise the stormwater runoff volume and its pollutants and reduce impervious areas is to use permeable pavement. However, due to weak mechanical performance under heavy-load traffic related to fatigue resistance, porous mixtures and permeable pavements have restricted applications, i.e., parking lots and low-traffic roads. This work aims to evaluate the fatigue resistance of a porous asphalt mixture produced with highly modified asphalt (HiMA) and its potential contribution to reducing stormwater runoff and pollutants. In order to estimate the capability of runoff pollutants and stormwater flood reduction, a case study was performed on an urban road. A permeable pavement was designed using the porous mixture as a surface layer. The mixture volumetric parameters and asphalt content were established using the Marshall method, considering the void content, interconnected voids, permeability, Cantabro test, and moisture damage test evaluation. The resilient modulus and fatigue resistance tests were performed on a diametral compression device. The mixture design resulted in an asphalt content of 5.1% and a void content of 21.5%. The resilient modulus was 2764 MPa, and the porous mixture obtained excellent fatigue performance, allowing its application in diverse traffic conditions. The porous mixture efficiency infiltration capacity was 90%, and some runoff pollutants could be reduced after being filtered by the pavement surface, contributing to minimizing environmental contamination. This work filled part of a gap in predicting porous mixtures’ fatigue performance, collaborating to popularise and expand its use for various purposes.