Användningsområden för regn- och dagvatten

Sammanfattning: Sweden uses pure drinking water for all household areas such as flushing toilets, watering the lawn and so on. This can be seen as a waste and stormwater can therefore be used instead to save resources. When rainwater is going to be used, different possibilities exist. A rainwater tank can be used to collect water from roofs and store it in a sealed tank. A stormwater pond can be used which collects water from a large area, where the water comes from roofs, drainage, and other surfaces. Rainwater tanks is often used abroad but the use of a stormwater pond for the use of rainwater is rare. A literature study with descriptions of both the use and design has therefore been analysed and it has been discovered that there are no technical obstacles and no laws or regulations that could be an obstacle for using either a rainwater tank or a stormwater pond for the use of rainwater in toilets. The study has concluded that the rainwater tank have environmental advantages but is not financially viable in a reasonable time period. The stormwaterpond on the other hand have more environmental advantages and the investment can become viable within a reasonable time period which can show decision-makers and politicians that it can be a good idea to install this system for the use of stormwater to save water and, by extension, money.