Based on this research, eﬀorts were made to ﬁnd an appropriate technology for a simple, low-cost way to improve water quality. Several small reservoirs have been built to test their feasibility for reducing potential contaminants in irrigation water. The cleaning process is quite simple and greatly assisted by solar radiation and increased temperature. First, water enters the reservoir, where it is retained for about 10-14 days. While there, the water is exposed to physical processes that act on the pathogens and parasites. For instance, the action of keeping the suspended bacteria isolated from their biological cycle for more than ten days reduces their concentration and viability. At the same time, parasites sink to the bottom of the reservoir and eventually die, leaving the water clean for vegetable irrigation.