{Subsurface
flow, no visible water, no attraction to mosquito, no health risk to humans and animals.
{Natural
wastewater treatment plant, sustainable eco-system, no use of chemical, no energy requirements and therefore, no contribution to global warming.
{Highly
popular On-Site system recommended by the EPA of the USA.
{The
construction cost is divided between donor organization who purchase the materials and the villager's self work contribution.