A simple application with great productivity

The rain is a great source of water that is often under developed. The best way to optimize this free resource is to capture the rain and store it in tanks for future use.

According to latest statistics, the water footprint of a family of 4 persons is between 150 and 200 m3 per annum in a house fully equipped (washing machine, bath & showers, etc.) so an average of 50 m3/capita/annum.

Moreover, UN statistics declares that human being should need a minimum of 50 liters per day or 18 m3/ capita/annum.

Now, knowing the method to calculate the potential of water collection is as follow:

Catchment surface x 0,7 x average annual rainfall = Total rain catchment

… in Sierra Leone, the yearly average rainfall is 5000 mm/year so with a roof of 100 m2, the annual rain catchment would be potentially 560 m3 per year which help 31 persons using 50 litres per day per capita.

Rain harvesting systems require very little maintenance and CAPEX and OPEX are extremely low: AWSE recommends a bi-annual cleaning of the filter and an annual maintenance of the filtration and the purification equipment.

Rain Harvesting


AWSE believes rainfall harvesting is a great sustainable solution for water production in Africa in specific zones since these projects have on one hand low capital expenditures and very low operational costs and on the other hand strong water catchment potential.

Do not hesitate to contact AWSE for a personalized offer or for consulting.