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Fund a Bio-Sand Filter

IAS Clean Water Projects

  1. Bio Sand Filter
  2. Clean Water Well
  3. Pit Latrines
  4. Mini Water Yard
  5. Well Rehab
  6. Animal Troughs
Price: $214.00

Bio Sand filter

Bio Sand Filters

A bio-sand filter is a small, concrete container meant for household use which is filled with sand and some standing water in order to remove pollutants from water.

Bio-sand water filters are a cheap and reliable way of purifying drinking water for household use. These filters are particularly effective in removing pathogens (disease-causing organisms) in their various forms; bacteria, viruses, protozoa, and helminths. In addition, bio-sand filters are effective in removing turbidity and some trace metals.

One bio-sand filter can serve six to fifteen people, and will last as long as 50 years.  The clean water produced from one bio-sand filter can improve the health of an entire family, which is especially important in developing world countries where medical treatment is problematic.

Bio-sand water filters have proven to be a practical, effective and economical water-quality treatment alternative in developing nations. They are usually the preferred alternative when one or more of the following conditions exist:

  • The primary source of water for a community is polluted surface water.
  • Pathogenic contamination is the main concern with available drinking water.  
  • No centralized water-treatment facilities exist in an area, and it is not economically viable to build such facilities.
  • Wells are the primary source of water for a community, but donkey carts are often used to transport the water to end users, making water contamination likely.

The Center for Affordable Water and Sanitation Technology (CAWST) developed a sustainable, bio-sand filter for rural villages, refugee camps, and urban slums in developing nations. Variations of this model of a bio-sand filter are widely used today throughout the developing world.

Bio-sand water filter cost break down

  DESCRIPTION QTY UNIT PRICE (SSP) TOTAL (SSP ) TOTALUSD
1 Portland cement (40 kg bag)  0.5 Bags 65 32.5 11
2 Sand (50 kg for filter and 50 kg for filter media) 100 Kg 0.25 25 8
3 Gravel (<0.60 cm) - 25 kg for filter, 10 kg for filter bed 35 Kg 0.5 17.5 6
4 Gravel (<1.2 cm) - 25 kg for filter, 10 kg for filter bed 35 Kg 0.5 17.5 6
5 Plastic tubing (6 mm inside diameter ID, 9 mm OD) 1 M 10 10 3
6 Vegetable oil (to coat molds) 1 Litres 10 10 3
7 Wood (2.5 cm by 10 cm by 3.0 m long) 4 Pcs 12.5 50 17
8 Wood (2.5 cm by 2.5 cm by 3.0 m long) 4 Pcs 12.5 50 17
9 Screens (openings: 1.2 cm), 1.0 m by 1.0 m  1 Pcs 30 30 10
10 Screens (openings:  0.60 cm), 1.0 m by 1.0 m  1 Pcs 30 30 10
11 Screens (openings: 0.7 mm and 1 mm), 1.0 m by 1.0 m  2 Pcs 30 60 20
12 Duct tape 1 Rolls 5 5 2
13 Assorted small nails and tacks for wood sieves 1 - 10 10 3
14 Assorted sand paper and rags 1 - 10 10 3
15 Filter lid 1 - 50 50 17
16 Diffusor plate  1 - 80 80 27
17 Training for use of filter (beneficiary) 1 Training 50 50 17
18 Transport/distribution 1 Transport 40 40 13
19 Clean Water Alliance operations 1 - - 43.3 14
19 Logistics & procurement costs in Juba 1 - 22.5 22.5 8
  TOTAL       643(SSP) $214

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You can find additional documentation on bio-sand filters by visiting the IAS Clean Water Alliance resource page.