The partially below ground (PBG) tank incorporates the merits of both above and below ground tanks in one simple, low-cost design. The PBG tank takes advantage of the support given by the soil, to do away with the need for a structural component below ground level. At the same time protection is given against contamination by surface runoff and damage by vehicles by incorporating a 1m high parapet wall. The tank is lined with ferrocement render and fitted with a handpump for water extraction (TR-RWH 09). The thin shell cover (TR-RWH 04) is fitted on the tank.