==Costs==
'''Initial cost''': Prices vary considerably between countries and tank quality. In 1991, in Tanzania, a circular above-ground tank made of galvanized iron cost US$ 125 for a 1 m3 tank (US$ 125 per m3) and US$ 550 for a 10 m3 tank (US$ 55 per m3).
==Field experiences==
[[Image:borehole and tank.jpg|thumb|right|200px|A successful borehole in Machakos. Photo: E. Nissen-Petersen, Kenya]]
This water tank in Kenya was built in combination with a borehole as the source. If fresh water is found in sufficient quantities and the water is not saline, the borehole is cased with a special piping.
A recent report for the Ministry of Water by PEM Consultants states that only 60 drilled boreholes are successful. Although Boreholes Contractors cannot guarantee anything, they must be paid in full for their drilling. The borehole seen in the photo (on the right) is 104 metres deep and supplies 20,000 litres of fresh water in an hour, which is sold for Ksh 3 per 20 litres, which is Ksh 3,000 per hour. A successful borehole as this one costs about Ksh 3 million (US$ 35,000), inclusive of casing, pump, elevated tank and pump house.
As a water business, it can be estimated that if recharge can allow pumping for 5 hours daily and the daily operation cost is Ksh 5,000 (US$ 60), the actual income will be Ksh 10,000 (US$ 120) per day. With a loan of Ksh 3 million with 20% interest and fees, it will take 380 working days (3,000,000 + operation 200,000 + interest costs 600,000 / 10,000/day = 380) to recover the investment. Thereafter it is daily profit.
==Manuals, videos, and links==
