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In the following cities high levels of non-revenue water have been substantially reduced: Dolphin Coast (iLembe), South Africa, 30% in 1999 to 16% in 2003 by the private utility Siza Water Company; [38] Istanbul, Turkey, from more than 50% prior to 1994 to 34% in 2000 by the public utility ISKI; [39]
The water supply system in Johannesburg, South Africa, has increasingly not been able to supply residents with water.Since 2016 [1] the city has practiced “water throttling” to reduce demand, [2] instead of addressing the problem of unaccounted for water and non-revenue water.
However, in other African countries the level of non-revenue water is extremely high: For example, it exceeds 45% in Zambia, is more than 60% in Maputo (Water supply and sanitation in Mozambique|Mozambique), 75% in Lindi (Water supply and sanitation in Tanzania|Tanzania) and 80% in Kaduna (Nigeria). [55]
The National Water and Sewerage Corporation (NWSC) is a water supply and sanitation company in Uganda. It is wholly owned by the government of Uganda. [4] As of October 2023, the company supplied 730,000,000 cubic metres (2.5779706707 × 10 10 cu ft) of potable water daily to the country.
Non-revenue water. The average level of non-revenue water among the 20 regional water utilities was 45% in fiscal year 2006–2007. Data reported by the Ministry of Water and Irrigation in 2009 show that non-revenue water in urban areas varies between 55% in Dar es Salaam and 25% in Tanga. It is estimated that non-revenue water is higher in ...
One indicator to measure the technical efficiency of water utilities is the level of non-revenue water. In a well-managed utility that level should be below about 25%. In Johannesburg, the estimated level declined from 44% in 2003 to 31% in 2006. In Durban it stood at an estimated average of 31% between 2002 and 2006.
Only one Water Services Providers (Nyeri) met the benchmark set by the Ministry of Water and Irrigation with levels of NRW of less than 20%. In Nairobi NRW levels were 39%, in Mombasa 48%. Based on the unit cost of production, the nationwide losses due to non-revenue water in 2014 were estimated at KSh.5.2 billion/=, equivalent to US$52 million ...
The largest water resource in the country is the Senegal River in the north, which is shared with Mauritania, Mali and Guinea. Its average flow is 37 billion cubic meters per year. The Lac de Guiers is an important water reservoir in the upper delta of the Senegal River, with a storage volume of almost 500 million cubic meters. It is a chief ...