The measure should be part of comprehensive water safety programmes, including source protection.

Even when the water source itself is safe, water used for drinking and cooking is often contaminated because of poor water handling practices and unsafe storage.

Water from many so called improved sources is contaminated because of poorly maintained or intermittently pressurized networks or untreated and contaminated source water.

In Republika Srpska, 51.4 per cent of households are linked to city water supply, 27.7 per cent to local water supply, while wells are the drinking water source for 13.45 per cent of households.

In rural areas, only 40 per cent of the population has access to traditional wells, the main drinking water source, while most water pumps are in a state of disrepair.

Further cooperation will be provided in the area of water management, since industrial effluents are a major source of pollution to rivers.

This makes China the source of cross border water flows to the largest number of countries in the world. Yet China rejects the very notion of water sharing or institutionalized cooperation with downriver countries.

Source Guy Hutton and Laurence Haller, Evaluation of the costs and benefits of water and sanitation improvements at the global level (WHO, 2004).

UNICEF support to the rehabilitation of systems in the Horn of Africa assisted an additional 2.9 million people to gain access to a safe water source.

Nature, it turns out, can play an important and so far largely untapped role in water delivery and treatment. Protecting water at its source can be cheaper and more efficient than treating it after it has already been polluted.

In the Gorno Badakhshan Oblast, the situation is considerably worse than in other regions. There, only 28 of the population uses water for household needs from a safe source.

During a ten day period in September 1854, during which more than 500 Londoners died from the disease, Snow used a city map to mark the location of each household with a case of cholera. He determined that Londoners who drank from one particular water source were at the highest risk for the disease, and he recommended removal of the handle from the pump supplying drinking water from that source.

This is the Collect Pond, which was the fresh water source for New York City for its first 200 years, and for the Native Americans for thousands of years before that.

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