Different levels and types of services and the human rights to water and sanitation 2015, para. 69
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Households may also have their own water supply from a private well or borehole. Private wells may not provide a regular or year-round supply of water, with seasonal dry periods being problematic in some regions. To ensure water quality, wells must be protected from animals and other sources of contamination. Wells in high-density urban areas are often at great risk of contamination. In some instances, a household will sell water to neighbours. Although this may be safe in some rural areas, there is seldom any regulation of water quality or affordability, or of construction and maintenance.
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Non-negotiated soft law
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Special Rapporteur on the human rights to safe drinking water and sanitation