Wastewater management in the realization of the rights to water and sanitation 2013, para. 51
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One of the biggest incentives for improved wastewater management is the increasing understanding that wastewater is a resource. In the agricultural sector, an estimated area of between 4 million and 20 million ha worldwide (i.e., the surface area of Switzerland and Senegal, respectively) is irrigated with wastewater or fertilized by sludge. While this use is welcome, when the use is unregulated, it exposes producers, residents and consumers to health risks. Therefore, the risks and benefits of irrigation with wastewater need to be balanced. The Guidelines on the Safe Use of Wastewater, Excreta and Greywater in Agriculture and Aquaculture provide useful standards. In Namibia, the Special Rapporteur witnessed efforts to treat wastewater to the standard of drinking water (see A/HRC/21/42/Add.3, para. 15).
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Special Rapporteur on the human rights to safe drinking water and sanitation