Nitrate in groundwater may come from point sources such livestock facilities, sewage disposal systems, including septic tanks and non-point sources such as fertilized cropland, or naturally occurring sources of nitrogen [Sapek 2004; Sądej and Przekwas 2006; WHO 2008]. Unlike water from deep wells located in rural areas which is supplied by distribution systems, water in household wells is particularly prone to NO 3 pollution [
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