puits (1) qualité de l'eau (1) température (1) élimination (1) santé publique (1) province (1) phosphate (1) nitrate (1) gestion (1) anion (1) intérêts (1) ammonium (1) eaux souterraines (1) effet (1) eau potable (1) dosage (1) maladie (1) adsorption (1) taux (1) Afrique (1) World health (1) Water quality (1) Groundwater (1) Water (1) Tetralogy of Fallot (1) Temperature (1) South Africa (1) Public health (1) Performance (1) Percentage (1)