Drinking water may become contaminated from a range of contaminating sources, including animal droppings, microbes from dead animals, chemicals, farm run-off, industrial or mining waste, urban pollution (such as stormwater) and sewage from leaking septic tanks, or other poorly-maintained onsite wastewater treatment systems
Madzi akumwa akhoza kuipitsidwa kuchokera ku zinthu zowononga, monga manyi anyama, tizilombo kuchoka mu nyama zakufa, mankhwala, zochoka ku munda, zoipa za mafakitale kapena migodi, kuwonongeka m’zinda monga madzi a mvulayamkutho komanso chimbudzi chotuluka mu thanki osunga chimbudzi kapena malo osasamalidwa wosamalira madzi oipa.