Gurbacewar ruwa a Kanada gaba ɗaya na gida ne da yanki a cikin Kanada mai wadatar ruwa, kuma yawancin mutanen Kanada suna da "samun isasshen ruwan sha mai arha, da tsaftatacce Ko mai tsafta." An samu haifar da gurɓacewar ruwa a Kanada ta ƙazanta na birni, zubar da ruwa a birane, gurɓacewar masana'antu da sharar masana'antu, gurɓataccen aikin gona, rashin isassun kayan aikin ruwa. Wannan barazana ce ta dogon lokaci a Kanada saboda "haɓakar yawan jama'a, cigaban tattalin arziki, sauyin yanayi, da ƙarancin samar da ruwan sha a wasu sassan ƙasar." Duk da yake yawancin mutanen Kanada suna samun ruwa mai tsafta, a cikin gida da yanki akwai lokuta na "rufe bakin teku na jama'a, kuma gurbataccen ruwa, furannin algal, ciyawar ciyawa, kisa, rufe girbin kifi, shawarwarin tafasa-ruwa, barkewar cututtuka na ruwa, da gurɓatacce. ruwan kasa", a cewar wani rahoto na 1998 daga British Columbia. Gurbacewar ruwa na faruwa ne sakamakon najasa na birni, zubar da ruwa a birane, sannan gurbacewar masana'antu da sharar masana'antu, gurbacewar aikin gona, rashin isassun ababen more rayuwa na ruwa.