Ƙungiyar Muhalli ta Ruwa (WEF) ƙungiya ce mai zaman kanta ta fasaha da ilimi wadda ba ta riba ba fiye da 34,000 mutane da ƙungiyoyi 75 (MAs) masu wakiltar ƙwararrun ɓangarorin ruwa a duniya. WEF, wadda a da aka fi sani da Federation of Sewage Works Associations kuma daga baya a matsayin Hukumar Kula da Gurbacewar Ruwa, da membobinta sun kare lafiyar jama'a da muhalli tun shekarata 1928. A matsayinta na shugaban sashen ruwa na duniya, manufar kungiyar ita ce ta hada kwararru a ɓangarorin harkokin ruwa; wadatar da ƙwararrun ruwa; ƙara fahimtar tasiri da darajar ruwa; da kuma samar da wani dandali na kirkiro sassan ruwa. Membobin WEF sun haɗa da ƙwararru da ƙwararru a fannonin: injiniyan muhalli masana'antu sharar gida magani kula da najasa da najasa sludge magani sarrafa ruwan guguwa nazarin ingancin ruwa da tsarawa da kuma fannonin da suka danganci su. WEF tana da hedikwata a Alexandria, Virginia, Amurka. Bugu da ƙari, littattafai, rahotannin fasaha, da kuma tarurrukan tarurruka, WEF ta buga mujallar da aka yi nazari a kan takwarorinsu, sannan kuma Binciken Muhalli na Ruwa, da mujallar, Fasahar Muhalli na Ruwa.