Igwe mmiri dị elu, nchekwa ọkụ ụlọ, Central ikuku ikuku mmiri na-ekesa, mmiri na-ekesa mmiri na sistemụ injinia, Ngwọta mmiri na-ekpo ọkụ, mmiri na-ekpo ọkụ, mmiri mmiri na-emepụta mmiri na drainage, ogbugba mmiri n'ubi, Osisi mmiri, osisi akwụkwọ, ọkụ ọkụ, thermal ụlọ ọrụ ọkụ, osisi nchara, osisi kemịkalụ, ọrụ nchekwa mmiri, mmiri na mpaghara mmiri, na ihe ndị ọzọ.
Tụkwasị na nke ahụ, iji ihe ndị na-eguzogide corrosion ma ọ bụ ihe ndị na-eguzogide ọgwụ nwere ike ibufe mmiri mkpofu ụlọ ọrụ na-emebi emebi, mmiri oké osimiri, na mmiri ozuzo nwere ihe siri ike kwụsịtụrụ.