các chỉ tiêu phân tích nước thải đô thị ở Lạng Sơn đều vượt quá giới hạn cho phép, do nước thải không qua xử lý đổ thải trực tiếp ra môi trường , nước thải bị ô nhiễm nặng BOD5, COD và coliform
waste water analysis indicators municipality in lang son were in excess of the allowable limit, due to untreated sewage dumped waste directly into the environment heavily polluted wastewater, BOD5, COD and coliform
analysis of indicators of urban waste water in Lang Son are beyond the limits permitted by the untreated wastewater directly discharged into the environment, heavily polluted wastewater BOD5, COD and coliforms
These indicators analysis in Lang Son city sewage exceeds the allowable limit, because the wastewater without any treatment directly to the environment of waste water pollution is very serious and expensive BOD5, coliform