in hai phong waterquality monitoring has been conducted since in channels lakes estuaries and rivers of the re river gia river and da do river however the number of parameters covered and the frequency is not sufficient given the limited city budget city of hai phong in addition to strengthen pollution source control with industry the city should invest in installing realtime monitoring stations in major water systems and make the data available to the public the sewer system of hai phong city which is similar to other systems in urban areas across the country is a tributary drainage system in which rainwater and wastewater flow through the same system