Can u correct me this essay?

water drinking is an esseintial element in human life.Human should keep the water clean and safe ,I find this topic intersting and important because my major in environmnet and also we have in home country high percentage in fecal coliform bacteria in our muncipal system ,so I need to intrduce this topic in much details .Drinking water might be polluted by feacl coliform bacteria .This pollution one of many pollutent which pollute water in many countries .From the researcher who had done in aquateic feild ,they notifed that coliform bacteria may polluted drinking water by two main factores first coliform bacteria enter to water net work throw water pipes which leadx to contaminate surface water,also fecal coliform bacteria may enters throgh the soil into graund watre ,which can pollute graund water.
First factor is