Measures to combat water pollution are. Do not pour grease or fat down the sink. Minimize the use of chemical cleaners. Reduce the use of herbicides, pesticides and fertilizers in agriculture. Do not throw garbage into ponds, lakes, streams, rivers and seas. Use water sparingly and efficiently. 

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Currently, environmental pollution is very common, especially water pollution. The reason is that we are not aware of environmental protection. Students also throw garbage indiscriminately. Untreated garbage has been dumped into rivers or discharged toxic substances or water. Spray insecticide on the ground then soak in source water. In general, water pollution is caused by us. That's why we need to protect clean water.