If you do not want to water pollution, it is a good idea to avoid เหุต that cause waste water and should not leave waste and wastewater before it is discharged into the river.
If you do not want to water pollution. You should avoid Ehu result, causing sewage. And advised not to dispose of waste. And wastewater treatment before discharge into the river.
if you do not want to have water pollution. You should avoid the fail reason causing the wastewater. And should not leave the waste. Purification before dropping into the river!