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Raw polluted water is often contaminated and can cause environmental harm and pose health risks

In my opinion, reused for irrigation of the effluent of secondary treatment of pulp and paper plant is very crucial  in the last quarter of the 20th century's plant production. In the  use of polluted water for irrigation is becoming increasingly common in countries that do not have enough clean water. However, raw polluted water is often contaminated and can cause environmental harm and pose health risks. Nevertheless, it is often used without any significant pretreatment, a practice mistakenly considered safe. If water is viewed as an economic good and a finite resource that should be valued and managed in a rational manner.  I think current environmental policies should aim to control pollution and to maximize recycling and reuse of GW within households and communities. We know that water quality criteria have been widely established for a number of traditional water quality variables such as pH, dissolved oxygen, biochemical oxygen demand for periods of five or seven days (BOD5 and BOD7), chemical oxygen demand (COD) and nutrients. Especially in countries with rivers affected by severe organic pollution, it  should be  established of control strategies to decrease the potential for oxygen depletion and the resultant low BOD and COD levels.

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