How Water Is Purified Naturally

BOD exceeds the dissolved oxygen if the water is flowing vigorously in a shallow stream (this facilitates the absorption of more oxygen from the air via aeration). 

Organic nitrogen is converted to elemental nitrogen by these bacteria. Given enough time, enough oxygen may become available, and aerobic oxidation will then return. 

The federal law requiring cleanup of hazardous waste sites that can pollute water is called.  

Hazardous wastes can be indiscriminately placed in landfills, (a) True 

Name three household wastes that can contaminate groundwater with the same harmful chemicals as industrial wastes. Beside each, list the harmful chemical. 

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