Tests conducted by the DENR Region 10 office showed high biological oxygen demand ( BOD ) in water samples from thesupply which comes from an underground water reservoir connected to a river near the Carmen landfill.
12.
For example, tanker truck-sized spills of substances such as milk can cause a lot of damage in the local aquatic ecosystems : the added biological oxygen demand causes rapid eutrophication, leading to anoxic conditions in the water body.
13.
Biological Oxygen Demand is a measure of how much oxygen is used up by organisms as they try to consume the waste, the end result of aeration should be reduction of the BOD as the wastes have been removed.
14.
The water quality status of the Lower Manair Reservoir was studied from September 2009 to August 2010 for the physico-chemical parameters such as water temperature, pH, turbidity, transparency, total dissolved solids, total hardness, chlorides, phosphate, nitrates, dissolved oxygen ( DO ) and biological oxygen demand ( BOD ).
