Food industries release putrefied organic matter.

The optimum condition for BOD measurement is 25 degree centigrade / dark / 5d.

BOD value of pure drinking water is 1.

Agricultural sources increase the level of nitrates and phosphates in water bodies. It causes rapid algal growth, making water oxygen deficient, leading to suffocation of aquatic life. This is called eutrophication.

Gambusia eats larvae and eggs of mosquitoes and keeps the water clean.

The disease caused by drinking water contaminated with nitrates is methemoglobinema.

Untreated sewage is the largest source of water pollution in India.

Thermal discharge heats up the water, destroy aquatic life, decreases oxygenation and increase the toxicity of toxic pollutants.

Jaundice is caused by water pollution.

NGRBA functions to finance, implement, monitor, plan and coordinate the pollution of Ganges.

As reproductive tract cells divide rapidly, these areas of the body can be damaged at rem levels as low as 200.

The spread of radioactive pollution through Earth's atmosphere is called fallout.

Miamata is caused due to mercury pollution.

Water is aerated to promote bacterial decomposition in secondary treatment.

Open defecation is the main source of surface water pollution.