Question

Limit of BOD prescribed by Central Pollution Control Board, for the discharge of industrial and municipal waste waters into the surface water is:

• A. < 100 ppm
• B. < 30 ppm
• C. < 3.0 ppm
• D. < 10 ppm

Answer 1

The correct option is B < 30 ppm

The central pollution control board has framed general standards for discharge of environmental pollutants under 'The Environment Protection Rules', 1986. The standards have been fixed for a number of parameters like arsenic, colour, odour, oil and grease, BOD, COD, suspended solids, particulate size etc. The limiting value standard acceptable for BOD are 30 mg per liter for inland surface water, 350 for public sewer, 100 for land and 100 for marine coastal areas.