GK
ECOLOGY BIODIVERSITY CONSERVATION ENVIRONMENTAL ISSUES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
10
|
|
|
100
|
|
|
1000
|
|
|
150
|
Detailed explanation-1: -For every 100 mL of drinking water tested, no total coliforms or E. coli should be detected.
Detailed explanation-2: -(b) Microbiological quality. Coliform bacteria levels should not exceed 4 per 100 milliliters in more than one sample examined each month.
Detailed explanation-3: -As per the Bureau of Indian Standards [20], total coliform counts of less than or equal to 10 CFU in 100 mL is acceptable for drinking water quality.
Detailed explanation-4: -coli in 100 ml; (2) No sample should contain more than 10 coliform organisms per 100 ml; and, (3) Coliform organisms should not be detectable in 100 ml of any two consecutive samples.” In nonpiped systems, the coliform count should not exceed 10/100 ml.
Detailed explanation-5: -While coliform is not a causes of illness, they indicate that pathogenic organisms of faecal origin, be it bacteria, viruses, or protozoa may exist. The Central Pollution Control Board (CPCB) stipulated that the total coliform standard at the intake point for a water treatment plant in India be set at 5, 000 MPN/100ml.