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Which one of the following compounds of nitrogen, when in excessive amounts in water, contributes to the illness known as infant methemoglobinemia ?

Which one of the following compounds of nitrogen, when in excessive amounts in water, contributes to the illness known as infant methemoglobinemia ? Correct Answer Nitrate

The permissible limits of various compounds are as follows:

Parameters

Permissible

Limit

Cause for

rejection

Total suspended solids

500

2000

Turbidity (NTU)

1

10

Colour (TCU)

5

25

Taste & odour (TON)

1

3

Total dissolved solids (mg)

500

2000

Alkalinity

200

600

pH

7 - 8.5

<6.5 & > 9.2

Hardness (mg/L)

200

600

Chloride content (mg/L)

250

1000

Free ammonia (mg/L)

0.15

0.15

Organic ammonia (mg/L)

0.3

0.3

Nitrite (mg/L)

0

0

Nitrate (mg/L)

45

45

Fluoride content (mg/L)

1

1.5

Iron as Fe (mg/L)

0.1

1.0

Sulphate (mg/L)

200

400

Calcium (mg/L)

75

200


Fluoride or fluorine deficiency is a disorder that may cause increased dental caries (or tooth decay) is the breakdown of dental tissues by the acidic products released by the bacterial fermentation of dietary carbohydrates.

Excess of nitrates is harmful to infants and causes Methemoglobinemia or Blue baby disease.

Lead in excess is toxic to many organs and tissues including heart, kidney, bones, intestines, reproductive system and nervous system. Excess lead causes anemia.

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