railway RRB JE (CBT I + CBT II) Mock Test 2024 Environmental Engineering Quality of Water

As per Indian standard (IS 10500: 2012) of drinking water specification, the concentration of iron in drinking water should not exceed:

1

0.5 mg/L

2

0.4 mg/L

3

0.3 mg/L

4

0.2 mg/L

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