Question

Which of the following condition in drinking water cause methemoglobinemia ?

• A. > 50 ppm of nitrate
• B. > 50 ppm of chloride
• C. > 100 ppm of sulphate
• D. > 50ppm of lead

Answer 1

The correct option is A > 50 ppm of nitrate

The concentration of nitrate >50ppm in drinking water causes methemoglobinemia which is a blood disorder in which an abnormal amount of methemoglobin is produced.