What is the Nitrate MCL expressed as?

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Prepare for the ADEQ Water Treatment Grade 4 Exam. Benefit from multiple choice questions, real-life scenarios, and detailed explanations. Boost your chances of success!

Multiple Choice

What is the Nitrate MCL expressed as?

Explanation:
Nitrate limits in drinking water are expressed as the amount of nitrogen in the nitrate, not as nitrate itself. The Nitrate MCL is 10 mg/L as N, meaning the concentration is given in milligrams of nitrogen per liter. The “as N” notation tells you to express the value in terms of nitrogen content. If you convert 10 mg/L as N to nitrate (NO3−), it would be about 45 mg/L as NO3−. So the correct expression is 10 mg/L as N.

Nitrate limits in drinking water are expressed as the amount of nitrogen in the nitrate, not as nitrate itself. The Nitrate MCL is 10 mg/L as N, meaning the concentration is given in milligrams of nitrogen per liter. The “as N” notation tells you to express the value in terms of nitrogen content. If you convert 10 mg/L as N to nitrate (NO3−), it would be about 45 mg/L as NO3−. So the correct expression is 10 mg/L as N.

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