Nitrate concentrations exceeding 44.3 mg NO3-/L are a concern in drinking water

Question

Nitrate concentrations exceeding 44.3 mg NO3-/L are a concern in drinking water due to the infant disease, methemoglobinemia. Nitrate concentrations are often recorded in units of NO3--N/L to be compared with other nitrogen constituents. Near three rural wells nitrate concentrations were reported as 0.25 mg NO3- -N/L, 8.7 mg NO3--N/L, and 27.3 mg NO3--N/L.
Do any of these three wells exceed the 44.3 ppm level?
NOTE: NO3--N/L is read as nitrate as nitrogen per liter.where we expresses methane concentrations as carbon dioxide as carbon per liter.

Explanation / Answer

0.25 mg NO3- -N/L = 0.25 mg/ 1000 ml = 250 mg / 10^6 ml = 250 ppm 8.7 mg NO3--N/L =8.7mg*1000/10^6 ml = 8700 ppm 27.3 mg NO3--N/L. = 27300 ppm So, yes all the three wells exceed the 44.3 ppm level.

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