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.