Example Results

If a water sample contains 30 mg/L nitrate, NO3-, then it contains 6.78 mg/L nitrate nitrogen, NO3-–N.

This is less than the EPA recommendation of 10 mg/L of nitrate nitrogen, NO3-–N, in water.

6.78mg/L is less than 10mg/L N03-N
Animated illustration showing that our answer from the previous page's equation (6.78 mg/L N) is below the EPA's recommendation of 10 mg/L N.