Nitrogen level in water

nitrogen in water

Nitrogen-containing compounds are found in surface waters in a dissolved, colloidal and suspended state and can change from one state to another under the influence of many physicochemical and biochemical factors. The average concentration of total nitrogen in natural waters varies considerably and depends on the trophicity of the water body: for oligotrophic it usually varies within the range 0.3-0.7 mg / dm3, for mesotrophic concentrations it is 0.7-1.3 mg / dm3, for Eutrophic - 0.8-2.0 mg / dm3 .

An increase in the concentration of ammonium and nitrite ions usually indicates fresh pollution, while an increase in the nitrate content indicates a contamination in the previous time. All forms of nitrogen, including gaseous, are capable of mutual transformations.