Effects of nitrate and nitrite in drinking water on the body:
Nitrites are important because of the development of methemoglobin in humans.
In this disease, the oxygen content in the blood decreases and the skin of the face becomes darker especially around the eyes. Nitrite may be present in the water, especially in water springs exposed to chemical fertilizers around the surrounding area.
The Iranian National Bureau of Expressions of Excellence (ICAO) has reported the maximum nitrite in drinking water at 0.1 mg per liter.
But it is noteworthy that nitrates are converted into nitrite in the human digestive system, and the excessive nitrate in water is completely debatable, and the Iranian Bureau of Standards has stated the maximum intake of 50 mg per liter, and if the nitrate content exceeds 10 mg / The phrase "Not suitable for infants" should be written on the label.