Rumor: Drinking [thousands of boiling water] will lead to nitrite poisoning.
Truth: No, if the repeatedly boiled water really cannot be drunk, how dare you drink all kinds of old fire soup?
Commonly known as “thousands of boiling water”, refers to boiling water for a long time or repeatedly boiling water.
Indeed, tap water contains nitrate and nitrite, and after repeated boiling, some nitrates will be converted into nitrite due to high temperature and lack of oxygen.
However, tests from the laboratory show that:
The nitrite content in tap water is 0.007 mg/L, 0.021 mg/L after boiling once and 0.038 mg/L after boiling 20 times. After boiling many times, it is still far lower than the national standard for drinking water (≤ 1 mg/L) and is completely safe.