Hello! Watermelon poisoning can occur for two reasons. The first: due to the violation of integrity or improper / long-term storage of watermelon accumulated harmful microorganisms. The second: increased nitrate content caused by improper use of nitrogen fertilizers. Fertilizers of this type can accumulate in the soil, turn into groundwater, concentrate in agricultural products, mainly in greens, cucumbers and watermelons. Nitrogen contributes to the growth of green mass, so they are widely used to stimulate plant growth. In humans, nitrates become more toxic nitrites. It should also be borne in mind that the chances of poisoning watermelon with nitrates are much higher in July (early harvest), and at the end of the season more likely to suffer from "fermented" berries. On the basis of FSBI CNMVL, it is possible to conduct a study of vegetables and fruits on the content of nitrates in them, as well as on other safety indicators in accordance with the current regulatory documents.