UNICAMP research, which extended for two years, aimed to identify a trend of contamination in different regions
A (Unicamp) study brought to light a worrying discovery: the presence of 14 types of pesticides in rainwater in cities such as Sao Paulo, Campinas and Brotas. Under the coordination of Professor Cassiana Montagner, the research is part of a broader survey on the use of pesticides in sugarcane culture, a sector in which the state of São Paulo stands out as the largest producer in Brazil and one of the world leaders. Contamination occurs when pesticides applied to the plantations disperses in the atmosphere, especially during spraying, and end up being transported by the rains.
The study, which extended for two years, aimed to identify a trend of contamination in different regions, avoiding conclusions based on specific occurrences. Among the pesticides detected, four have carcinogen potential, and some are already prohibited in Brazil. Professor Montagner clarifies that the presence of these compounds in rainwater does not pose an immediate risk to human health unless there is prolonged exposure. It highlights the urgent need to update regulations, which are often based on outdated toxicity studies, such as Rio water standards, dating from 2005.
In addition, the survey draws attention to the nearly 20% increase in approving new pesticides in Brazil last year, totaling more than 500 products released. The Secretariat of Agriculture and Supply of the State of São Paulo stated, in a statement, that continues monitoring of the use of pesticides through a state program, overseeing agricultural activities to ensure compliance with sustainable legislation and practices. Control on the prohibition and release of these products is jointly done by the Ministry of Agriculture, Anvisa and Ibama.
