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A 2018 report from the Water Quality for Human Consumption Vigilance Information System (SISÁGUA, Brazil) showed the presence of 27 pesticides in Brazilian drinking water, of which 11 have carcinogenic potential. We assessed the data for 27 municipalities in Paraná state southwest, a rural landscape with high cancer rates. We selected data from the carcinogenic potential of 11 pesticides provided by international agencies (alachlor, aldrin-diheldrin, atrazine, chlordane, DDT, diuron, glyphosate, lindane, mancozeb, molinate, and trifluralin) and estimated the number of cancer cases attributable to drinking water contamination by pesticides. Also, we correlated such findings with incidence and mortality cancer rates for ten topographies obtained from the Brazilian National Cancer Institute (INCA) database. A total of 9 cities were selected, corresponding to about 81,000 people. All towns had all pesticides quantified in the drinking water. About ten cancer cases were attributed to drinking water contamination by pesticides in 2014–2017, mainly linked to diuron and mancozeb. Concerning the consolidated incidence of cancer cases reported by the INCA, significant correlations were found regarding aldrin-diheldrin, alachlor, and atrazine for breast cancer, atrazine for prostate cancer, and mancozeb and diuron for colon cancer, among others. Regarding the consolidated mortality rates, some correlations were found between DDT and trifluralin for the breast, DDT and lindane for the prostate, and glyphosate for lung cancer. Moderate correlations were found between the estimated and consolidated cancer cases for several topographies. Our findings highlight the correlation between drinking water contamination in Paraná state southwest and its increased incidence of cancers with poor prognosis.
A 2018 report from the Water Quality for Human Consumption Vigilance Information System (SISÁGUA, Brazil) showed the presence of 27 pesticides in Brazilian drinking water, of which 11 have carcinogenic potential. We assessed the data for 27 municipalities in Paraná state southwest, a rural landscape with high cancer rates. We selected data from the carcinogenic potential of 11 pesticides provided by international agencies (alachlor, aldrin-diheldrin, atrazine, chlordane, DDT, diuron, glyphosate, lindane, mancozeb, molinate, and trifluralin) and estimated the number of cancer cases attributable to drinking water contamination by pesticides. Also, we correlated such findings with incidence and mortality cancer rates for ten topographies obtained from the Brazilian National Cancer Institute (INCA) database. A total of 9 cities were selected, corresponding to about 81,000 people. All towns had all pesticides quantified in the drinking water. About ten cancer cases were attributed to drinking water contamination by pesticides in 2014–2017, mainly linked to diuron and mancozeb. Concerning the consolidated incidence of cancer cases reported by the INCA, significant correlations were found regarding aldrin-diheldrin, alachlor, and atrazine for breast cancer, atrazine for prostate cancer, and mancozeb and diuron for colon cancer, among others. Regarding the consolidated mortality rates, some correlations were found between DDT and trifluralin for the breast, DDT and lindane for the prostate, and glyphosate for lung cancer. Moderate correlations were found between the estimated and consolidated cancer cases for several topographies. Our findings highlight the correlation between drinking water contamination in Paraná state southwest and its increased incidence of cancers with poor prognosis.
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