The five samples were taken on July 16, 2025, in waters of different points of these water sources.
The Regional Autonomous Corporation of Los Ríos Negro and Nare (Cornare) delivered a report on the analysis carried out to Water from the Calderas and San Carlos riversin Antioquiathis after complaints received for possible discharges derived from illegal mining activities in the municipality of San Carlos.
The report indicates that, in two monitoring points on the boilers river they are detected Divalent mercury concentrations that exceed up to three times the maximum limits allowed by resolution 0631 of 2015.
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About the samples in the San Carlos Rivermercury concentrations are below the laboratory detection limit, so they are considered not quantifiable at that level of sensitivity. In conclusion, the analysis of the environmental entity identified the presence of mercury in the rivers of its jurisdiction.
Cornare reiterated that the possible source of pollution is associated with Open Sky Mining Activitiesidentified in the Calderas river basin.
The entity specifies that, according to Law 685 of 2001 (Mining Code), Direct competition to exercise control over these activities falls to the municipal mayorswho are the first mining authority in their territories.
According to cornare, The Corporation advances numerous operations in the region to meet the complaints of citizenship; However, because these actions also imply security aspects, the procedures are coordinated by the Police, the Army and the Government of Antioquiawhile Cornare participates to assess environmental effects and damage.
The environmental corporation ensures that, it will continue with The processes of monitoring, control and institutional articulation within the framework of the Management Table against Illicit Exploitation of mining deposits led by the Government of Antioquia.
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It also calls on the community to denounce any suspicious activity that compromises the quality of water sources. According to Cornare, Mercury is a highly toxic pollutant which can cause neurological damage, affect vital organs and put pregnant women and children even low concentrations.
“In aquatic ecosystems, bioaccumula is bioaccumula, altering the food chain and food security of communitiestherefore, these findings constitute an alert signal and demand immediate control and prevention actions. ”
Source: Integrated information system
