(2005). Colombia is well endowed with rich water resources with a national average fresh water supply of more than 2,100 cubic kilometers. This is several times larger when compared to other Latin American countries like Argentina and Mexico. These contaminants may result in cumulative and persistent consequences.
Mining sector process. Colombia is one of the largest producers of gold in Latin America. It has recently increased its production, especially in the Departments of
Antioquia,
Chocó,
Bolívar, and
Córdoba, which in 2014 produced 90% of Colombia's gold. The impact of gold mining on the environment mainly depends on the location of the metal and the methods used to extract it. Gold mining activities require high volumes of water to obtain the metal and this leads to an alteration in surface and underground water bodies. The major health risk from
artisanal mining is
mercury exposure. Among the emissions from artisanal mining, two thirds are released locally into soil and water near mining operations, and a third is released into the atmosphere, where it can potentially attack people far from mining sites too. This risks the health of workers but also those in the communities surrounding the processing centers. Few other studies show mercury contamination in plants, fish and sediments in some water bodies in the region of Mojana. In the region of Ayapel, significant concentrations of mercury in water, plants, fish and sediments swamp was found. Sources suggest that all the metal contaminations can be attributed to the mining activities on the main gold zone of Colombia and San Jorge River basin. Early life exposures are the most harmful as they can damage the whole brain.
Prevention Colombian government has been putting effort to reduce mercury usage levels. The adoption in July 2013 of Law 1658 to reduce and eliminate mercury use is an important step. It aims to phase out the use of mercury in all production processes within ten years and in mining within five years. Awareness has to be brought in miners regarding the risks involved in using mercury. The economic interests of the miners should also be safeguarded while protecting health and environment. Currently, the Government of Antioquia, Corantioquia, Universidad Nacional de Colombia and BioRedd are developing programs to help informal miners to improve their mining circuit and are introducing technologies that avoid mercury use in their process. == Government response ==