No menu items!

COSTA RICA'S LEADING ENGLISH LANGUAGE NEWSPAPER

HomeNewsCosta RicaMercury contaminating Crucitas water, threatening ecosystems, warns UNA study

Mercury contaminating Crucitas water, threatening ecosystems, warns UNA study

A recent study by the National University (UNA), through its Institute for Studies on Toxic Substances, warned of a “very probable” and “significant” affectation of aquatic ecosystems at Crucitas, which has been contaminated by mercury used by illegal mining groups to extract gold from the area.

The institution took samples of fish, plants, water and sediments, inside and outside the areas that are being used for illegal mining (from the Caño Crucitas micro basin and the lower Infiernito river basin to its mouths in the river San Juan), igniting alarms about a probable and “important affectation of the aquatic ecosystem, both local and downstream.”

According to the preliminary study, dated Sept. 19, “the highest levels (of mercury) were present in the samples taken directly in the impact areas.” However, “the high removal of soil material, the expansion of the water bed by the amount of sediment in suspension, the release of organic matter, all in combination with heavy rains in the area, would generate a displacement of mercury” in the zone.

The study was carried out at the request of the Ministry of Environment and Energy, and the objective was “to identify the presence of mercury in the affected area.”

The report says it will seek to “a second phase of long-term monitoring of the environmental behavior of biota, water and soil, as well as of residents in direct or indirect contact with the metal” to “identify the areas of greatest risk and to support with scientific data the actions of the state entities.”

Concerns about health impacts in the area have existed since the beginning of 2017, when the presence of non-sanctioned mining groups in the area increased.

Crucitas was the planned mine location for Canadian company Infinito Gold during the administration of President Óscar Arias. However, that initiative was suspended in 2010 after pressure from activist groups, academics and environmentalists, who questioned the imminent environmental impact a gold mine would have in the country.

However, the territories are now overrun by amateur gold-seekers, who use mercury to amalgamate the gold they extract from the stone fragments in the area.

The UNA report says mercury is “a highly toxic metal, both due to its easy migration between different environmental behaviors, as well as its persistence and ability to bioaccumulate, biomagnify and to form organic compounds.”

This, warns the document, is a “potential risk” for birds, otters, sloths and other species that feed on affected fish and plants, whose exposure to mercury — once ingested — can cause behavioral disorders and health problems.

In addition to all these damages, the specialists of the UNA determined that the gold miners generate other environmental damages in the surrounding wetlands, where they wash rocky material in the gorges, undermine roots of the trees, widen channels 10 times or more their original width, remove substrates and leave plastic trash.

The report was released on in mid-December by the faction of the National Liberation Party (PLN) in the Legislative Assembly, where its head, Carlos Ricardo Benavides, denounced “the attention of the current authorities” who feel the results of “the previous government, which allowed hundreds of illegal gold minders to enter that area and have been amassed large businesses through illegal extraction.”

Semanario Universidad Logo

This story was originally published by Semanario Universidad. It was translated with permission by The Tico Times. Read the original report here.

Trending Now

Why Costa Rica Feels Like a Safe Haven for This Longtime Expat

If someone asked me to sum up why I live in Costa Rica in 5 words or less, my answer could well be: “It...

Climate Change in Costa Rica Devastates Coffee Farms in Los Santos

In Costa Rica’s Los Santos region, famous for producing nearly half the country’s coffee, farmers are reeling from heavy losses driven by wild weather....

Costa Rica to Launch Electric Air Taxis for Sustainable Travel in Guanacaste

Costa Rica is poised to revolutionize its transportation landscape with the introduction of electric air taxis, offering a sustainable alternative to traditional ground travel...

Costa Rica’s Pride March 2025 Defies Restrictions and Celebrates Diversity

A large crowd gathered in Paseo Colón, San José, to participate in the LGBTIQ+ Pride March 2025. It began at noon, as people marched...

Costa Rica and Panama Seek Gold Cup Glory Against North American Giants

With no Caribbean teams advancing, a Central American contingent made up of Panama, Costa Rica, Honduras, and Guatemala heads into the quarterfinals of the...

A Costa Rica Love Story: From Rustic Cabina to Separate Dreams

My Tica wife and I have been together for over a quarter century. When we met, I was living a simple life here. Three...
spot_img
Costa Rica Tours
Costa Rica Coffee Maker Chorreador
Costa Rica Coffee Maker Chorreador
Costa Rica Travel Insurance
Costa Rica Rocking Chait
Costa Rica Travel

Latest News from Costa Rica