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Mercury poisoning in Peru’s Amazon region threatens health catastrophe

Loreto, Peru: Illegal gold mining pollutes the region

Nearly 80 percent of the population has mercury levels that are unsafe

Most at risk are pregnant women and children

By Dan Collyns

Test results revealed this month showed that nearly 80% (of those tested) had mercury levels far above the safe limit in six communities along the Nanay River and Pintuyacu River.

Jairo Reategui davila, Apu or leader of San Antonio de Nanay - one of the communities tested - said that the majority of its population was contaminated.

He said, "We are concerned and we want the authorities to act."

Results showed that 37% of 273 men and women tested had mercury levels in their hair exceeding 10 ppm. This is compared to only 3% of those who were below the safe limit of 2.2 ppm set by the World Health Organization.

Gold prices are up nearly 50% over the past year. This is a record-breaking increase, which has encouraged a flourishing gold mining industry that damages local biodiversity and nature, as well as raising serious health concerns.

Claudia Vega is the head of CINCIA's mercury program. She said that illegal miners use toxic mercury to extract gold from river silt, and then burn it off. The vapour produced by the burning turns into a poisonous gas, which is absorbed in the soil, plants and rivers.

Mercury poisoning can cause a variety of health problems, including cognitive impairment and learning disabilities in children and infants.

Gabriel Barria is the regional coordinator of heavy metals at the local health authority. He said that it was "very unfortunate" that the villagers had been highly contaminated. He blamed mercury levels in Amazonian rivers on the illegal gold mining.

He stated that the health authority didn't have the budget for tests to detect mercury. Only 12 people were tested during a recent visit by the health authority using blood and urine samples.

EXCEEDING LIMIT

CINCIA reported that tests showed an average level of 8.41 ppm. This is nearly four times higher than the WHO limit.

There are currently no studies that have been conducted on the health effects of illegal mining on Loreto's local population.

The levels found in these first tests are higher than the average levels of mercury in 2012 in Madre de Dios in Peruvian Amazon, the region most affected by illegal gold-mining.

Luis Fernandez is the executive director of CINCIA, and a Research Professor at Wake Forest University. He said that if illegal mining in Loreto continued, then villages with high mercury levels could begin to move closer to those living near the worst case of mercury contamination.

Minamata Bay is a case that was well-known in Japan during the 1950s. Children were born with neurological disabilities and congenital deformities as a result of a chemical plant dumping mercury in the water for years.

Vega, the CINCIA researcher who conducted the study, stated that the results revealed "background" mercury levels in Loreto's riparian communities.

She said that it was impossible to determine if the mercury in the water came from natural sources or from human activities such as illegal gold mining. However, she did say it was mainly caused by the villager's diet of fish.

She said that "several scientific studies have shown that mining in a particular area tends to increase the mercury levels in the surrounding environment".

According to the newly published study, people are mainly exposed methylmercury. This highly toxic form accumulates in our bodies.

(source: Reuters)