A database built by Mongabay Latam, based on the analysis of scientific studies that gathered more than 7,000 samples from humans and 5,900 from fish, identified the areas most affected by mercury contamination in the Madeira River, one of the main tributaries of the Amazon.Mongabay Latam investigated the impact of mercury contamination on the health of the most affected communities: Lake Puruzinho in the state of Amazonas, and the riverside community of Calama and the Karipuna Indigenous Territory, in Rondônia state.Studies show that mercury concentrations among residents of Lake Puruzinho are among the highest recorded in the Madeira River Basin and well above what the World Health Organization considers safe, prompting residents to change their eating habits.High levels of mercury in Amazonian communities are related to fish consumption, their main source of protein; the accumulation of mercury in humans can cause serious health damage, such as motor and neurological problems, researchers say.
LAGO DO PURUZINHO/KARIPUNA INDIGENOUS TERRITORY/CALAMA, Brazil — The Lake Puruzinho community sits on a clear, fish-rich lake in the Brazilian Amazon, an area that, at first glance, resembles paradise. Just 20 kilometers (12 miles) from the city of Humaitá in Amazonas state, the community is soundtracked by two contrasting noises: the song of birds like the crested oropendola as it flies in search of fruit, and the thunderous engines of vessels plying the Madeira River.
