Water contamination from oil extraction activities in Northern Peruvian Amazonian rivers

Raúl Yusta-García, Martí Orta-Martínez, Pedro Mayor, Carlos González-Crespo, Antoni Rosell-Melé

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Abstract

© 2017 Elsevier Ltd Oil extraction activities in the Northern Peruvian Amazon have generated a long-standing socio-environmental conflict between oil companies, governmental authorities and indigenous communities, partly derived from the discharge of produced waters containing high amounts of heavy metals and hydrocarbons. To assess the impact of produced waters discharges we conducted a meta-analysis of 2951 river water and 652 produced water chemical analyses from governmental institutions and oil companies reports, collected in four Amazonian river basins (Marañon, Tigre, Corrientes and Pastaza) and their tributaries. Produced water discharges had much higher concentrations of chloride, barium, cadmium and lead than are typically found in fresh waters, resulting in the widespread contamination of the natural water courses. A significant number of water samples had levels of cadmium, barium, hexavalent chromium and lead that did not meet Peruvian and international water standards. Our study shows that spillage of produced water in Peruvian Amazon rivers placed at risk indigenous population and wildlife during several decades. Furthermore, the impact of such activities in the headwaters of the Amazon extended well beyond the boundaries of oil concessions and national borders, which should be taken into consideration when evaluating large scale anthropogenic impacts in the Amazon.
Original languageEnglish
Pages (from-to)370-380
JournalEnvironmental Pollution
Volume225
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Amazon
  • Heavy metals
  • Oil pollution
  • Produced water
  • River water

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    Yusta-García, R., Orta-Martínez, M., Mayor, P., González-Crespo, C., & Rosell-Melé, A. (2017). Water contamination from oil extraction activities in Northern Peruvian Amazonian rivers. Environmental Pollution, 225, 370-380. https://doi.org/10.1016/j.envpol.2017.02.063