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Semar Opens Probe After Dark Stain Appears on Río Pánuco Near Pemex Madero

Semar expands sampling and uses laboratory tests to identify the product’s origin and measure any environmental damage.

Overview

  • Local residents and media reported a dark, oil-like stain on the margin of the Río Pánuco next to the Terminal Marítima and Refinería Madero, prompting immediate local concern.
  • Pemex reported that it began surveillance, collected water samples in the canal de Varadero at multiple depths, and inspected storm drains it identified as possible sources.
  • The company said containment booms were deployed and that initial monitoring found no hydrocarbons in free phase, though further laboratory analyses are still pending.
  • The Secretaría de la Marina convened a multi-agency meeting with Semarnat, Profepa, Conagua and municipal officials to coordinate expanded sampling and agree next steps to determine origin and damage.
  • The incident raises fresh scrutiny of environmental oversight around major Pemex sites and could lead to broader audits or tighter monitoring if lab results show dissolved or particulate contamination.