# Environmental crisis in Putumayo river basin

> Live situation record from CLSTR: https://clstr.news/situations/environmental-crisis-in-putumayo-river-basin
> Updated: 2026-10-06T19:10:37.000Z. Sources: 4. Developments: 2.

The Colombian Ombudsman's Office (Defensoría del Pueblo) has launched an investigation into environmental damage affecting the San Miguel and Putumayo rivers. Reports of fish mortality, offensive odors, and organic material accumulation have prompted requests for information from the Putumayo Governorate, local municipalities, and the environmental authority Corpoamazonia.

Authorities are investigating whether the contamination stems from extractive, industrial, agricultural, or livestock activities. The Ombudsman's Office has requested reports on water quality, sediment, and biological samples, while urging local governments to secure alternative sources of potable water for riverside communities that depend on these rivers for food and drinking water.

## Timeline

### 2026-10-06: Environmental and safety measures implemented in Mexico and Colombia

Authorities in Mexico have closed tourist sites in Huasteca Potosina due to dangerous river levels, while Corponor in Colombia suspended Geoambiental S.A.S. activities to protect the Agua Linda stream.

2 sources. https://clstr.news/cluster/environmental-and-safety-measures-implemented-in-mexico-and-colombia

### 2026-09-21: Putumayo rivers face environmental crisis amid fish deaths

Colombia's Ombudsman's Office has demanded action following reports of fish deaths and water contamination in the San Miguel and Putumayo rivers, affecting local communities and the Amazon basin.

2 sources. https://clstr.news/cluster/putumayo-rivers-face-environmental-crisis-amid-fish-deaths

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Cite as: Environmental crisis in Putumayo river basin. CLSTR, https://clstr.news/situations/environmental-crisis-in-putumayo-river-basin