The conflict between the US and Mexico regarding the Colorado River revolves around water rights and the allocation of water resources from the river. The Colorado River is a major source of water for both countries, with the US relying heavily on the river for agricultural, municipal, and industrial purposes in states such as California, Arizona, and Nevada.
As part of various agreements between the US and Mexico, known as the Colorado River Compact and subsequent treaties, Mexico is entitled to a portion of the river's water for its own use. However, disputes have arisen over the years regarding the distribution of water between the two countries, particularly during times of drought or water scarcity.
Mexico has often criticized the US for allegedly taking more than its fair share of the river's water, leading to ecological and environmental concerns in Mexico, such as the drying up of wetlands and depletion of groundwater reserves. In recent years, efforts have been made to improve cooperation and collaboration between the two countries to ensure sustainable management of the Colorado River and equitable distribution of its water resources.