The Arroyo Colorado Watershed
Located in the Lower Rio Grande Valley of South Texas, the Arroyo Colorado Watershed extends about 90 miles from Mission and drains into the Laguna Madre.
What is a watershed?
An area of land that drains water to a common waterway, such as a stream, lake, or ultimately, the ocean. All land surfaces on Earth are within a watershed.
What is a Watershed Protection Plan (WPP)?
A framework for managing water resource quality and quantity within a specified watershed.
What are the goals of the Arroyo Colorado WPP?
Reduce pollutants entering the Arroyo Colorado to the maximum extent possible to meet state water quality standards and improve the natural terrestrial, riparian, and aquatic habitat.
What is the Arroyo Colorado Watershed Partnership?
» A gathering of federal, state, and private organizations that seek to improve watershed health in the Arroyo Colorado, focusing on issues of water quality, flooding, drainage, wildlife habitat, and water quantity.
Recent News
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Arroyo Colorado Watershed Partnership meeting – Weslaco
December 4, 2025, Weslaco, TX Arroyo Colorado Watershed Partnership meeting – Weslaco The next Arroyo Colorado Watershed Partnership meeting is right around the corner on December 4 at 9:30 AM. The meeting will be held at the Weslaco AgriLife Research and…
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Meet the New Arroyo Colorado Watershed Coordinator: Samantha Colunga
Samantha Colunga was born and raised in the Rio Grande Valley and grew up in Monte Alto, Texas. Throughout elementary and middle school in Monte Alto, Samantha always enjoyed science, hoping to one day become a marine biologist. Her dream…
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Arroyo Colorado Watershed Boundary Update Planned for Early 2026
By Lucas Gregory During stakeholder meetings for the 2017 Update to the Arroyo Colorado WPP, the accuracy of the watershed boundary used in the WPP was questioned. This boundary was delineated using digital elevation models (topography) available at the time.…
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