Protecting water quality while maintaining productive agricultural land is an ongoing challenge for many farmers and landowners. Cox Ranch, a 155-acre property located along the San Joaquin River, demonstrates how restoration-based best management practices can successfully reduce agricultural runoff while supporting healthy ecosystems and sustainable land stewardship.
Through multiple funding partnerships—including an Emergency Watershed Protection (EWP) conservation easement and the U.S. Fish and Wildlife Service’s Partners for Wildlife Program—Cox Ranch developed and constructed a treatment and conveyance system designed to move water strategically between wetland, upland, and riparian habitats across the property.
The goal of the project was to improve the treatment of agricultural tailwater runoff before it reached surrounding waterways. Tailwater often contains sediment, nutrients, and other pollutants that can negatively affect water quality downstream. During its first year of operation, the Cox Ranch system effectively demonstrated its ability to remove silt from agricultural runoff, helping reduce sediment pollution entering the San Joaquin River watershed.
Restoration-based water treatment systems work by slowing water movement and allowing natural processes to filter and improve water quality. Wetlands and riparian areas can capture sediment, absorb nutrients, and support beneficial wildlife habitat at the same time. These natural systems provide environmental benefits while helping growers meet California water quality standards.
The Cox Ranch case study is part of a broader effort to provide landowners with practical resources and examples of successful best management practices for agricultural runoff management. Projects like this show how conservation and agriculture can work together to create healthier watersheds and more resilient farming systems.
As water quality concerns and environmental regulations continue to grow, restoration-focused land management strategies are becoming increasingly valuable tools for sustainable agriculture.
Protecting rivers, wetlands, and farmland often begins with innovative partnerships and thoughtful stewardship practices that benefit both the land and the communities that depend on it.