A new report by Environment Texas finds plenty of pollution in the Trinity River.
The organization puts the Trinity in the top one-third of most polluted waterways in the state. It said most of the river running through North Texas is too polluted for activities like swimming, fishing or drinking.
Environment Texas says the problems come from riverfront development and dirty storm water runoff.
The group also claims companies are dumping chemicals into the rive, including lead, mercury and dioxin. Exposure to those chemicals is linked to cancer, reproductive disorders and developmental problems.
Environment Texas is urging the federal and local governments to act to protect the public health by upholding the storm water requirements in the Clean Water Act, doing more inspections of construction sites, and creating water-purifying wetlands along the Trinity River and near the Dallas Zoo.