The Trump administration is proposing to redefine a key term in the Clean Water Act: “Waters of the United States.” This deceptively simple phrase describes which streams, lakes, wetlands and other water bodies qualify for federal protection under the law.
Government regulators, landowners, conservationists and other groups have struggled to agree on what it means for more than 30 years. Those who support a broad definition believe the federal government has a broad role in protecting waters – even if they are small, isolated, or present only during wet seasons. Others say that approach infringes on private property rights, and want to limit which waters count.
I study rivers, and served on a committee that reviewed the science supporting the Obama administration’s 2015 Clean Water Rule. This measure, which defined waters of the United States broadly, is what the Trump administration wants to rewrite.
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