New rules limiting clean water protections ignore stream science

New rules limiting clean water protections ignore stream science

News Type: Federal Source: High Country News
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On Dec. 11, the Trump administration announced plans to cut back the number of wetlands and creeks protected under the Clean Water Act, which regulates water pollution in the U.S. The new rules would leave about half the nation’s wetlands and all of its ephemeral streams — those waterways, common in the West, that flow only after rainfall or snowmelt — without federal safeguards.

The proposed guidelines, which will almost certainly face years of lawsuits, are a stark departure from how previous administrations have interpreted the act — and a sharp divergence from research on how to protect clean water. The Environmental Protection Agency and the Army Corps of Engineers argued that the new rules were informed by science. But the agencies did not conduct a new scientific assessment of which waterways the Clean Water Act should cover; instead, they relied on a comprehensive report prepared by the EPA in 2015. That report, on how streams and wetlands are connected to downstream waters, highlights the importance of the very waterways the new guidelines would leave unprotected.

High Country News recently caught up with Ellen Wohl, a river researcher and professor at Colorado State University who served on the scientific review committee for the 2015 EPA report, to find out how scientists view the new guidelines.