WASHINGTON — The landmark U.S. law to fight water pollution will now apply only to bodies of water large enough for boats to use, and their adjacent wetlands, and will not automatically protect streams, the U.S. government said on Tuesday. Environmental groups said they fear the new policy will muddy the purpose of the federal Clean Water Act and put many smaller bodies of water at risk. Democrats in Congress have introduced legislation mandating protection of creeks, estuaries and other watersheds. The Environmental Protection Agency and the Army Corps of Engineers wrote the new guidelines after the Supreme Court split a year ago in a case about which waters fall under the Clean Water Act. Because of the split decision, lower courts must decide on a case-by-case basis if the law applies to smaller water areas. Four justices said the law was restricted to protecting navigable waters such as lakes and rivers, and bodies connected to them, while four argued the law had a broader reach. The new guidelines were intended to help workers in the field determine if a waterway fell under the act, using the argument of Justice Anthony Kennedy, who did not […]