US supreme court shrinks clean water protections in ruling siding with Idaho couple

Ruling by conservative-dominated court shrinks scope of landmark law to protect America's waterways

The scope of a landmark law to protect America's waterways has been shrunk by the US supreme court, which has sided with an Idaho couple who have waged a long-running legal battle to build a house on wetlands near one of the state's largest lakes.

In a ruling passed down on Thursday, the conservative-dominated court decided that the federal government was wrong to use the Clean Water Act, a key 50-year-old piece of legislation to prevent pollution seeping into rivers, streams and lakes, to prevent the couple building over the wetland beside Priest Lake in Idaho.