U.S. Rep. Raul Grijalva was among those who spoke in opposition to a resolution altering rules on mine waste dumping.
The resolution, which loosens restriction on mountaintop mining companies, allowing them to fill mountain valleys that act as waterways, passed 229-192.
The George W. Bush administration put a similar rule in place in 2008, but a challenge by the National Parks Conservation Association led to the rule being overturned last month.
“With water being such a finite resource in Arizona and the desert...any risk to lessening the availability of water, to both human consumption and for legitimate industries, I think is something we all have to be concerned about," Grijalva said.
The measure now goes to the Senate.