U.S. Rep. Brad Miller is introducing a bill that would give Department of Veterans Affairs benefits to anyone exposed to contaminated water at Camp Lejeune.

Miller's bill would be a companion to one already filed by U.S. Sen. Richard Burr, a Winston-Salem Republican, the AP reports.

Miller, a Raleigh Democrat, has held hearings on the issue.

Health officials say it is impossible to know how many people would qualify. They think as many as 1 million people may have been exposed to the toxins before tainted wells were closed 22 years ago.

Previously, Burr and Sen. Kay Hagan, a Greensboro Democrat, amended a defense spending bill with a provision that would prevent the Navy from ending claims about the contamination until the health consequences are fully studied. 

U.S. Sens. Kay Hagan and Richard Burr are pushing a measure that would force the Navy to hold off on disposing of claims about water contamination at Camp Lejeune.

The amendment to a defense appropriations bill must still survive a conference with the House.

From 1957 to 1987, the water at Lejeune was contaminated with toxins at concentrations up to 280 times what is currently considered safe by the Environmental Protection Agency and may have contributed to health problems faced by Marines and their families, according to Hagan's office. As many as 1 million people may have been exposed to tainted water.

The bill would halt efforts to dispose of claims filed by those families until the Centers for Disease Control and Prevention completes studies of the health effects of the water contamination.

"Our amendment makes the desire of the Senate perfectly clear: the Navy should not dispose of claims until the scientific studies are complete,” said Hagan, a Greensboro Democrat and member of the Senate Armed Services Committee. "Marines and their families, who were exposed to dangerous chemicals in the Camp Lejeune drinking water over several decades, deserve to know how that exposure impacted their health.”

In July, Burr and Hagan introduced a bill that would open access to Department of Veterans' Affairs health care for veterans and their family members that lived on the base during the years of water contamination.