Rep. Bennie Thompson (D-Miss.) is calling on the Department of Homeland Security (DHS) to look into a report that residents of Puerto Rico are drinking water that may be contaminated.

Thompson wrote a letter to acting DHS Secretary Elaine Duke asking for an investigation, CNN reported.

"Reports of Puerto Ricans waiting hours to receive potentially contaminated water that could have long-term health consequences is beyond disturbing," Thompson said Saturday.

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"That it happened on days after EPA warned the people of Puerto Rico to refrain from breaking into Superfund sites to access water suggests a troubling breakdown in coordination among the federal entities playing a role in federal disaster response activities. "

The request comes after CNN reported that some Puerto Rico residents are turning to a hazardous waste site for drinking water as the island continues to reel from Hurricane Maria.

More than three weeks after Hurricane Maria tore across the island, many residents remain without access to clean drinking water.

According to CNN, some people are seeking water from potentially risky sources, including the Dorado Groundwater Contamination Site, an area designated by the Environmental Protection Agency (EPA) as a so-called Superfund site.

The Trump administration has been criticized for its response to the devastation in Puerto Rico.

Last week, Trump warned that his administration's response to Puerto Rico couldn't last forever.

"We cannot keep [the Federal Emergency Management Agency], the Military & the First Responders, who have been amazing (under the most difficult circumstances) in P.R. forever!" Trump wrote in a series of tweets.