At a Glance

At least two sites have been inspected by the EPA.Six others have been cleared in Iowa, Nebraska and Missouri. The agency emphasized that it could find no evidence of that any hazardous contaminants were released.

Midwestern flooding from recent bouts of heavy rain and snowmelt impacted at least two Superfund sites but no public health advisories or alerts have been issued, the Environmental Protection Agency said Wednesday.

In an email to weather.com, the agency said it was that were directly impacted by the flooding: the Nebraska Ordnance Plant, in Mead, Nebraska, and the Conservation Chemical Corporation, in Kansas City, Missouri.

"At the Nebraska Ordnance Plant, floodwaters rendered portions of the ," the EPA said in a Tuesday press release. "Shutdown of the groundwater treatment plant and extraction wells was necessary for approximately two days, due to access issues. The treatment plant and all wells are up and running again."

The former munitions plant disposed of radioactive waste and other chemicals between 1942 and 1956, leading to groundwater contamination.

"Because the contamination being addressed at the site is in the groundwater, exposure to contamination as a result of floodwater is not expected," the agency told weather.com.

"Groundwater is beneath the surface, generally at depth in the aquifer," EPA spokesman Ben Washburn further explained to weather.com. "Given that it is at depth, there is generally no exposure to [the flooding]."

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A second Superfund site, the Conservation Chemical Corporation, partially flooded when the Missouri River topped its bank near the location.

"In response, the site’s Potentially Responsible Parties, under EPA oversight, successfully increased the pumping rate of the groundwater treatment system to account for impacts from floodwaters," the EPA said.

"During this flood event, water is present inside the perimeter fence but remains isolated from and does not cover soil above the in-place hazardous waste," the agency added.

The EPA emphasized that it could not find evidence that any hazardous contaminants were released by the flooding.

In addition, the agency says it has been monitoring 6 other sites, two of which had water on the properties but did not require any actions, both in Iowa. Four others in Nebraska, Iowa and Missouri were "not impacted by floodwater but have limited access due to flooded roadways."

"In coordination with our state and local partners, we will continue to monitor the floodwaters and the sites closely in the days ahead," the agency said, adding that "no immediate actions are required at these sites."

Superfund is a law that provides EPA funding and authority to clean up contaminated sites.