What to know about the chemical spill at a water treatment plant in Missouri

The chemical spill in Missouri that caused a shutdown at the largest chemical plant in the country is being investigated by the Centers for Disease Control and Prevention, according to a report issued Tuesday.

The EPA said it will work with local authorities to determine how much of the compound leaked and what the effects will be on nearby communities.

The spill was caused when an industrial steam boiler that had been leaking used an acetylene torch to ignite chemicals and then leaked.

The fire, which burned for a little more than a minute, shut down the plant for two days.

The cleanup is expected to take weeks.

EPA spokesman Dan Stessel said the agency was also investigating the possibility of more leaks, as well as the potential for possible health risks to nearby communities, the AP reported.

Officials said in a statement Tuesday that the fire was the second chemical spill to affect the plants operations in the past three weeks, after another one was discovered by workers last month.

Officials are now looking into whether the second incident was related to the initial one, Stessel told the AP.

Officials have said the shutdown was necessary due to the spill, which occurred after a batch of nitrates leaked into the environment.

The chemical is used in cleaning and disinfection, but is considered a potential carcinogen.

The plant is located near a refinery and has been the site of several accidents.

It was shut down last week due to a threat to public health, but reopened Monday.