Texas drinking water supplies are starting to leak, prompting a new state of emergency to address the situation.
The state is asking residents to avoid drinking water that is acidic or has any levels of nitrates or nitrites.
The Associated Press reported on Monday that the U.S. Environmental Protection Agency has issued a public health alert that warns that the problem could be severe.
Toxicology tests show that at least two people have died and more than 100 have been hospitalized from water contamination.
State health officials said they expect to get reports of the contamination within the next 48 hours, AP reported.
Tests revealed elevated nitrates in drinking water at the Dallas-Fort Worth International Airport, according to the AP.
Statewide, nitrates have been found in more than 300,000 drinking water samples taken since September.
The problem was first reported in Texas in February, but the state has not identified the source of the problem, and it is not clear if it is related to the spill in Fort Worth.
It is one of the worst water pollution incidents in Texas history.
A state study earlier this year found that nearly half of all residents in Texas have elevated nitrate levels in their urine.