UPDATE: The Office of the City Manager for Midwest City released more information on Monday evening about the level of contamination.
On social media, the office says the Trihalomethane level found in the drinking water was 0.084 for no longer than 60 days, from August to September.
The normal level is 0.080 or lower.
"Once the city learned of the high level, on or around Oct. 1, it immediately took measures to correct the situation. As a result, on or around Nov. 1, the level trihalomethane in the city drinking water was tested and results showed it was well below 0.040," the office' Facebook page said.
City leaders say since there was no immediate danger or emergency to the public, the city had to wait on the EPA to release the notice.
"Please know that if and when there is ever an emergency situation that affects the public, the city will make that information known immediately," it said.
City leaders say health complications only occur after years of consumption.
They say the water has returned to its normal state.
MIDWEST CITY, Okla.- A Midwest City woman, who says she only has months to live, is now worried about the water coming through her faucet.
She recently received a letter from the city saying there were dangerous chemicals in the water.
She says the city has known about the problem since August, but are just now warning the public.
"It could have decreased my life span and it scares me," said Karen.
Karen says she is terminally ill and is forced to take 15 medications each day and drink about a gallon of water.
Last week, she says she received a letter from the city, saying there are dangerous levels of Trihalomethanes, a by-product of chlorine, in the drinking water.
"There's a lot of people out there in the same shoes, and it deeply concerns me," Karen said.
The chemical has been linked to health problems in people with immune problems, the elderly and infants.
"It can cause cancer, it can cause further liver damage, which I already have," Karen said.
Karen says she spent four months drinking the contaminated water and the city did not notify the public.
"I can't believe that the city would wait so long to notify us. They should have notified us within 30 days and let us know that there was something wrong with the water," Karen said.
"If there's someone out there that says that we were holding onto information too long before we got it out, that's not true. We don't put that information out until we're ordered to do so," said Bill Janacek, the Midwest City director of environmental services.
According to the law, even if the city knows the levels exceed the maximum, city leaders do not have to warn the public until 30 days after the Department of Environmental Quality orders them to do so.
"Betrayed, I feel real betrayed by the city," said Karen.