(KMOV)-- Missouri Governor Jay Nixon says the state will investigate why MSD did not report millions of gallons of raw sewage flowing into the Mississippi River.
The Metropolitan Sewer District speculates that a floating barge veered too close to the shoreline during high water last Thursday and damaged an underwater manhole structure. This may have blown out the pumps and forced more than 4.5 million gallons of untreated sewage per day to spill into the Mississippi River.
Flood waters are also hindering the ability to use emergency pumps.
The pump is now working properly. MSD is investigating what caused the leak.
The leak wasn't reported to the Missouri Department of Resources until Tuesday – five days after it started.
Still, not everyone down the river knows about the leak. Cape Girardeau says it is still waiting to be notified by the State Department of Natural Resources.
An MSD spokeswoman admitted the company made a critical mistake, and says the company will take corrective action.
The environmental impact of the sewage is not known, but it is believed that most of it has already moved down the river.
The question now is will MSD face fines from the state? Governor Nixon says an investigation will follow after the damage is assessed.
For breaking news alerts, text KMOVNEWS to 21321
Have you seen the forecast for tomorrow?
Get the latest St. Louis weather forecast
Governor Nixon says informing towns downstream from this spill is his first priority before he considers penalties against MSD.