Houston-based Walter Oil and Gas Co. was fined $400,000 by a federal judge Thursday for failing to notify the National Response Center following a hazardous discharge in the Gulf of Mexico near Grand Isle.

The incident occurred in March 2014, court records show.

The company was charged last year in a one-count bill of information and pleaded guilty in December.

U.S. District Judge Nannette Jolivette Brown ordered a two-year probation period. The fine is to be divided four ways: $320,000 to the U.S. Treasury; $40,000 to the Louisiana Department of Environmental Quality; $30,000 to the Louisiana State Police Emergency Services Unit; and $10,000 to the Southern Environmental Enforcement Network.

“Our federal and state law enforcement partners are committed to protecting our environment,” U.S. Attorney Kenneth Polite Jr. said. “We will continue to demand that businesses not illegally pollute the waterways that sit at the center of our culture and economy.”