Walmart was fined $82 million for not properly handling hazardous waste in two states.
They have pleaded guilty to seven counts of violating environmental laws in California and Missouri after a ten-year-long legal battle.
Police found that the company staff was disposing of products like bleach and fertilizer by pouring it out into the sink or throwing it in a bin.
Walmart was charged with six counts of violating the Clean Water Act in California and one count of violating a federal law related to pesticide disposal in Missouri.
Though $82 million sounds like a lot, to Walmart it is only a small hole in their billion dollar a year revenue. Last year, they made $128 billion.
"Retailers like Walmart that generate hazardous waste have a duty to legally and safely dispose of that hazardous waste, and dumping it down the sink was neither legal nor safe," Andre Birotte Jr., the U.S. attorney for the Central District of California, said.
"Walmart put the public and the environment at risk and gained an unfair economic advantage over other companies."
The company has changed their disposal rules and is now training their staff to properly dispose of hazardous waste.
"Once we learned of these allegations, we looked into it, investigated it, and decided to put this program in place, so they know if something is determined as hazardous waste," Spokeswoman Brooke Buchanan said.