Mexico is slated to dump around 400 million gallons of sewage into the Tijuana River, which will mostly likely flow into the United States, a decades-old problem that has posed environmental repercussions for beaches and communities, officials said.

Crews are slated to perform maintenance on the sewer system in Tijuana, which sits across the border from San Diego, which continues to be a dumping ground for Mexico’s pollution, San Diego Supervisor Jim Desmond told Fox News Digital.

“Every time there’s maintenance being done on their side of the border, instead of diverting it (sewage) to a treatment plant, it just goes into the river, the gullies and eventually ends up in the U.S., and into the ocean,” he said.