Sewage contamination continues to be an issue in the Tijuana River Valley, but much has improved in recent decades. International partnerships and the development of the South Bay International Wastewater Treatment Plant have largely limited sewage contaminated flows to the rainy season. During drier summer months, there is very little flow and the estuary remains one of the healthiest coastal wetlands in the region.
In addition to sewage pollution there is growing concerns of excessive sediment, trash, and invasive species. These are being actively addressed through programs such as the Tijuana River Valley Recovery Team and SWIA’s invasive plant program.