… Pollution in the [Tijuana] river has been an entrenched environmental crisis for decades, with all sides pointing fingers at one another. Residents blame politicians for failing to find a solution. Local politicians blame Congress for not funding improvements in the South Bay International Wastewater Treatment Plant, which processes raw sewage from Tijuana. The federal government blames Mexico for lax sewage regulations. The International Boundary and Water Commission says it’s not its job to collect the wastewater from unknown sources that flows into the Tijuana River. Complicating matters further: Researchers and county officials are sharply split on whether the stench is simply a nuisance or a danger to public health. Some help is on the way, potentially. Mexico’s new wastewater treatment plant is set to open this month, and there are plans to double the capacity of the South Bay International Wastewater Treatment Plant, although that project will take five years.