South Bay September 11, 2024 4:11 pm South Bay residents worried over air quality from Tijuana River sewage crisis Researchers say the air around the Tijuana River is dangerous, while county leaders say they have not seen the evidence. NBC 7’s Joe Little reports. US & World Videos 2:15 Sweetwater Union high school students receive CPR training 3:01 IBWC holds public meeting in Coronado on Tijuana Valley sewage crisis 2:21 Breeders' Cup to generate about $150M for San Diego County economy 2:56 Mobile air monitoring vehicle to detect toxic gases near Tijuana River Valley 2:43 Program offers some Mesa College grads guaranteed admission to HBCUs