As temperatures soared to record levels and officials issued warnings about the heat wave sweeping San Diego, hydrogen sulfide levels in and around the Tijuana River have also spiked. At the same time, bacterial levels are also high. The Tijuana River Coalition issued a press release on Friday calling for a “timely and reliable” alert system to warn residents of contamination spikes and for better coordination among public agencies to connect residents and schools with information that could help people protect their health. … Water contaminated with sewage and chemicals flowing into the Tijuana River has remained high for the dry season, flowing at 30 to 40 million gallons a day.

Other Tijuana River news:

• San Diego Union-Tribune: Heatwave amplifies border pollution, pushes hydrogen sulfide to highest levels since 2024
• KPBS (San Diego): High heat, broken pump lead to elevated ’sewer gas’ smells in South Bay
• San Diego County: News release: Excess heat raises Tijuana River Valley hydrogen sulfide emissions, health precautions recommended