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Quality of Life

Wastewater flows out of pipe and polluted foam clouds float on top of the Tijuana River in the Nestor neighborhood of San Diego, California on April 16, 2025.
Melissa Mae
/
KPBS
This week's high heat, combined with untreated wastewater flows from Mexico in the Tijuana River Valley, have led to elevated hydrogen sulfide emissions which cause a rotten egg smell.
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