Wanderlust World Wanderlust World Imperial Beach holds the unfortunate distinction of being the most polluted beach in San Diego County. Located just north of the U.S.-Mexico border, this coastal community faces severe water quality challenges driven by a combination of environmental and human factors.
The Tijuana River is the single largest contributor. It carries untreated sewage, industrial waste, and trash from Tijuana, Mexico, directly into the Pacific Ocean at Imperial Beach. Cross-border water infrastructure deficiencies exacerbate the problem, especially during heavy rains.
Additionally, the area's popularity as a tourist destination increases litter and local sewage output, further straining the marine environment.
Chronic pollution leads to frequent beach closures, posing health risks to swimmers and surfers and damaging the local ecosystem. Binational efforts between the U.S. and Mexico, including upgrades to wastewater treatment plants, are ongoing but have yet to fully resolve the issue.