San Diego's Imperial Beach Named Most Polluted in U.S..

Surfrider Foundation's report highlights severe contamination affecting public health and local economies.

Imperial Beach in San Diego showed 100% of samples exceeding state health standards.
The pollution stems from untreated sewage and stormwater runoff from the Tijuana River Watershed.
Other highly polluted beaches include Linda Mar Beach and San Luis Creek Mouth in California.
Contamination has led to beach closures and increased funding for water treatment projects.
Pollution affects both water and air quality, causing health issues for local residents.