Heal The Bay’s Listing of the most polluted beaches.Avalon Harbor Beach in Catalina receives an F for the 4th time in 5 years.Most of the other Los Angeles County beaches received an A or B rating.Here’s the Beach Bummer’s list of the worst offenders: 1. Avalon Harbor Beach on Catalina Island (L.A. County) 2. Cowell Beach – at the wharf (Santa Cruz County) 3. Poche Beach (Orange County) 4. Cabrillo Beach harborside (Los Angeles County) 5. Malibu Pier (L.A. County) 6. Marina Lagoon (San Mateo County) 7. Doheny State Beach (Orange County) 8. Redondo Beach Pier (Los Angeles County) 9. Windsurfer Circle at Candlestick Point (San Francisco County) 10. Tijuana River Mouth (San Diego County)
