San Diego County beaches earned nearly one-fourth of the spots on Heal the Bay’s annual Honor Roll for excellent year-round water quality, according to the environmental group report released Tuesday.

According to Santa Monica-based Heal the Bay, 42 out of more than 500 beaches across the state earned spots on the Honor Roll, which is reserved for beaches that score grades of A+ for water quality during all seasons and weather conditions.

Of those 42 beaches, 20 are in Orange County, the most for any county in the state. San Diego County has 10 beaches on the list, including five in Carlsbad. Los Angeles County has three — Palos Verdes Cove, Palos Verdes Long Point and Redondo State Beach at Topaz Street.