07/30/2010 12:10 pm ET | Updated May 25, 2011

Cleanest Southern California Beaches: NRDC Report

On the heels of our 10 Most Polluted California Beaches list based on NRDC's 2010 Testing The Waters report, we've rounded up all the 5 and 4-star rated beaches in Southern California.

The cleanest beaches are picked from a list of the 200 most popular U.S. beaches, and NRDC awarded one star each for:

1) Meeting water quality standards in 2009.
2) Meeting water quality standards in 2008.
3) Testing frequency (more than once a week).
4) Promptly issuing a closing or advisory warning when a water sample exceeded state standards.
5) Promptly posting closing or advisory signs (online and at the beach) when necessary.

The following Southern California beaches received four or five stars.

The Cleanest Beaches In California