Summer has officially arrived and for many people that means pulling the floaties out of storage and hitting the beach. Well, before you barrel onto the freeway to hit the surf and sand, it’s worth doing some research about just what is waiting for you in that water – and we’re not talking sharks.

According to the Natural Resources Defense Council’s 23rd annual beach water quality report, released Wednesday, many of America’s beaches have some serious water pollution issues. But never fear, the report also includes beaches with 5-star “superstar” ratings, so you can skip the bacteria soup and head to a better beach.

“Sewage and contaminated runoff in the water can spoil a family vacation real fast, turning a day of lounging at the beach into a day at the doctor’s office with a sick child,” said NRDC senior attorney Jon Devine.

The report, “Testing the Waters: A Guide to Water Quality at Vacation Beaches,” is a collection of the latest beach water quality data from the U.S. Environmental Protection Agency from more than 3,000 testing locations nationwide. Click here for the full report and zip-code searchable map.

This report focuses on just one but critical element of beach water quality: bacterial contamination --so pollution pretty much created by human and animal waste. The authors note that there are all types of pollution that destroy beaches and cause serious illness, and a definitive list on the “cleanest” and “dirtiest” beaches based on all these types of pollutants would be "almost impossible" to put together. 

So with that in mind, here's a list of some of America’s cleanest and dirtiest beaches.