The Natural Resources Defense Council recently released its annual survey of water quality at U.S. beaches. The report was based on water samples taken last summer to determine the level of bacteria. The exceedance level is how much a beach exceeded health standards for water quality.

Click on a marker on the map to see how that beach fared. Use the controls on the left or double-click to zoom in.

0% exceedance 1%-10% exceedance Above 10% exceedance