2007 water-quality reports for popular beaches show that levels of bacterial contamination—we're talking fecal matter from wildlife, storm drains, and leaky sewage systems—have little to do with community affluence. (See all 16 beaches and violations.)
Take Santa Monica, California, where the median home price exceeds $1 million: Its beach was the second-worst offender, with 76 advisories warning of excessive fecal bacteria last summer. New York City's Coney Island, where the median home value is $461,195, had no advisories. While many ocean beaches in the U.S. make it through the swimming season without any advisories, the Environmental Protection Agency is concerned enough that it's doling out $9.75 million in grants this year to improve seashore sanitation.