Anne Arundel and Prince George's counties have the worst ozone air pollution in the Washington area and are among the worst in the United States, a study released today by the American Lung Association said. Anne Arundel ranked 11th-worst among 678 counties monitored by the Environmental Protection Agency nationwide, based on data collected from 1996 to 1998. Prince George's tied for 24th-worst with Ocean County, N.J., and Wake County, N.C. No other Maryland counties ranked in the top 25.