Suffolk County, New York, has pushed to replace common cesspools with advanced onsite systems that reduce nitrogen pollution, and now a couple of communities within it are going further.The county occupies roughly the eastern two-thirds of Long Island and includes such wealthy communities as the Hamptons, known as a weekend retreat for very wealthy residents of New York City. The county also has a large number of cesspools and their accessory problems of poor water quality. About 360,000 homes in the county, or about 75 percent of all homes, use cesspools for wastewater treatment.In early August, the town of East Hampton,
