share: digg facebook twitter Just about every mom and dad in this rural northern Ohio town gets nervous whenever their children get a sinus infection or a stomachache lingers. Since 1996, 35 children have been diagnosed — and three have died — of brain tumors, leukemia, lymphoma, and other forms of cancer — all within a 12-mile wide circle that includes two small towns and farmland just south of Lake Erie. Investigators have tested wells and public drinking water, sampled groundwater and air near factories and checked homes, schools and industries for radiation. "From the very beginning, we've said the vast majority of childhood cancer causes aren't known," said Robert Indian, the state health department's chief of comprehensive cancer control. The diagnoses peaked in 2006, when nine children were told they, too, had cancer. [...] there have been four new cases. Enrollment numbers at area schools haven't dropped and real estate agents say they haven't encountered anyone who doesn't want to look for homes in the area or is desperate to get out. Air and water samples have not revealed any concerns around the Whirlpool plant or the Vickery Environmental waste site just outside town, where hazardous chemicals are injected into rock a half-mile below ground. [...] in September, investigators said they found no radiation from homes, schools, or industries to link to the illnesses, ruling out the Davis-Besse nuclear plant, about 20 miles from Clyde, and NASA's former nuclear reactor near Sandusky as a possible source. State health officials have spent recent months asking the sick children and their families dozens of questions about their homes and health histories, hoping to find a link. [...] it's not a surprise. Ohio Environmental Protection Agency Director Christopher Korleski said the state has consulted with federal health officials throughout the investigation and that they've signed off on the steps Ohio has taken. Brandy Kreider, a mother of five children, said she and her husband spent an agonizing week and sleepless nights wondering if they were making a mistake before buying a new home in town two years ago. [...] leaving didn't feel right.