Authorities have charged 30 people after a six-month-long investigation into drug sales in several Beaver County communities. According to a release sent by the New Brighton Area police department, warrants were served Tuesday in Beaver Falls, New Brighton, Aliquippa and Ambridge. So far, 17 people have been arraigned. Many of those charged stemmed from sales of heroin and cocaine to confidential informants. Police have not yet named those who have been charged.