Public utilities provide electric, gas, water or telephone service to customers in a specified area. Utilities have a duty to provide safe and adequate service on reasonable terms to anyone who lives within the service area on without discriminating between customers. Because most utilities operate in near monopolistic conditions, they can be heavily regulated by local, state, and federal authorities. Generally, the local and state agencies are called Public Service Commissions (PSC) or Public Utility Commissions (PUC). Municipal Utilities and Rural Electric Cooperatives may be unregulated though.
Derby is an unincorporated community along the Ohio River in far southern Union Township, Perry County, Indiana, United States. It lies at the intersection of State Roads 66 and 70 above the city of Tell City, the county seat of Perry County. Its elevation is 449 feet (137 m), and it is located at 38°1′49″N 86°31′38″W / 38.03028°N 86.52722°W / 38.03028; -86.52722 (38.0303400, -86.5272018). Although Derby is unincorporated, it has a post office, with the ZIP code of 47525.