John Wayne Airport (SNA) is one of the most noise sensitive airports in the United States. The Airport is located in the center of Orange County, California, surrounded by several residential communities. To mitigate potential noise impacts from aircraft operations, the Airport maintains some of the most stringent noise rules in the United States.
The General Aviation Noise Ordinance (GANO) has been adopted by the County of Orange to regulate the hours of operation and the maximum permitted noise levels associated with general aviation operations. Compliance with the GANO is mandatory unless deviations are made necessary by ATC instructions, a medical or in-flight emergency, or other safety considerations.