Airport Impact Overlay District

The AIOD is administered by Loudoun County. The boundaries are based on the Loudness Day Night (LDN) noise contours that were updated by the Metropolitan Area Airports Authority (MWAA) in 2019, as well as a one-mile buffer that extends beyond the 60 decibel LDN contour for both the Washington-Dulles International Airport and Leesburg Municipal Airport. Amendments to the AIOD were adopted by the Board of Supervisors on January 17, 2023. Contact the Department of Planning and Zoning within any questions.

AIOD数据集由劳登县负责管理。其边界以大都会机场管理局（Metropolitan Area Airports Authority, MWAA）2019年更新的昼夜声级（Loudness Day Night, LDN）噪声等值线为基础，同时包含针对华盛顿杜勒斯国际机场与利斯堡市政机场的、位于60分贝LDN噪声等值线外侧的1英里缓冲区域。AIOD的修订方案已于2023年1月17日经劳登县监督委员会审议通过。如有任何疑问，请联系规划与区划部门。