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BWI Marshall Airport Noise Zone

The Baltimore/Washington International Thurgood Marshall Airport (BWI Marshall) 2020 Airport Noise Zone (ANZ), incorporated by reference within COMAR and displayed as the noise zone on contours maps, has been certified as the ANZ for BWI Marshall effective April 19, 2021.

The Maryland Environmental Noise Act of 1974 provides for the protection of citizens from the impact of transportation related noise. The aviation portion of the Act requires the MDOT MAA to create an Airport Noise Zone (ANZ) to control incompatible land development around BWI Marshall Airport and a Noise Abatement Plan (NAP) to minimize the impact of aircraft noise on people living near the Airport.

The initial ANZ and NAP for BWI Marshall Airport was established in 1976, and was updated and certified in 2014, incorporated by reference at COMAR MDOT MAA has completed an update to the BWI Marshall ANZ.

2020 BWI Marshall ANZ Update

In 2019, MDOT MAA initiated an update to the BWI Marshall ANZ. The ANZ is determined by a composite of three noise contours: the ANZ study process considered existing conditions (2020) and two forecast years (2025 and 2030). The largest of the three contours in any area around the Airport determines the Noise Zone, thereby offering protection within the largest of the existing or future noise exposure contours. The noise environment around an airport is described by contours of equal noise exposure, representing the noise that occurs during an average 24-hour day, in terms of the Day-Night Average Sound Level (DNL, Ldn).

A Public Workshop and Public Hearing for the BWI Marshall ANZ update was held virtually on Thursday, January 28th, 2021. The Public Workshop and Public Hearing provided an opportunity for all interested persons to learn, ask questions, and comment on the ANZ. A presentation that provided an overview of the ANZ update process and the contour maps depicting the current and proposed boundaries of the BWI Marhsall ANZ was given, and can be reviewed here.

If you were unable to attend the Public Hearing and wish to provide comments on the study, written statements may be submitted to Mr. Bruce Rineer at until February 16, 2021. If you have any additional questions or comments regarding the ANZ Update, please contact Mr. Bruce Rineer at MDOT MAA is providing a response to some questions that were posed at the public workshop for which MDOT MAA indicated a follow up would be provided.

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