City of Portland, OregonThe Portland International Airport Noise Impact Overlay Zone reduces the impact of aircraft noise on development within the noise impact area surrounding the Portland International Airport. The zone achieves this by limiting residential densities and by requiring noise insulation, noise disclosure statements, and noise easements. https://www.portlandoregon.gov/bps/article/53357 -- Additional Information: Category: Zoning Code Purpose: Map were Airport Noise Impact Overlay Zone applies. Is mapped as (x) overlay on zoning maps. Update Frequency: As Needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=53447ArcGIS DynamicMapLayerhttps://hub.arcgis.com/datasets/59b9d2c11c044e33ae1131c98a8845ee_142engPortlandMaps Open DataPublicAirport Noise Impact Overlay Zone [Oregon--Portland]Web servicesOregon--PortlandOregonLast Modified: 2025-07-28