The following Airport Impact Area maps show the noise contours for ONT and the affected land uses. These contours are established by modeling annual operations at the airport and adjusting the levels based on actual noise measurement data for that time period. Each 4th Quarter map is based on calendar year information for the respective year. The contours shown are measured in CNEL (Community Noise Equivalent Level) for the 65dB, 70dB and 75dB noise levels. These maps will be updated quarterly during the current year as they become available.
LAWA is in the process of replacing the entire noise monitoring system and, unfortunately, the production of the quarterly noise contour maps have been delayed due to staff time constraints because of this project, as well as system issues encountered when incorporating and transitioning to the new noise monitoring system. Noise Management anticipates that the noise contour map for 2008 will be available and posted on this web site by the end of the year.
(The maps on this page are best viewed in the 1024 x 768 screen resolution.)
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