REEF uses a hierarchical 8-digit code system for survey site locations. Each geographic area has its own set of codes. When completing a survey, you need to know the complete 8-digit code for the site you surveyed.
If the site that you surveyed is not currently on our list, then please email zonecode@REEF.org to request a new code to be assigned. Please provide the site name, general location, and ideally the latitude and longitude.
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See a list of all locations within this region
OR
Choose one from the map below:
Region: HAW
Zone: Oahu
![](/sites/all/modules/custom/reef_zones/images/zoom.png)
![](/sites/all/modules/custom/reef_zones/images/table.png)