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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Region: HAW
Zone: Oahu
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| Zone | Zone Code list | Geographic Report | Name | Have Coordinates? |
|---|---|---|---|---|
| 31 | Zone Code list | Geographic Report | Leeward Side Oahu (Kaena Pt. - Diamond Head) | |
| 3101 | Zone Code list | Geographic Report | Waianae Coast (Kaena Pt. - Barbers Pt.) | |
| 31010001 | Geographic Report | Makaha Caverns | Yes | |
| 31010002 | Geographic Report | The Mahi | No | |
| 31010003 | Geographic Report | Kahe Point Beach Park (Electric Beach) | Yes | |
| 31010004 | Geographic Report | Land of Oz | Yes | |
| 31010005 | Geographic Report | Kea'Au Corner | Yes | |
| 31010006 | Geographic Report | Ko'olina Lagoons | Yes | |
| 31010007 | Geographic Report | Airplane Canyon / Airplane Reef | Yes | |
| 31010008 | Geographic Report | Stars | No | |
| 31010009 | Geographic Report | Deep LCU | Yes | |
| 31010010 | Geographic Report | Lanikuhonua (between Marriott and Paradise Cove Luau) | Yes | |
| 31010011 | Geographic Report | Southend Yokahama | Yes | |
| 31010012 | Geographic Report | Turtle Cleaning Rock | No | |
| 31010013 | Geographic Report | Makua Beach | Yes | |
| 31010019 | Geographic Report | Ulua Cavern | No | |
| 31010020 | Geographic Report | Papio Pass | No | |
| 31010021 | Geographic Report | Gene Pool | No | |
| 31010022 | Geographic Report | 2 Minutes Out | No | |
| 31010023 | Geographic Report | Shallow LCU | Yes | |
| 31010024 | Geographic Report | Twin Caves / Twin Holes (Waianae) | Yes | |
| 31010025 | Geographic Report | 29 Down | Yes | |
| 3102 | Zone Code list | Geographic Report | Mamala Bay (Barbers Pt. - Diamond Head) | |
| 31020001 | Geographic Report | Kewalo Pipe | Yes | |
| 31020002 | Geographic Report | Magic Island/Rainbow Reef, outside lagoon, channel side | Yes | |
| 31020003 | Geographic Report | YO-257/San Pedro | Yes | |
| 31020004 | Geographic Report | Sea Tiger Wreck | Yes | |
| 31020005 | Geographic Report | Kaiser Reef | Yes | |
| 31020006 | Geographic Report | Nautilus | No | |
| 31020007 | Geographic Report | Pinnacles | No | |
| 31020008 | Geographic Report | Pearl Harbor Wall | No | |
| 31020009 | Geographic Report | Waikiki Groin | Yes | |
| 31020010 | Geographic Report | Hilton Hawaiian's Channel | Yes | |
| 31020011 | Geographic Report | Ala Moana Beach Park | Yes | |
| 31020012 | Geographic Report | Magic Island Lagoon | Yes | |
| 31020013 | Geographic Report | Kakaako Waterfront Park | Yes | |
| 31020014 | Geographic Report | Sand Island, Beach (Sand Island ) | No | |
| 31020015 | Geographic Report | Queen's Surf Beach (W of San Souchi Beach, E of Kuhio Beach) | No | |
| 31020016 | Geographic Report | Waikiki MLCD Ewa (West) between groins | Yes | |
| 31020017 | Geographic Report | Waikiki MLCD Diamond Head (East) between groin and Natatorium | Yes | |
| 31020018 | Geographic Report | Kaimana FMA | Yes | |
| 31020019 | Geographic Report | Kuhio Beach near Royal Hawaiian Hotel | Yes | |
| 31020020 | Geographic Report | Outer Reef MLCD | Yes | |
| 31020021 | Geographic Report | Magic Island (Center outside reef) | Yes | |
| 31020022 | Geographic Report | Tongg's - FMA | Yes | |
| 31020023 | Geographic Report | Shorebird Hotel Channel (near Saratoga St.) | Yes | |
| 31020024 | Geographic Report | Navy Tug / Nashua YTB-774 | Yes | |
| 31020025 | Geographic Report | Mario World / Ke'ehi Pipe | No | |
| 31020026 | Geographic Report | Horseshoe Reef / Secrets | No | |
| 31020027 | Geographic Report | Rockpiles / Ala Moana Bowls | Yes | |
| 31020028 | Geographic Report | Fort DeRussy Beach | Yes | |
| 31020029 | Geographic Report | Makalei Beach Park | Yes | |
| 32 | Zone Code list | Geographic Report | South Coast Oahu (E. of Diamond Head - Makapuu Pt.) | |
| 32000001 | Geographic Report | Diamond Head | Yes | |
| 3201 | Zone Code list | Geographic Report | Maunalua Bay | |
| 32010001 | Geographic Report | Turtle Canyon | Yes | |
| 32010002 | Geographic Report | The Corsair Wreck | Yes | |
| 32010003 | Geographic Report | Hawai'i Loa Crater | Yes | |
| 32010004 | Geographic Report | Waialae Beach Park | Yes | |
| 32010005 | Geographic Report | Angler's Reef / Angler Fish Reef | Yes | |
| 32010006 | Geographic Report | Koko Crater | Yes | |
| 32010007 | Geographic Report | Kahala at Hunakai Street | Yes | |
| 32010008 | Geographic Report | Baby Barge | Yes | |
| 32010009 | Geographic Report | Fantasea Reef | Yes | |
| 32010010 | Geographic Report | Spitting Caves | No | |
| 32010011 | Geographic Report | Kaalawai (Kahala) | Yes | |
| 32010012 | Geographic Report | Kahala at Kala Place | Yes | |
| 32010013 | Geographic Report | Landing Craft / LCU Wreck | Yes | |
| 32010014 | Geographic Report | Corner Pockets | No | |
| 32010015 | Geographic Report | Keanu Reef | No | |
| 32010016 | Geographic Report | Mardi Gras II (Wailupe Beach) | Yes | |
| 3202 | Zone Code list | Geographic Report | Kawaihoa Pt. - Makapuu Pt. (incl. Hanauma Bay) | |
| 32020001 | Geographic Report | Inside Reef Hanauma Bay | Yes | |
| 32020002 | Geographic Report | Outside Reef Hanauma Bay | Yes | |
| 32020003 | Geographic Report | Witch's Brew Hanauma Bay | Yes | |
| 32020004 | Geographic Report | Palea (outside Hanauma Bay) | Yes | |
| 32020005 | Geographic Report | Lanai Lookout | Yes | |
| 32020006 | Geographic Report | Koko Head Sea Cove | Yes | |
| 32020007 | Geographic Report | Koko Head Drift Dive | Yes | |
| 32020008 | Geographic Report | Hanola Blow Hole / From Here To Eternity | No | |
| 32020009 | Geographic Report | LST Wreck (Landing Ship Tank - Hawaii Kai) | No | |
| 32020010 | Geographic Report | Alan Davis Beach | Yes | |
| 32020011 | Geographic Report | Koke'e Beach Park | Yes | |
| 33 | Zone Code list | Geographic Report | Windward Side Oahu (Makapuu Pt. - Kahuku Pt.) | |
| 3301 | Zone Code list | Geographic Report | Kaneohe Bay (Makapuu Pt. - Kualoa Pt.) | |
| 33010001 | Geographic Report | Manana Island | No | |
| 33010002 | Geographic Report | Moku Manu | No | |
| 33010003 | Geographic Report | Coconut Island | No | |
| 33010004 | Geographic Report | Lanikai at Kaiolena Dr. | Yes | |
| 33010005 | Geographic Report | Please use 32010005 (was Angler's Reef) | No | |
| 33010006 | Geographic Report | Heela State Park | Yes | |
| 33010007 | Geographic Report | Kailua Beach Park (Popola Island) | No | |
| 33010008 | Geographic Report | Makai Pier | Yes | |
| 33010009 | Geographic Report | Kaiona Beach Park | Yes | |
| 33010010 | Geographic Report | Kaneohe Bay (intersection of Kamehameha and Lulani) | Yes | |
| 33010011 | Geographic Report | Officer Beach / North Beach | Yes | |
| 33010012 | Geographic Report | Fishpond Makaha 1 | Yes | |
| 33010013 | Geographic Report | Fishpond Makaha 2 | Yes | |
| 33010014 | Geographic Report | Fishpond Makaha 3 | Yes | |
| 33010015 | Geographic Report | Kaneohe Bay Sandbar | Yes | |
| 3302 | Zone Code list | Geographic Report | Kualoa Pt. - Kahuku Pt. | |
| 33020001 | Geographic Report | Kokololio Beach Park | Yes | |
| 33020002 | Geographic Report | La'ie Bay | Yes | |
| 33020003 | Geographic Report | Goat Island | Yes | |
| 34 | Zone Code list | Geographic Report | North Shore Oahu (W. of Kahuku Pt. - Kaena Pt.) | |
| 3401 | Zone Code list | Geographic Report | Kahuku Pt. - Puaena Pt. (north end of Waialua Bay) | |
| 34010001 | Geographic Report | Shark's Cove | Yes | |
| 34010002 | Geographic Report | Three Tables | Yes | |
| 34010003 | Geographic Report | Haleiwa Trench | Yes | |
| 34010004 | Geographic Report | Haleiwa Beach Co. Park - Use 34020002 | Yes | |
| 34010005 | Geographic Report | Laniakea Beach | No | |
| 34010006 | Geographic Report | Car Wash | Yes | |
| 34010007 | Geographic Report | Atlantis | Yes | |
| 34010008 | Geographic Report | Kawailoa Beach Park East | Yes | |
| 34010009 | Geographic Report | Shark Cove Pupukea - Use 34010001 | Yes | |
| 34010010 | Geographic Report | Waimea Bay | Yes | |
| 34010011 | Geographic Report | Kuilima Bay (by Turtle Bay Resort) | Yes | |
| 34010012 | Geographic Report | Chun's Reef | Yes | |
| 34010013 | Geographic Report | Sunset Beach | Yes | |
| 3402 | Zone Code list | Geographic Report | Waialua Bay - Kaena Pt. | |
| 34020001 | Geographic Report | Kaena State Park | Yes | |
| 34020002 | Geographic Report | Haleiwa Beach County Park | Yes | |
| 34020003 | Geographic Report | Camp Mokuleia | Yes | |
| 34020004 | Geographic Report | Haleiwa Ali'i Beach Park | Yes |