| Name | Location | Services | ||
| Portsmouth | ||||
| Atlantic Aqua Sport | Rye | |||
| Portsmouth Scuba | Portsmouth | |||
| Southern Coast | ||||
| York Beach Scuba | York Beach | |||
| Diver's Locker | Lyman | |||
| Saco Bay Divers | Old Orchard Beach | |||
| DDiving | Scarborough | |||
| Casco Bay | ||||
| Aqua Diving Academy | Portland | |||
| Johnson's Sporting Goods | Portland | |||
| Zero Gravity Dive Center | S. Portland | |||
| Maritime Dive Services | Portland | |||
| Rollins Scuba Associates | Portland | |||
| Midcoast | ||||
| Aqua City Scuba | Waterville | |||
| Down Under Scuba | Livermore Falls | |||
| Penobscot Bay | ||||
| Johnson's Sporting Goods | Rockland | |||
| Maine Divers Scuba Center | Bangor/Brewer | |||
| Skin Diver's Paradise | Auburn | |||
| Mount Desert | ||||
| Bill's Dive Shop | Ellesworth | |||
| Harbor Divers | Bass Harbor | |||
| Down East | ||||
| Downeast Diving | Perry | |||
| Kissing Fish Dive Shack | Machias, Calais | |||
| Passamaquoddy Bay | ||||
| Navy Island Dive Company | St. Andrews | |||
| Fundy and Saint John | ||||
| Inland | ||||
| Skin Diver's Paradise | Auburn | |||
| Barclay' Skin Diving Paradise | Auburn | |||
| All Resource Divers | Sebec | |||
| Mainely Scuba | Wilton | |||
| Sea Ventures, Inc. | Wayne | |||
 |
Specialized dive and rescue training. | |||