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| Company | Location | County | Certifications | License # |
|---|---|---|---|---|
| Lake Ouachita Shores Resort | Mount Ida, AR | — | Pumper | — |
| Lakeview Cove Marina - Boat | Lakeview, AR | — | Pumper | — |
| Laland Huggins | Shirley, AR | — | Installer | — |
| Lamon Kaiser | Paragould, AR | — | Installer | — |
| Lance Rogers | Lowell, AR | — | Installer | — |
| Landon Gillmore | Batesville, AR | — | Installer | — |
| Landon Raley | Sheridan, AR | — | Installer | — |
| Lanny Richmond | Williford, AR | — | Installer | — |
| Larry Cooper | Mount Ida, AR | — | Installer | — |
| Larry Duncan | Hensley, AR | — | Installer | — |
| Larry Johnson | Greenbrier, AR | — | Installer | — |
| Larry Moody | Shirley, AR | — | Installer | — |
| Larry Pennington | Bee Branch, AR | — | Installer | — |
| Larry Sizemore | Tontitown, AR | — | Installer | — |
| Lawrence County Septic Service | Walnut Ridge, AR | — | Pumper | — |
| Lawrence Wallace | Jonesboro, AR | — | Installer | — |
| Layne Couch | Paragould, AR | — | Installer | — |
| Len Lawrence | Malvern, AR | — | Installer | — |
| Leo Palmer | Prairie Grove, AR | — | Installer | — |
| Levi Huffman | Seligman, AR | — | Installer | — |
| Levi Pilkington | Avinger, TX | — | Installer | — |
| Lewis Franken | Mena, AR | — | Installer | — |
| Little Rock Yacht Club Boat #2 | Little Rock, AR | — | Pumper | — |
| Lloyd Tidwell | Centerville, AR | — | Installer | — |
| Logan Brightwell | Harrison, AR | — | Installer | — |
| Logan Foster | Cash, AR | — | Installer | — |
| Logan Frasier | Rogers, AR | — | Installer | — |
| Logan Mays | Harrison, AR | — | Installer | — |
| Lonnie Collins | Springdale, AR | — | Installer | — |
| Lonnie Haley | Evening Shade, AR | — | Installer | — |
| Louis Hamilton | Paragould, AR | — | Installer | — |
| Louis Ligi | Rogers, AR | — | Installer | — |
| Louis Sanders | Marshall, AR | — | Installer | — |
| Loyd Deckard | Heber Springs, AR | — | Installer | — |
| Loyel Harris | Jonesboro, AR | — | Installer | — |
| Lucas Rains | Viola, AR | — | Installer | — |
| Luke Dickerson | Calico Rock, AR | — | Installer | — |
| Luke Kite | Marshall, AR | — | Installer | — |
| Luke Palmer | Glenwood, AR | — | Installer | — |
| Luke Ragland | Marshall, AR | — | Installer | — |
| Luther Elliott | Jonesboro, AR | — | Installer | — |
| Lydon Goss | Bryant, AR | — | Installer | — |
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