| Tulsa Master Recyclers AssociationTulsa | Form 990-N | No figure |
| Watershed Restoration IncorporatedNorman | Form 990-N | No figure |
| Fish Lake Land Trust IncTulsa | Form 990-N | No figure |
| Spring Creek Coalition IncOaks | Form 990-N | No figure |
| Oklahomans for Responsible Water Policy IncBroken Bow | Form 990-N | No figure |
| Keep Broken Arrow Beautiful IncBroken Arrow | Form 990-N | No figure |
| Friends of Northern Flyer Alliance IncStillwater | Form 990-N | No figure |
| Earth RebirthOklahoma City | Form 990-N | No figure |
| Cleveland County Master Gardener AssociationNorman | Form 990-N | No figure |
| Kay County Master Gardeners IncorporatedPonca City | Form 990-N | No figure |
| Watershed Sustainability Alliance IncOklahoma City | Form 990-N | No figure |
| Scissortail Land and Wildlife CorpTulsa | Form 990-N | No figure |
| Cimarron Range Preservation AssociationFreedom | Form 990-N | No figure |
| Keep Catoosa Beautiful IncCatoosa | Form 990-N | No figure |
| Oklahoma Green Schools Program IncOklahoma City | Form 990-N | No figure |
| Full Circle Heritage and Environmental AllianceCatoosa | Form 990-N | No figure |
| No Mo StyroTulsa | Form 990-N | No figure |
| Cdots Institute for Innovation & Economic Growth IncOklahoma City | Form 990-N | No figure |
| Talimena Scenic Drive Association IncTalihina | Form 990-N | No figure |
| The Prairie Dominion Integration SyndicateTulsa | Form 990-N | No figure |
| Team Up to Clean UpEufaula | Form 990-N | No figure |
| Friends of Blue Thumb IncOklahoma City | Form 990-N | No figure |
| Forest Essence FoundationSpavinaw | Form 990-N | No figure |
| Oklahoma Prescribed Burn AssociationWoodward | Form 990-N | No figure |
| Cross Timbers Prescribed Burn AssociationChandler | Form 990-N | No figure |
| Town of Bessie Foundation IncBessie | Form 990-N | No figure |
| Adair County Litter Free & Green AssociationStilwell | Form 990-N | No figure |
| Tulsa Urban Wilderness Coalition IncTulsa | Form 990-N | No figure |
| International Water for Life IncNichols Hills | Form 990-N | No figure |
| Tall Bearded Iris SocietyMidwest City | Form 990-N | No figure |
| Oklahoma Clean Lakes AssociationOklahoma City | Form 990-N | No figure |
| Ouachita Mountains Resource Conservation & DevelopmentPoteau | Form 990-N | No figure |
| Solid Waste Institute of Northeast OklahomaTahlequah | Form 990-N | No figure |
| Oklahoma Garden ClubsEdmond | Form 990-N | No figure |
| Chisholm Trail Historical Preservation SocietyYukon | Form 990-N | No figure |
| Wheatland Resource Conservation and Development AssociationPonca City | Form 990-N | No figure |
| Piedmont Historical SocietyPiedmont | Form 990-N | No figure |
| Oklahoma Association of Resource Conservation & Development CouncilWeatherford | Form 990-N | No figure |
| Great Plains Preservation and Development FoundationStillwater | Form 990-N | No figure |
| Downtown Cushing Revitalization AssociationCushing | Form 990-N | No figure |
| Green Connections IncOklahoma City | Form 990-N | No figure |
| Hackberry Flat Foundation IncorporatedFrederick | Form 990-N | No figure |
| Tulsa Area Conservation FoundationTulsa | Form 990-N | No figure |
| Oklahoma Asssociation for Environmental EducationOklahoma City | Form 990-N | No figure |
| Gloss Mountain Conservancy IncFairview | Form 990-N | No figure |
| Shartel Boulevard Development Authority IncOklahoma City | Form 990-N | No figure |
| Oklahoma Grazing Lands Coalition IncOklahoma City | Form 990-N | No figure |
| Norman Area Land Conservancy IncNorman | Form 990-N | No figure |
| Tenkiller Park PartnersVian | Form 990-N | No figure |
| South Central Region of National Council of State Garden Clubs IncEdmond | Form 990-N | No figure |