| Friends of Gillette Castle State Park IncEast Haddam | Form 990-EZ | $44,351FY2025 |
| Perry House Foundation IncStratford | Form 990-EZ | $43,700FY2024 |
| Indian Lake Association of CT & NYSharon | Form 990-N | No figure |
| Lake Quassapaug Association IncMiddlebury | Form 990-N | No figure |
| The Woodbridge Land Trust IncorporatedWoodbridge | Form 990-N | No figure |
| Great Island Preservation IncDarien | Form 990-N | No figure |
| Ridgefield Garden Club IncRidgefield | Form 990-N | No figure |
| Stonington Land Trust IncStonington | Form 990-N | No figure |
| Going Coastal IncStamford | Form 990-N | No figure |
| Quinnipiac River Watershed AssociationMeriden | Form 990-N | No figure |
| Mad Gardeners IncSherman | Form 990-N | No figure |
| Morris Land Trust IncBantam | Form 990-N | No figure |
| The Fairfield Garden Club IncSouthport | Form 990-N | No figure |
| Merritt Parkway Conservancy IncStamford | Form 990-N | No figure |
| Land Conservancy of Ridgefield IncRidgefield | Form 990-N | No figure |
| Park City Compost Initiative IncBridgeport | Form 990-N | No figure |
| Save Ocean Beach IncNew London | Form 990-N | No figure |
| Race Against Time IncHartford | Form 990-N | No figure |
| Institute for Ocean StudiesNorth Haven | Form 990-N | No figure |
| Heritage Land Preservation Trust IncTorrington | Form 990-N | No figure |
| Remarkable STEAM IncWestport | Form 990-N | No figure |
| King Cobra ConservancyBerlin | Form 990-N | No figure |
| Stony Hill PreserveHawleyville | Form 990-N | No figure |
| East River Watershed Research Institute IncOrange | Form 990-N | No figure |
| Rockwell Street Gardens IncNorwich | Form 990-N | No figure |
| Green Eco Warriors IncWindsor | Form 990-N | No figure |
| Friends of White Deer Rock IncMiddlebury | Form 990-N | No figure |
| Caretakers of Soapstone Mountain IncSomers | Form 990-N | No figure |
| Environmental Health Institute of Connecticut IncEllington | Form 990-N | No figure |
| Lake Beebe Watershed Association LtdWest Hartford | Form 990-N | No figure |
| Friends of Outer Island IncBranford | Form 990-N | No figure |
| Connecticut Orchid Society IncFarmington | Form 990-N | No figure |
| Avon Land Trust IncAvon | Form 990-N | No figure |
| Washington Environmental Council IncWashington | Form 990-N | No figure |
| Laurel Garden Club of Beacon FallsBeacon Falls | Form 990-N | No figure |
| Wallingford Land Trust Inc theWallingford | Form 990-N | No figure |
| Citizens for EastonEaston | Form 990-N | No figure |
| Land Heritage Coalition of Glastonbury IncSouth Glastonbury | Form 990-N | No figure |
| Lower Connecticut River Land Trust IncEssex | Form 990-N | No figure |
| Dogwood Park Association IncRiverside | Form 990-N | No figure |
| Connecticut Master Gardener Assoc IncFarmington | Form 990-N | No figure |
| Friends of Sellecks Woods IncDarien | Form 990-N | No figure |
| Crystal Pond Association IncEastford | Form 990-N | No figure |
| Chester Land TrustChester | Form 990-N | No figure |
| Rainbow Recycling IncNew Haven | Form 990-N | No figure |
| Land Trust of West Haven IncWest Haven | Form 990-N | No figure |
| Bashan Lake AssociationEast Haddam | Form 990-N | No figure |
| The Crystal Lake Association IncEllington | Form 990-N | No figure |
| Highland Lake Watershed Association IncWinsted | Form 990-N | No figure |
| Pequabuck River Watershed AssocBristol | Form 990-N | No figure |