American Compost Society: Promotes composting in the community through demonstration and education programs to promote good gardening practices and improve the environment.
Cincinnati Nature Center: Provides the opportunity to experience, study and enjoy the natural world. Locations in Milford, Goshen, and Evendale.
Greater Cincinnati Daylily-Hosta Society: Includes event calendar and membership application.
Greater Cincinnati Earth Coalition Website: A community of non-for-profit organizations, businesses, government agencies and individuals from the tri-state region who work cooperatively and actively to promote the beauty and environmental quality of the tri-state area.
Green Umbrella: An alliance of organizations in the Ohio, Kentucky and Indiana tri-state region working to preserve the region's greenspace.
Miami Group, Sierra Club: Dedicated to protecting the environment. Includes newsletter, election information, events and links.
Millcreek Watershed Council: A publicly funded, non-profit corporation representing all 37 political jurisdictions in the Mill Creek watershed. Includes newsletter, event calendar, and overview of committees.