Illinois Environmental Council - Promotes sound environmental policy and protections for land, air, water, wildlife, and human health in the State of Illinois. Provides programs of education, policy study, publication, and outreach for groups and individual members.

Illinois Solar Energy Association - Seeks to provide education and resources through monthly meetings, sponsored events, expositions, and competitions. Site features educational articles, newsletter, rebate program information and links.

Illinois Natural History Survey - Extensive information on state flora and fauna, wetlands, ecological research, and related topics.

Illinois Environmental Compliance - Periodical providing an independent source of environmental regulation, policy and enforcement data.

Illinois State Water Survey - Services to the public, but its primary goal is to disseminate a wide variety of water and water-use information in an array of useable formats.

Flora and Fauna of Illinois - State government information resources.

Illinois NOx Emissions - Offers state and metro area nitrous oxide (NOx) emissions data for coal-burning power plants on an annual basis.

Illinois Nature Preserves Commission - Preserving, protecting, and defending the resources of Illinois for the benefit of the public.

Illinois State Geological Survey - ISGS provides objective scientific information to government, business, and the public. Our research and service programs encompass geologic mapping, water and mineral resources, environmental and engineering geology, geochemistry, and education.