At ECOS, we believe that state and Tribal government agencies are the keys to delivering environmental protection afforded by both Federal and State law. Our membership is made up of state and territorial environmental agency leaders, all working together to improve the environment and public health.
Our members are state and territorial environmental agency leaders. Learn more about what they are working on.

The Environmental Research Institute of the States is a 501(c)3 organization that focuses on educational and research issues.

The Interstate Technology and Regulatory Council (ITRC) is a state-led coalition of state and federal regulators, industry, and stakeholders working together to achieve regulatory acceptance of environmental technologies.

The Exchange Network is a partnership among States, Territories, Tribes, and the U.S. Environmental Protection Agency that is improving and expanding the exchange of environmental information.

E-Enterprise for the Environment is a transformative 21st-century strategy to modernize how government agencies deliver environmental protection.