History of NNEPA
The mission for NNEPA is as follows: With respect for Diné values: "to protect, preserve, enhance public health, welfare and the environment", for the present & future generations by developing, implementing, and enforcing strong environmental laws; to foster public awareness and cooperation through education and motivation.
The Navajo Environmental Protection Commission was established in 1972.
In 1995, legislation made the Navajo Nation Environmental Protection Agency (NNEPA) a separate regulatory branch of the Navajo Nation government and charged it with protecting human health, welfare, and the environment of the Navajo Nation.
In April 1995, the Navajo Nation Council passed a resolution establishing the NNEPA department and approved adoption of the Navajo Nation Environmental Policy Act. This Act provides guidance for , NNEPA in addition to recognizing that a clean environment contributes to maintaining harmony and balance on the Navajo Nation.