The Office of Environmental Services (OES) oversees the environmental programs within the agency. OES ensures compliance with local, state, and federal environmental laws during the construction and operation of ADOT facilities.

OES works closely with governmental agencies having environmental mandates including the Environmental Protection Agency and the Arizona Department of Environmental Quality.

OES is divided into 4 groups, which include:

• Compliance Group
The Compliance Group provides information to help ensure that environmental regulatory requirements are met for all ADOT activities. This includes mitigation measures resulting from the environmental investigations, terms and conditions of Section 404 permitting, and many more regulatory acts.

• Water Quality Group
The Water Quality Group provides information on regulatory requirements on surface and groundwater for all ADOT activities. This includes requirements for the storm water program and aquifer protection program.

• Policy and Standards Group
The Policy and Standards Group develops critical environmental governance policy and guidance. This Group is also instrumental in the creation, development and implementation of environmental management systems at ADOT.

• Roadside Resources Group
The Roadside Resources Group is responsible for managing land, wildlife, and vegetation along roadway corridors throughout the state primarily for reasons of public safety, infrastructure maintenance, and ecological management.