Environmental Planning

Highway Bridge

CE Assignment and NEPA Assignment

The assumption of the Federal Highway Administration (FHWA) environmental review responsibilities under the National Environmental Policy Act (NEPA)

Worker writing

Guidance for Federal-Aid Projects

A repository for guidance and documents related to environmental clearances for ADOT projects.

QA/QC Bridge Image

Quality Assurance and Quality Control

ADOT Environmental Planning is committed to conducting quality environmental reviews and producing the highest quality environmental documents in compliance with the National Environmental Policy Act (NEPA) and all related environmental laws affecting transportation project development.

Air Quality

Air Quality

The ADOT Air Quality Planning Group works to enhance air quality through congestion mitigation, air quality programs, and National Environmental Policy Act (NEPA) planning activities to implement provisions required in the Clean Air Act to meet National Ambient Air Quality Standards throughout Arizona.

Environmental Planning Brochure

The brochure provides an overview of Environmental Planning.

Quick Reference Guide

The ADOT Quick Reference Guide helps Environmental Planners and Project Team members expedite environmental review of Local Public Agency projects.

Additional Resources

Forms and templates for ADOT staff and consultants.

Contact Us

Highway noise barrier wall


The ADOT Noise Team works to provide procedures for noise studies and noise abatement measures, supply noise abatement criteria, and to establish requirements for information to be given to local officials for use in the planning and design of highways approved pursuant to Title 23, United States Code (USC).

Mountain Goat - Biology

Biology & Clean Water Act Section 404/401

The ADOT Biology Program is comprised of biologists and specialists focused on evaluating sensitive species, developing appropriate conservation measures and coordinating the biological components of ADOT projects and operations with land managing and resource agencies and Arizona tribes.

Historic Preservation Team

Cultural Resources

The ADOT Historic Preservation Team members are responsible for the inventory and evaluation of cultural resources within ADOT’s right-of-way, and for ensuring that ADOT construction, maintenance, and operations activities are in compliance with Section 106 of the National Historic Preservation Act, the Arizona Historic Preservation Act, and other relevant state and federal regulations.

Hazmat Clean Up

Hazardous Materials

ADOT projects that entail, subsurface excavation, structure demolition or renovation, property acquisition, and other significant actions with potential impacts to the environment, must have an assessment performed to determine the potential liabilities, health and safety concerns, and other consequences related to the presence of hazardous material impacts. These assessments are generally performed under the guidelines of the EPA, FHWA, ASTM, OSHA, & ADEQ.

Material Source

Material Source Guidance

For any given project, the contractor supplies the needed materials by using either an ADOT-licensed source or a contractor-furnished source. Whether the material source is an ADOT-licensed source or contractor-furnished source, it requires environmental approval prior to every use.

small stream

Water Resources

The ADOT Water Resources Group oversees regulatory requirements on surface and groundwater for ADOT activities and is responsible for improving water quality in by promoting innovative best management practices, providing effective water quality education, and facilitating cooperation among ADOT and affected stakeholders.

ADOT Workers


A repository for guidance and documents related to maintenance activities and encroachments permits.

Poppies next to a roadway


ADOT is dedicated to being a leader in initiatives and programs that support and protect the environment and the quality of life for all of Arizona. Read more about some of the ways ADOT is identifying and addressing environmental issues in our state.



Upcoming and suggested environmental training.