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Contaminated Sites:

Back to Hazardous Substances Map What is a contaminated site?

Contaminated sites are sites that are known, or suspected, to pose significant risks to the Tribal community, its traditional practices, and/or subsistence resources. It may be a site that is contaminated by old mining wastes, metals, organic and inorganic chemicals, and other hazardous substances that present human health risks through releases to soil, air, ground and surface waters and sediment. These sites may also threaten sensitive habitats for plants, fish, and wildlife.

It is impossible to describe the "typical" contaminated site because they are all so very different. Many are landfills. Others are manufacturing plants where operators improperly disposed of wastes. Some are large federal facilities with different areas of contamination from various military activities. Transportation spills, other industrial processes, natural disasters, or storage accidents account for some hazardous waste releases. The result can be fires, explosions, toxic vapors, and contamination of groundwater used for drinking.

Is there an area or site in or near your community that residents are concerned about? Your site(s) may be identified with one or more of the federal programs/databases listed below under Related Pages. However, many contaminated sites are not listed on the federal or even on the state level.

Contaminants of Concern:

Each contaminated site will have different contaminants of concern. Most can be found searching online for fact sheets associated with each site or comparable sites. Contaminants may include, but are not limited to:
   Inorganic pesticides
   Organic pesticides
   Halogenated solvents
   Petroleum compounds

Implementing Solutions:

Brownfields programs can help facilitate the assessment of contaminated sites.

You can petition the Agency for Toxic Substances and Disease Registry (ATSDR) to request a public health consultation regarding a hazardous waste site or facility. Details are available at ATSDR's Division of Health Assessment and Consultation website. An example of an ATSDR public health assessment for USAF Galena Air Force Station is located HERE.

Please submit your experiences (successes/challenges) and tribal-specific documents to share on our website using the attached form.
Download Form


Possible/Probable Contaminants Related to Land Uses [pdf]

Tribal Hazardous Sites 2004 Report [pdf]

OSHA Guidance Manual [pdf]

EPA Science and Ecosystem Support Division Waste Sampling Guidance [pdf]


Office of Emergency Management (EPA):

Cleaning Up Our Land, Water, and Air:

How to find, determine, and assess a contaminated site:
Environmental Justice Viewer (find federally registered hazardous sites) (EPA):

National Priorities List (EPA):

Hazard Ranking System (mechanism EPA uses to place uncontrolled waste sites on the NPL):

CLU-IN (Contaminated Site Clean-up Information):

Related Pages:


Coal Mining

Federal Facilities


Common contaminated sites include: landfills, manufacturing plants, transportation spills, storage accidents, abandoned buildings, old fuel-storage tank farms, old canneries and fish processing facilities, abandoned or inactive dumpsites, logging camps, old civilian federal facilities such as schools and hospitals

For more information, please contact:
Todd Barnell, Program Manager
Tel: 928/523-3840
Email: Todd.Barnell@nau.edu

Jennifer Williams, Alaska Program Coordinator, Sr.
Tel: 928/523-0673
Email: Jennifer.Williams@nau.edu

« Hazardous Substances Map

Last updated: July 10, 2015


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Northern Arizona University, South San Francisco Street, Flagstaff, Arizona 86011