(NEXSTAR) – More than 1,100 sites around the country are suspected of being so contaminated, hazardous or polluted – or are at risk of becoming so polluted – that they have been deemed a national cleanup priority.

The Environmental Protection Agency (EPA) identifies places around the country that pose a risk to people’s health because they have been contaminated by hazardous waste.

Since 1980, the agency has taken charge of cleaning up those sites under a law with the nickname “Superfund.” (Its full name is The Comprehensive Environmental Response, Compensation, and Liability Act, or CERCLA.)

Superfund sites include poorly managed landfills, mining areas, or industrial facilities.

As of Sept. 7, when the National Priorities List was last updated, there were 1,178 sites, plus an additional 39 sites that were proposed as new additions. “It is a list of the worst hazardous waste sites identified by Superfund,” the EPA explains.

Oklahoma is home to nine such sites, including two in the Oklahoma City metro area.

One Superfund site name will be familiar to all: Tinker Air Force Base, or more precisely Soldier Creek/Building 3001 on base. “The Building 3001 area of Tinker AFB is a major aircraft rebuilding and refurbishing facility with a history of using large quantities of industrial solvents,” the EPA writes. Disposal of waste at the site ended up contaminated soil and groundwater. Cleanup is ongoing, according to the EPA.

Not far from Tinker is the Eagle Industries Superfund site in Midwest City. Up until the 2010s, the site was used to inspect and repair oxygen and fire extinguisher systems for planes. They used the carcinogen trichloroethylene (TCE) in their operations, but it was mishandled, and the harmful chemical ended up dumped on the ground at times.

Cleanup there is still ongoing, and people who live within a half-mile of the site should have their groundwater tested, the EPA says.

As part of its effort to inform the public on potential threats and hazards in their area, the EPA maps out every site on an interactive map. Zooming in on the map (below) allows you to see more information about the Superfund sites around Oklahoma.

Clicking on a site’s name gives you more information on why a site ended up on the National Priorities List. See the Superfund sites in your area on the map below:

Clicking on a site opens a pop-up window with more information, including the site’s Hazard Ranking System score. That score represents how likely a site is to release harmful substances into the surrounding environment, how toxic the waste on site is, and how many people are (or could be) impacted by the pollution, among other factors. The highest possible score is 100.

You can also view a full list of sites and explore the map on the EPA’s website.

Once a site is put on the National Priorities List, the EPA investigates the dangers posed to human health and pursues the best way of cleaning up the problem. The EPA may force the person or company responsible for the pollution to finance the cleanup, or it may take charge of cleanup if no party can be found responsible.

Once a site is fully cleaned up and the EPA determines there’s no further risk to people’s health or the surrounding environment, it can be deleted from the list. The site can then be redeveloped into something new.