What term describes property where hazardous substances, pollutants, or contaminants are present or potentially present?

The term that describes property where hazardous substances, pollutants, or contaminants are present or potentially present is "Brownfield." This term is widely used in environmental policy and urban planning to refer specifically to previously developed land that may be underutilized or vacant due to real or perceived contamination.

Brownfields are often subject to redevelopment efforts encouraged by local governments and economic initiatives aimed at revitalizing urban areas. The presence of hazardous materials complicates development plans; however, regulations and incentives are in place to facilitate the cleanup and safe repurposing of these sites.

In contrast, a Superfund site refers to a specific designation under the federal Superfund program for sites that have been identified as needing cleanup due to hazardous waste and are overseen by the Environmental Protection Agency (EPA). Industrial Waste Sites and Contaminated Zones may describe locations with problematic waste or contamination, but they do not carry the same specific connotation in terms of potential for redevelopment and community revitalization that the term "Brownfield" does.