GroundTruth / superfund / AZ
Iron King Mine - Humboldt Smelter
- NPL status
- NPL Site
- EPA ID
- AZ0000309013
- Location
- Dewey-Humboldt, AZ
- Coordinates
- 34.5, -112.25 (map)
EPA's live site profile is authoritative for cleanup status and history.
This page states the federal record as of 2026-08-05. It is not a safety assessment: the NPL (National Priorities List) is the federal Superfund cleanup list, the status describes where a site is in that process, and "deleted from the NPL" means EPA determined cleanup was completed.