A multi-year environmental investigation of Camp Hero concluded that no further action was necessary at the site.

Believers often claim that secret, subterranean laboratories still hide beneath the park. To address safety concerns, the U.S. Army Corps of Engineers conducted a thorough site-wide investigation between 2016 and 2018. They collected approximately 1,300 soil, sediment, and groundwater samples across the former military base. Their final report found no hazardous or toxic wastes, leading to an official proposal of 'No Further Action' in late 2019.