Brownfields

The New York State Department of Environmental Conservation identifies Brownfield sites in New York City.

A brownfield site is any real property where a contaminant is present at levels exceeding the soil cleanup objectives or other health-based or environmental standards, criteria or guidance adopted by DEC that are applicable based on the reasonably anticipated use of the property, in accordance with applicable regulations.

Source

DEC Remediation Site Boundaries - Downloadable GIS Files

https://www.dec.ny.gov/chemical/102009.html

See the "Brownfield Cleanup Program" records in the file "remedsiteborders.zip"

New York City Office of Environmental Remediation

The Searchable Property Environmental E-Database displays and returns data related to brownfields.

https://maps.nyc.gov/moer/speed/login.jsp