Definitions for "Brownfields"
urban land areas that once supported industry or commerce but were abandoned and are presently unused and may be contaminated with industrial waste
Industrial properties suspected or known to be polluted during their past use are called brownfields.
Abandoned, idled, or underused industrial and commercial properties where expansion or redevelopment is complicated by real or perceived contamination. These areas are eligible for the Brownfields Tax Incentive Deduction.