布朗菲尔德地区的污染问题类型也各不相同. These may include: asbestos; leaking underground storage tanks that generally cause petroleum contamination; and soil and water contamination caused by the discharge or dumping of organic and inorganic chemicals such as petrochemicals, 溶剂, 重金属, 和铅. Not all Brownfield sites are environmentally contaminated; some sites are merely perceived to be contaminated. 棕地通常含有中度到低水平的污染. 它们通常不代表联邦和州超级基金项目所处理的污染问题.
