No. Many toxic tort claims are class action lawsuits, but not all of them are. It's not uncommon for a toxic tort claim to stem from a class action lawsuit. Class action lawsuits are filed on behalf of a large number of plaintiffs who have suffered the same or similar injury, in this case, from some type of toxic or environmental aspect. When a plaintiff isn’t entitled to much compensation on their own, but there’s a large group of people who have been harmed, class action lawsuits are common.
However, many toxic tort or environmental lawsuits are filed on behalf of a single plaintiff. For example, you might file a toxic tort case involving asbestos and mesothelioma. These are often filed on behalf of one plaintiff because the damages are so severe. Asbestos exposure leads to mesothelioma, which is an aggressive and deadly disease. In a case like this, there’s often no need for a class action lawsuit.