This kit explores a realistic legal battle over water pollution. Students serve as unbiased Environmental Protection Services scientists hired to perform examinations on simulated polluted water and bottom sediment samples.

Their results will either support or refute allegations made by a town's city hall against its local paper and plastic manufacturer. Students test for foreign organic compounds (PCBs) and inorganic contaminants (lead and mercury). All test materials are nonhazardous. Kit contains materials for 2 classes of 24 students working in pairs.