The new analytical solutions for one-dimensional multispecies ADEs coupled with a complex reaction network to describe a realistic PCE degradation pathway has been derived (Liao et al., 2022). The transport and fate processes include advection, hydrodynamic dispersion, branching degradation reactions from TCE to the three DCE isomers, and linear equilibrium isotherm sorption. The solutions can handle the reaction network that consists of seven species with five decay levels, in which the TCE produces three isomers of DCE.