*The Mullan Water Treatment Plant (0.8MGD) has the same data as the above table and same plant operators, was built at the same time, and is located 7 miles east. The larger town, Wallace, has a population of approximately 800. Initially, the design rated capacity of the Shoshone Water Treatment Plant was 2.0 MGD. Both plants utilize Koch hollow fiber membranes in a 4-stage mode (Wallace) and 3-stage (Mullan).

The Romicon® Hollow Fiber membranes are anisotropic (asymmetric). The self-supporting membrane can be backflushed to maximize the efficiency of the crossflow filtration process. This operating feature, combined with chemical stability, ensures reliability and long life expectancy. The hollow fiber geometry allows a high membrane surface area to be contained in compact modules providing high capacity while utilizing minimal space.