Katherine Landing Water Treatment Plant
The National Park Service (NPS) initiated a project to replace four aging water treatment facilities within Lake Mead National Recreation Area. The largest of these facilities is Katherine Landing located in Arizona on the southern end of the recreation area on Lake Mohave. Due to increasing visitation and a failing direct filtration plant, a new facility was needed.

Richard P. Arber Associates was selected by the NPS to perform the design of the new Katherine Landing Membrane Water Treatment Facility. Katherine Landing is one of the first facilities in the U.S to use a dual membrane system of microfiltration and nanofiltration to produce purified drinking water. The system achieves high passage of desired minerals with high rejection of organic compounds. This innovative design removes total organic carbon but allows desired minerals and alkalinity to pass through to maintain corrosion control and taste. To protect the aquifer and fully utilize this natural water resource, the membrane reject streams are blended with the raw water and used in a subsurface bubbler system. The system uses raw water in combination with the reject stream to irrigate native plants at the campground areas.