Diemer Filtration Plant | The Center for Land Use …
The Diemer Plant (aka The Robert B. Diemer Treatment Plant) is on top of a ridge above Yorba Linda, and is one of the largest filtration plants in the country. It cleans water that comes from the Colorado River Aqueduct, then distributes the water to about 40% of Orange County. Water flows downhill from the plant into the Allen-McCollough Pipeline, …