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Blending Facility
HistoryWater Tank
The Blending Facility (BF) was placed in service in 1992 as a means of reducing the hardness of the District’s production well water by combining it with softer water from San Francisco Regional Water Supplies. 

Functions
The BF utilizes three parallel in-line static mixers each with a design capacity of 20 MGD, which provide the mixing for the water from the Mowry and Peralta / Tyson Wellfields, and San Francisco Regional Water Supplies. 

The BF production rate is limited by several factors including hydraulic capacity, hardness targets, and water costs. Normal sustainable output from the BF is 45 million gallons per day (MGD), however the distribution system can be valved such that total production from the BF can reach 60 MGD.