Once the irrigation period ends and water demand is lowered, the water source for the OID will be changed from lake water to well water. It is currently anticipated that this changeover will occur on Saturday November 7, 2020. Associated with the changeover, the reservoir has to be emptied and cleaned. As a result, there will be a water supply disruption (affecting both water availability and water pressure) on Saturday November 7, which is expected to last from 8 AM to 2 PM.
Note that the boil water notice will continue to be in effect even after the changeover to well water is completed since periodically water demand in winter exceeds the amount that can be pumped from the well, in which case lake water is automatically added to the well water in the system to maintain sufficient quantity and water pressure.