The City’s overall water system has been divided into three (3) flushing areas, therefore over a three (3) year period the whole system will have been flushed and the cycle will start over again. This year, we are conducting hydrant flushing in Pressure Zone 3, which includes Napa Valley Commons (corporate park), Soscol Gateway, portions of Alta Heights and Browns Valley, Silverado Resort, and northwest Napa. Areas not included in this year’s program will be flushed in the winter of 2021-22 or 2022-23. View map of the Full City Flushing Area (PDF).