Each May, the City of Redmond begins the annual testing of residential lawn irrigation system backflow assemblies throughout the City. These tests are required for compliance through the City Code and the Oregon Administrative Rules to help protect our water system. The City will select a contractor to perform these tests during the spring and summer months when irrigation systems are operational. The contractor will be conducting the tests 7-days a week in order to complete the testing cycle during the irrigation season. If arrangements need to be made for our contractor to gain access to your assembly unit, please notify the Public Works Department at (541) 504-2000.