Fairfax Water will test the Occoquan Dam siren at 10 a.m. Wednesday, Nov. 18. No action is required during the test.
The siren, a loud whooping sound, warns people along the Occoquan River between the Town of Occoquan and Belmont Bay in the unlikely event the dam fails. It sounds only for tests or a dam failure. Residents can check whether they live in the impact zone on the siren website.
