the present invention is a water level detector or flood alarm device which will activate a warning once water has reached a pre - determined and potentially damaging or dangerous level . the present invention comprises a housing which maintains a conventional mercury activated float switch , an alarm coupled to the switch , a mounting device , and an attaching mechanism . the mounting device maintains the housing and includes a pivotal mechanism for enabling the housing to pivot and rotate . this pivoting and rotation will allow the housing to be angularly positioned , with respect to the ground , so that the float switch will be positioned horizontally and parallel with respect to the water . the attaching mechanism enables the device to be removably secured to any surface and to be maintained in a secured and installed position .