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Palo Verde Testing Siren System Today

Nuclear Plant to Sound Emergency Sirens

Annual Test Part of Federal Requirements


On Wednesday, November 14, 2012, Palo Verde Nuclear Generating Station, in cooperation with local and State agencies, will test the 48 outdoor warning sirens located within the 10-mile emergency planning zone of the nuclear generating station.


In the unlikely event of an emergency at Palo Verde, one of three response agencies (Maricopa County Department of Emergency Management, Maricopa County Sheriff’s Office or the Arizona Department of Public Safety) would activate the alerting sirens as a means of directing residents to turn on their radios and televisions. 


An Emergency Alert System message would then provide the public with emergency information. 


The annual testing will activate the sirens for a full three minutes to ensure operability. Volunteers from the West Valley Amateur Radio Club, the Tri-City Amateur Radio Club and other unaffiliated ham operators will be stationed at each siren and immediately report siren activation to emergency managers.   


Sirens will be tested twice, once at 12:00 p.m. (noon) and again at 12:30 p.m. on Wednesday. The Arizona Department of Transportation (ADOT) will activate electronic message signs along Interstate 10 in the West Valley to notify drivers of the test.


Sirens are part of the “Alert and Notification System” required by federal regulations.  This annual testing of the siren system is required by the Nuclear Regulatory Commission and the Federal Emergency Management Agency.


For more information, contact Julie Syrmopoulos at Maricopa County Department of Emergency Management at 602-273-1411.




The Maricopa County Department of Emergency Management, in conjunction with the Arizona Division of Emergency Management, coordinates and implements offsite response plans for the Palo Verde Nuclear Generating Station.  Palo Verde Nuclear Generating Station is operated by Arizona Public Service (APS) and is owned by a consortium of seven utilities in the Southwest.  It is the largest power producer of any kind in the United States.



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