Calvert County, MD - Official Website - Alert Notification System
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Alert Notification System

Siren Alert System
In an emergency, county officials would activate the siren alert system within a 10-mile radius of the power plant. The sirens alert the public to tune in to local radio stations for information and instructions on any emergency situation. The sirens are not a signal to evacuate. In a community emergency, Calvert Cliffs’ sirens would sound a steady three- to five-minute signal.

The sirens may also be used to alert the public to other emergencies such as dangerous weather conditions.

Siren Tests

The alert notification system sirens are tested regularly to ensure they are working correctly. The testing is part of normal maintenance; no public action is necessary. Siren test dates are noted below. Siren tests last approximately three minutes. Remember, in an emergency, the sirens would sound repeatedly.

2018 Siren Test Schedule:       

  • Monday, June 4: 12 p.m.
  • Monday, December 3: 12 p.m.

Accidental Siren Sounding
If you hear a siren but no message is broadcast on the radio or television within 30 minutes, the siren is probably malfunctioning. Please report malfunctions to the Calvert County Emergency Management Division by calling 410-535-3491.

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