The Calvert County Department of Public Safety, Division of Emergency Management, will conduct additional outdoor warning siren testing beginning Thursday, June 4, 2026, at 9 a.m.
The supplemental testing follows the full-cycle test conducted June 1 and is intended to ensure all sirens are reaching the appropriate decibel levels throughout the surrounding areas.
The testing will involve randomly selected sirens located throughout Calvert County and near the Calvert Cliffs Nuclear Power Plant emergency planning zone. Residents may hear siren activations intermittently during the testing period.
The sirens selected for testing include:
· Siren 1 – Prince Frederick Volunteer Fire Department (Old Field Road)
· Siren 61 – Mill Bridge Road
· Siren 55 – Route 760/Rousby Hall Road (near Patuxent High School)
· Siren 29 – Route 765 at South Plant Access/Nursery Road
· Siren 23 – Parran Road near Mackall Road
Testing is expected to begin at approximately 9 a.m. on June 4 and continue through the listed siren locations until completed.
Residents are reminded that this is only a test of the outdoor warning siren system. No action is required.
Visit the Calvert County Alert Notification System webpage to learn more about the county’s siren alert system and find additional emergency planning and mitigation information from the Department of Public Safety.
Find information on Calvert County Government services online at www.CalvertCountyMd.gov. Stay connected with Calvert County Government through the mobile app, newsletters, social media and more at www.CalvertCountyMd.gov/StayInformed.
