Nuclear Power Plant Sirens across New Jersey
New Jersey has a total of three nuclear power stations, with two of the units being currently operational as of 2026. The sirens were installed as a precaution. All three of the power plants used sirens from Alerting Communicators of America, also known as ACA sirens. They were installed at all three power plants, Oyster Creek, Hope Creek, and Salem Creek.
This is a video of an ASC T-121 siren sounding for a test of the power plant sirens in NJ. Video credit, NJ.com
New Jersey Nuclear Power Plant Emergency Warning Siren History
Oyster Creek
Warning Siren History
The sirens for Oyster Creek comprised 11 ACA Cyclone 125s, 17 ACA Allertor 125s, and 3 ACA Banshees 115s. This system would last a short time before being upgraded with ACA Cyclone 125s and ACA Banshees 115s in the 1980s. This lasted until 2012/2013, when the system was replaced after failing to sound during Hurricane Sandy. The sirens were replaced by American Signal Corporation's Tempest 128 sirens. Oyster Creek unfortunately shut down in 2018, and therefore, all of the sirens are now inactive for that power plant. They are still a sight to behold, though.
Warning Siren History
The sirens for the Hope and Salem Creek Nuclear Power Plants had 7 ACA P-10 sirens, 18 ACA P-15 sirens, 8 ACA Cyclone 125 sirens, and 2 ACA Banshee 115 sirens. Around 2006, the power plants replaced their system with American Signal Corporation Tempest 121 sirens around 2006 for an unknown reason. This system still serves the power plant today. The sirens for Salem and Hope Creek are still operational.
Salem & Hope Creek
Oyster Creek Nuclear Warning Siren Infomation
Siren Testing Information: Not currently testing due to being permanently shut down in 2018.
Siren System Status 2026: Not active; however, it can be reactivated in the case of a radiation emergency. Owned by Holtec, the decommissioner of Oyster Creek.
Siren System Updates: Control of the sirens has not been handed over to the Ocean County Office of Emergency Management. The sirens look to be unmainied as of this time.
Salem & Hope Creek Nuclear Warning Siren Infomation
Siren Testing Information: First Tuesday of January at 10:45 AM, First Tuesday of April at 7:20 PM, First Tuesday of July at 7:20 PM, First Tuesday of October at 10:45 AM.
Siren System Status 2026: Active and well-maintained. Testing is carried out on time and is well-notified ahead of planned tests. The only sirens that do not test are those that have osprey nests on them.
Siren System Updates: A new siren was added to the siren map per update by the Nuclear Regulatory Commission.