Beginning Nov. 20, 2023, every U.S. household can again place an order to receive four more free COVID-19 rapid tests delivered to their home by visiting If you did not order tests this fall, you may place two orders for a total of eight tests. Additionally, before you discard any “expired” test kits you have, please check here to see if the expiration dates of your COVID-19 tests have been extended.

Blue Green Algae (Cyanobacteria)

Blue-green algae blooms have raised concerns in Connecticut and across the nation because these organisms can produce a wide array of neurotoxins, liver toxins, cell toxins and skin irritants.  In still and  warm summer waters, populations of blue green algae may increase to the extent that a normally clear surface can become thick and murky.  This overgrowth is called a “bloom”.  Blooms are considered harmful due to the potential to cause health effects in people and pets over-exposed to these organisms.


Facts about Cyanobacteria and Cyanobacterial Harmful Algal Blooms (CDC)


For more information, view the following resources:


Contact Information:

  • To Report a Bloom:  If you believe that you have observed an algae bloom contact your Local Public Health Department or email the CT Department of Energy and Environmental Protection
  • If you are concerned that you may have been exposed to cyanobacteria and are having symptoms, contact your doctor or the Connecticut Poison Control Center at 800-222-1222.  If you are concerned that your pet may have drunk water with cyanobacteria and is having symptoms, contact your veterinarian.  For other health-related questions, contact the Environmental Health Section’s Public Beach Program at the CT Department of Public Health (DPH) at (860) 936-1125.


Circular Letters: