Virginia Officials Issued Advisory on Chesapeake Algae Bloom
The health department warned of toxins and low oxygen levels caused by a bloom of Alexandrium monilatum.
Updated on Sept. 21, 2026 in Asthma
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The Virginia Department of Health has issued a public advisory regarding an ongoing algae bloom of Alexandrium monilatum in the Chesapeake Bay. This bloom is currently affecting waters off the Eastern Shore in Northampton and Accomack Counties.
Why it matters
The bloom poses risks to local aquatic life by depleting dissolved oxygen and releasing toxins that cause fish kills. Human health concerns include potential skin irritation, though officials noted that fish remain safe to eat if properly cooked.
The Alexandrium monilatum algae is known to bioluminesce at night and produce odors as it significantly lowers dissolved oxygen levels in the water. The bloom is currently centered off the Eastern Shore and is projected to spread into the York and James Rivers.
The players
Virginia Department of Health
This state agency oversees public health policy and issues critical safety advisories for residents and visitors across Virginia.
The details
The algae species, which can cause skin irritation for humans, is actively reducing dissolved oxygen levels to the detriment of local fish populations. Residents are advised to be aware of the bioluminescence and odors associated with the bloom while noting that consuming fish is considered safe when cooked to appropriate temperatures.
Timeline
September 21, 2026: The Virginia Department of Health issued the public advisory.
The Big Picture
This bloom represents a localized departure from the water quality metrics tracked by the Chesapeake Bay Program. The event highlights the vulnerability of the region's aquatic environment to shifts in biological activity.
Residents should be mindful of the bloom when entering the water to avoid potential skin irritation. The health department has clarified that consuming fish remains safe for the public provided it is cooked to the proper temperature.
The takeaway
While the algae bloom can cause concerning fish kills and water odors, basic safety precautions like thorough cooking of seafood remain effective. Residents should remain updated on local alerts as the bloom continues its expected migration toward the York and James Rivers.
Further reading
For broader updates on regional health and environmental safety, visit Asthma.
Live Poll
Do you feel comfortable recreating in local waters given recent reports of algae blooms?
