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Click on datapoints in the HABs map for more information & data:

Note: If no data points are visible, no data are available, choose a different date range.

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Eyes on the Bay - Interactive Mapping of Current Year Long-Term Station Data
Show Legend
Relative algal abundance:
blue circle map icon
Site Sampled
Algae were sampled, no harmful species identified
green circle icon
Algae Bloom
High abundance of algae that are not known to produce any toxins, but impact bay health.
No human health advisory.
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Potentially Harmful Algae
A species of concern was identified below bloom thresholds. No human health advisory.
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Harmful Algae Bloom
Public should be aware of blooms in the vicinity. Blooms have the potential to produce toxins that are harmful to humans, pets, or fish and/or have ecosystem impacts.

Algae are a natural part of the Bay ecosystem; however, some algae may be harmful when they bloom in unnaturally high abundance or they may produce a toxin that can impact people, animals and/or bay life.  Toxin testing is initiated when cell densities exceed set thresholds.

Visit DNR's Harmful Algal Bloom page for more information.

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