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| Red Tide Sampling |
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Beginning in January 2006, the Sarasota County Health Department, working jointly with Mote Marine Laboratory, conducts weekly red tide (Karenia brevis) cell counts to monitor red tide on our county beaches.
- The Department of Health will notify beach goers of red tide conditions and update beach status during a bloom event.
 Frequently Asked Questions about Red Tide
Map of Beach Sample Sites
Sampling Note: Samples are typically taken on Mondays with results available and updated by Wednesdays. Sampling and results may be delayed due to severe weather or holidays.
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Sarasota County Health Department
Healthy Beaches Program |
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Name |
Date |
K Brev. |
Quality |
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Longboat Key |
11/16/09 |
<1 |
Present |
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Ringling Causeway |
11/16/09 |
<1 |
Present |
| North Lido Beach |
11/16/09 |
<1 |
Present |
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Lido Casino |
11/16/09 |
<1 |
Present |
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South Lido Park |
11/16/09 |
<1 |
Present |
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Siesta Key Beach |
11/16/09 |
<1 |
Present |
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Turtle Beach |
11/16/09 |
<1 |
Present |
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Nokomis Beach |
11/16/09 |
1 |
Present |
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North Jetty Beach |
11/16/09 |
<1 |
Present |
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Venice Beach |
11/16/09 |
<1 |
Present |
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Service Club Park |
11/16/09 |
<1 |
Present |
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Venice Fishing Pier |
11/16/09 |
<1 |
Present |
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Brohard Beach |
11/16/09 |
<1 |
Present |
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Caspersen Beach |
11/16/09 |
<1 |
Present |
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Manasota Beach |
11/16/09 |
<1 |
Present |
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Blind Pass Park |
11/16/09 |
<1 |
Present | |
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Karenia brevis counts Legend |
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Description |
(cells/ml) |
Possible Effects (K. brevis only) |
| Present |
- |
<1 |
None |
| Very Low a |
>1 |
<5 |
Possible respiratory irritation |
| Very Low b |
>5 |
<10 |
Possible respiratory irritation and shellfish harvesting closures |
| Low a |
>10 |
<50 |
Respiratory irritation, but chlorophyll levels too low to be detected by satellites |
| Low b |
>50 |
<100 |
Respiratory irritation, maybe fish kills, and bloom chlorophyll probably detected by satellites |
| Medium |
>100 |
<1,000 |
Respiratory irritation and probable fish kills |
| High |
>1,000 |
- |
As above plus discoloration | |
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