MARCO ISLAND — Caxambas Pass and Big Marco Pass had very low levels of red tide this week, the only beaches to test above background levels for the microscopic algae bloom, pollution monitors said Tuesday.
Satellite images offshore Collier County continue to show patches of elevated to very high chlorophyll concentrations, a possible indicator of red tide.
Red tide can release a toxin that kills marine life and can cause coughing, watery eyes and other respiratory problems in people. Offshore winds should minimize the red tide's effects at the beaches through the weekend.
Collier County pollution monitors are advising people with emphysema and asthma to use caution when going to the beach because their symptoms may be aggravated.
No dead fish have been reported since Oct. 25; no respiratory irritation has been reported since Oct. 21. More samples are scheduled to be collected Thursday.
To report dead fish or red tide symptoms, call 239-252-2502. Red tide updates are available by calling the county hot line at 239-252-2591 or by going to wwww.colliergov.net/redtideupdate.