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Trends in Swim Advisories

trend

Number of Microcystin-Related Swim Advisories Issued at Iowa State Park Beaches

Microcystin-Related Advisories Issued Per Year

Over the span of ten years, the number of annual swim advisories issued for microcystin by the Iowa Department of Natural Resources has increased dramatically. 

Advisory Events due to Microcystin

Total Microcystin Advisories Issued


Number of E. coli-Related Swim Advisories Issued at Iowa State Park Beaches

E. coli-Related Advisories Issued Per Year

Similar to trends in microcystin-related advisories, the number of annual E. coli-related swim advisories issued at Iowa State Park beaches is also trending upward: 

Annual E. coli Related Warnings

Total Instances of E. coli Related Swim Advisories