The Utah County Health Department reopened the Lincoln Marina today after two consecutive weeks of test results showed cyanobacteria cell-count concentrations had dropped below the threshold for a Danger Advisory. The Lincoln Marina continues to exceed the recreation health-based threshold for primary contact with water and has been placed under a Warning Advisory.
Utah Department of Health/Utah Department of Environmental Quality Health Advisory Guidance recommends two consecutive weeks of sampling data to downgrade a harmful algal bloom (HAB) health advisory on a waterbody.
Lincoln Marina sampling data show the cyanobacteria cell-count concentrations are now below the 10 million cells per milliliter (cells/ml) threshold for a Danger Advisory:
- July 16, 2018 sampling results: 3,420,881 cells/ml
- July 9, 2018 sampling results: 7,898 cells/ml
July 16, 2018, cell-count densities and microcystin levels of 17.4 micrograms per liter (µg/L) still exceed the recreation health-based threshold, warranting a Warning Advisory for the marina.
A Warning Advisory indicates a moderate relative probability of acute health risk, cell-count densities of 20,000 – 10 million cells per milliliter (cells/ml), microcystin levels of 4-2,000 micrograms per liter (µg/L), or anatoxin-a levels above non-detect. Advisory actions:
- Do not swim or water ski
- Do not ingest the water
- Keep pets and livestock away
- Clean fish well and discard guts
- Avoid areas of scum when boating
The Division of Water Quality (DWQ) continues to collect samples on Utah Lake and other water bodies across the state. For updates on harmful algal blooms in Utah, please visit habs.utah.gov.