The attached map serves as an interactive catalog of all of the reported blooms on Cayuga Lake in 2018. Click on an icon to see important information including a picture of the bloom, location, and results when/if they become available. Yellow icons represent “suspicious” blooms, orange icons represent “confirmed” blooms, and red icons represent “confirmed with high toxins” blooms. Map results are cumulative. It’s important to note the date of sampling because blooms are transient by nature and can disappear in as little as a day. We do not track bloom duration.
Cyanobacteria (blue-green algae) may produce a variety of chemicals that are harmful to other species, including humans. The most common harmful chemical found in New York is microcystin. Detailed toxicity studies have not been performed, and there is not yet a consensus on acceptable exposure levels. The New York State Department of Health (NYSDOH) has set upper limits for public drinking water supplies at 0.3 ug/L or parts per billion (ppb) and for public swimming beaches at 4.0 ppb (EPA, 2017). The New York State Department of Environmental Conservation (NYSDEC) defines a “bloom with high toxin” as 20 ppb near the lake shore and 10 ppb in open water (NYSDEC HABs Program Guide, Section 3).
Note: Table opens in a new tab as a google spreadsheet. You can download the spreadsheet as an excel file to manipulate the data, i.e. data sorting, graphing, cell highlighting, etc.
Increase table size by clicking on the percentage button in the upper left-hand corner of the spreadsheet. The first three columns and first three rows are frozen so that you can more easily scroll through results without losing track of the sample you’re interested in.
The table is broken up into four major sections: Basic Bloom Information (green), Bloom Location Information (lavender), CSI Analyses (shades of blue), and NYSDEC Funded Analyses (shades of orange).
Samples that are collected and dropped off at CSI are assigned a unique Bloom Sample Code that have the following format; 18-ZONE-B*. 18 stands for 2018, followed by the zone where the sample was collected (see map with zone polygons), and ending with the next consecutive number. For example, the third suspicious bloom sample collected from zone 3426 would be 18-3426-B3. Bloom Sample Code is the best way to identify a sample and track results in the table.
Basic Bloom Information and Bloom Location Information will be updated upon sample receipt. If testing is warranted by CSI, NYSDEC, or both, the latter sections will say “Testing Results Pending.” If testing is not warranted, reasoning will be provided.
For more information you can contact:
Cayuga Lake Harmful Algal Bloom Monitoring Program Coordinator
Claire Weston, CSI