News & Events
- Read our Fall 2022 Reporter, the BFS Newsletter!
- BFS Annual Reports for all years (1968 to 2021) are now available.
- No field trips are being scheduled at this time.
Beginning July 27, 2022, Harmful Algal Blooms (HAB) were been reported at Glimmerglass State Park Beach; the beach was closed to protect public health and safety. Other locations around the lake also experienced cyanobacterial bloom conditions sporadically through October. Toxins were detected in association with this bloom. Results of BFS testing (for informational purposes only) are below. As of late October, lake-wide conditions were improved (lower toxin concentrations, increased water clarity). As of mid-December, accumulations of white foam continue to form occasionally. Microcystis colonies were observed in foam sampled on 5 December, indicating that live colonies are still present in the water column.
To answer questions and concerns from the Otsego Lake community, we are providing links to information about HABs from the Department of Environmental Conservation and Department of Health. Shoreline conditions can change quickly. Avoid contact with cloudy or discolored water and surface scums. Pets are especially vulnerable. Water supply questions are addressed on the NYS Dept. of Health Harmful Algal Bloom Information Page.
From the DEC:
"Avoid contact with HABs. HABs in large lakes or rivers may be limited to specific shorelines or confined bays. Portions of any of these waterbodies may be clear and fully support recreational uses.
The public should use the information on the NYS DEC Harmful Algal Blooms (HABs) Notifications Page to help them make informed decisions about where and when to recreate, particularly outside of designated swimming areas. Swimmers and recreational users should remember that health and safety cannot be assured outside of designated swimming areas - for more swimming information, visit DEC's swimming webpage."
Cyanobacteria Toxin Analysis Results Updates
December 13, 2022: Total Microcystin concentration data were revised following quality control assessment; concentrations that were reported as 10 µg/L or greater have been revised to ">5 µg/L".
The Biological Field Station (BFS) collected samples for toxin analysis from 7 locations around Otsego Lake on 15 August 2022. All sites had detectable levels of the toxin microcystin; results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change rapidly with weather. That said, when the water looks like it did between 9:30am and 1pm yesterday, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
Sample Collection Notes: Collection began at 12:45pm at Three Mile Point; we proceeded clockwise around the lake. By the time we reached Fairy Springs the wind conditions had changed substantially, breaking up some of the surface accumulations that were seen earlier in the day along the western shore.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (15 August 2022) |
Total Microcystin (µg/L) |
|
Three Mile Point Swimming Area |
>5 µg/L |
|
BFS Thayer Boathouse |
>5 µg/L |
|
Springfield Public Landing |
>5 µg/L |
|
Fairy Springs Park Swimming Area |
0.7 µg/L |
|
Otsego Country Club |
0.3 µg/L |
|
BFS Main Laboratory Dock (Rat Cove)* |
>5 µg/L |
*BFS Main Lab Dock (Rat Cove) was sampled twice. First in the morning when the bloom was very dense and again later when the wind had broken up the accumulation, but cyanobacterial colonies were visible and abundant in the water. The intent was to determine if the concentration of toxin was meaningfully different; the concentration was lower in the afternoon, but still within a range of concern.
The method of analysis that we are using is Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L).
The Biological Field Station (BFS) collected samples for toxin analysis around Otsego Lake 17 August 2022. All sites had detectable levels of the toxin microcystin; some much higher than Monday. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change rapidly with weather. We have learned that when there are visible accumulations on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
Sample Collection Notes: Collection began at 10:30am at Three Mile Point; we proceeded clockwise around the lake. Two samples were collected at the Country Club to assess the difference between a dense shoreline accumulation and more dispersed colonies along their dock. Accumulations along the shoreline/beach at the Country Club and BFS Main Lab Dock were sampled directly – these exceed the DEC’s classification of a bloom with high toxin (Total Microcystin >20 µg/L).
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (17 August 2022) |
Total Microcystin (µg/L) |
|
Three Mile Point Swimming Area |
0.3 µg/L |
|
5 Mile Point Shore East of Docks |
>5 µg/L |
|
BFS Thayer Boathouse |
0.7 µg/L |
|
Springfield Public Landing Swimming Area |
0.4 µg/L |
|
Fairy Springs Park Swimming Area |
8.0 µg/L |
|
Cooperstown Country Club Swimming Area Dock |
0.9 µg/L |
|
Cooperstown Country Club Swimming Area Beach |
> 5 µg/L |
|
BFS Main Laboratory Dock (Rat Cove) |
> 5 µg/L |
|
BFS Main Laboratory lake water intake (unfiltered) |
< 0.15 µg/L |
| Open water, mid-lake off BFS (south end) | 0.9 µg/L |
*BFS Main Lab lake water intake was sampled to gauge the level of concern for those drawing water from the lake. This intake draws water from a depth of ~20-30ft (I will confirm the depth).
The method of analysis that we are using is Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). Moving forward we will continue sampling twice weekly as conditions warrant; we will post updates on the BFS homepage.
The Biological Field Station (BFS) collected samples for toxin analysis around Otsego Lake on 22 August 2022. All sites had detectable levels of the toxin microcystin, though concentrations lake-wide were generally less than last week. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change rapidly with weather. That said, when there are visible accumulations on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
Sample Collection Notes: Collection began at 10:00am at Three Mile Point; we proceeded clockwise around the lake. Weather conditions: overcast, occasional light rain, Air temp 70° F. No surface accumulations were visible where samples were collected. Small accumulations were observed in protected areas around boats and docks at both BFS properties.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 µg/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page.
| Sample Location (22 August 2022) | Total Microcystin (µg/L) |
| Three Mile Point Swimming Area | 0.4 µg/L |
| 5 Mile Point East End of Docks | 0.6 µg/L |
| BFS Thayer Boathouse | 1.3 µg/L |
| Springfield Public Landing Swimming Area | 1.6 µg/L |
| Fairy Springs Park Swimming Area | 0.3 µg/L |
| BFS Main Laboratory Dock (Rat Cove) | 0.2 µg/L |
Samples collected at Glimmerglass State Park Beach, Cooperstown Country Club, and an open water mid-lake site were not analyzed due to a lab error. Conditions at those locations were similar to those observed at Three Mile Point and BFS Main Laboratory Dock.
The method of analysis that we are using is Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). Moving forward we will continue monitoring toxin concentrations; we will post updates on the BFS homepage at least weekly.
The Biological Field Station (BFS) collected samples for toxin analysis around Otsego Lake 25 August 2022. The toxin microcystin was detected in all samples; results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change rapidly. That said, when there are visible accumulations on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
Sample Collection Notes: Collection began at 10:30am at the BFS Main Lab; we proceeded clockwise around the lake. Weather conditions: sun/partial clouds, Air temp 76° F. No surface accumulations were visible where samples were collected (except BFS Main Lab). Small accumulations were observed in protected areas around boats and docks at both BFS properties.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (25 August 2022) |
Total Microcystin (µg/L) |
|
Three Mile Point Swimming Area |
0.8 µg/L |
|
5 Mile Point Shore East of Docks |
<0.15 µg/L |
|
BFS Thayer Boathouse |
0.8 µg/L |
|
Springfield Public Landing Swimming Area |
0.5 µg/L |
|
Fairy Springs Park Swimming Area |
0.7 µg/L |
|
Cooperstown Country Club Swimming Dock |
0.2 µg/L |
|
Open Water Sample Mid-Lake, south end |
0.7 µg/L |
|
BFS Main Laboratory (Rat Cove) |
|
|
Dock, 10:30am |
0.2 µg/L |
|
Dock, 2:15pm |
0.5 µg/L |
|
Accumulations, 10:35am |
>5 µg/L |
The method of analysis that we are using is Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory. Moving forward we will continue monitoring toxin concentrations; we will post updates on the BFS homepage at least weekly.
The Biological Field Station (BFS) collected samples for total microcystin analysis around Otsego Lake on August 29, 2022. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
Sample Collection Notes: Collection began at 2:15pm at Fairy Springs Park; we proceeded clockwise around the lake. Weather conditions: sun, wind from S/SE, Air temp 86° F. Small accumulations were observed in protected areas around boats and docks at both BFS properties and 5 Mile Point.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (29 August 2022) |
Total Microcystin (µg/L) |
|
Three Mile Point Swimming Area |
0.6 µg/L |
|
5 Mile Point East End of Docks |
1.15 µg/L |
|
BFS Thayer Boathouse |
0.8 µg/L |
|
Springfield Public Landing Swimming Area |
0.9 µg/L |
|
Fairy Springs Park Swimming Area |
0.3 µg/L |
|
Cooperstown Country Club Swimming Dock |
0.2 µg/L |
|
BFS Main Laboratory (Rat Cove) |
0.3 µg/L |
The method of analysis that we are using is Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory. We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage at least weekly.
The Biological Field Station (BFS) collected samples for total microcystin analysis around Otsego Lake on 7 September 2022. Results for each location are below. We also analyzed mid-lake samples collected at various depths on August 31. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa. Next sampling date: September 12, 2022
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (07 September 2022) |
Total Microcystin (µg/L) |
|
Otsego Sailing Club Docks |
0.7 µg/L |
|
Three Mile Point Swimming Area |
0.7 µg/L |
|
5 Mile Point East End of Docks |
1.1 µg/L |
|
5 Mile Point: scum between shore and docks |
>5 µg/L |
|
BFS Thayer Boathouse Dock |
>5 µg/L |
|
Springfield Public Landing Swimming Area |
2.9 µg/L |
|
Fairy Springs Park Swimming Area |
0.7 µg/L |
|
Cooperstown Country Club Beach |
>5 µg/L |
|
BFS Main Lab Dock |
3.5 µg/L |
|
BFS Main Lab: accumulated scum at shore |
>5 µg/L |
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: Collection began at 11:30am at the BFS Main Lab Docks, followed by Fairy Springs Park, after which we proceeded clockwise around the lake. Weather conditions: overcast, generally calm, though a slight onshore breeze was felt at all sites. Air temp 62° F. Substantial surface and shoreline accumulations were observed at several locations – samples were taken to determine the difference between these ‘scums’ and conditions off nearby docks, where there were no surface accumulations. Lake users should check the shoreline conditions before allowing pets into the water.
|
Otsego Lake: Mid-Lake at Depth |
Total Microcystin (µg/L) |
|
Surface |
1.5 µg/L |
|
4 meters / ~13.1 feet |
1.4 µg/L |
|
12 meters / ~39.4 feet |
<0.15 µg/L |
|
16 meters / 52.5 feet |
<0.15 µg/L |
We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage weekly. The next sample collection is anticipated for Monday, September 12.
The Biological Field Station (BFS) collected samples for total microcystin analysis around Otsego Lake 12 September 2022. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. HAB conditions were evident at 6 of the 7 locations visited; community members reported HAB conditions at points along the West shoreline north of Three Mile Point, in the North end, and Hyde Bay. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (12 September 2022) |
Total Microcystin (µg/L) |
Water Surface Conditions |
|
Otsego Sailing Club Docks |
4.0 µg/L |
Surface accumulations beginning to form. |
|
Three Mile Point Swim Area |
>5 µg/L |
Small surface accumulations present. |
|
5 Mile Point East End of Docks |
>5 µg/L |
Surface accumulations present in open water around docks, in boat slips; dense accumulation between shore and docks. |
|
BFS Thayer Boathouse Dock |
>5 µg/L |
Surface accumulations present in open water around docks; dense accumulation along shore to North and South. |
|
Springfield Public Landing Swim Area |
>5 µg/L |
Extensive surface accumulations in swimming area, along shoreline, and around docks. |
|
Fairy Springs Park Swim Area |
0.8 µg/L |
No surface or shoreline accumulations were visible; water appeared clear, with a low abundance of colonies visible in surface waters. |
|
Cooperstown Country Club Dock |
2.1 µg/L |
No surface or shoreline accumulations in open waters; small surface accumulation was building in lily pads. |
|
BFS Main Lab Dock |
>5 µg/L |
Surface accumulations present in open water around dock, covering a large area. |
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: Collection began at 2:10pm at the BFS Main Lab Docks, followed by Fairy Springs Park, after which we proceeded clockwise around the lake. Weather conditions: part sun/clouds, generally calm, though a slight onshore breeze was felt at several sites. Air temp 77° F. As noted above, surface and dense shoreline accumulations were observed at many locations – samples were taken from docks, not directly from ‘scums’. Lake users should check the shoreline conditions before allowing pets into the water.
We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage weekly. The next sample collection is anticipated for Wednesday, September 14.
The Biological Field Station (BFS) collected samples for total microcystin analysis at the BFS and mid-lake on 13 September and around Otsego Lake 14 September 2022. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. HAB conditions were evident at several locations. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (13 September 2022) |
Total Microcystin (µg/L) |
|
Otsego Lake: Mid-Lake Surface |
4.0 µg/L |
|
4 meters depth (~13.1 feet) |
1.1 µg/L |
|
8 meters depth (~26.25 feet) |
0.7 µg/L |
|
12 meters depth (~39.4 feet) |
<0.15 µg/L |
|
BFS Thayer Boathouse Dock: Surface Accumulations |
>5 µg/L |
|
BFS Main Lab Dock: Surface Accumulations |
>5 µg/L |
|
Sample Location (14 September 2022) |
Total Microcystin (µg/L) |
Water Surface Conditions |
|
Otsego Sailing Club Docks |
3.0 µg/L |
No surface accumulations were visible, though microcystis colonies were visible and abundant. |
|
Three Mile Point Swim Area |
1.0 µg/L |
No surface accumulations were visible, though colonies were visible and abundant. |
|
5 Mile Point East End of Docks |
1.2 µg/L |
No surface accumulations visible in open water around docks but were beginning to form in boat slips. Colonies visible and abundant. |
|
BFS Thayer Boathouse Dock |
5.9 µg/L |
Surface accumulations present in open water around docks. |
|
BFS Thayer Boathouse Breakwater |
>5 µg/L |
Surface accumulations along breakwater forming ‘striations’. |
|
Springfield Public Landing Swim Area |
>5 µg/L |
Surface accumulations building in swimming area; Shoreline accumulation present near boat launch docks. |
|
Hyde Bay |
0.7 µg/L |
Water appeared turbid, colonies visible and abundant. |
|
Fairy Springs Park Swim Area |
0.6 µg/L |
No surface accumulations were visible; colonies visible in surface waters. Shoreline accumulation of white foam. |
|
Cooperstown Country Club Dock |
0.6 µg/L |
No surface or shoreline accumulations in open waters. Colonies visible. |
|
BFS Main Lab Dock |
0.3 µg/L |
Slight surface accumulations present in open water around dock. |
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: Collection began at 12:30pm at the BFS Main Lab Docks, followed by Fairy Springs Park, after which we proceeded clockwise around the lake. Weather conditions: part sun/clouds, breezy, winds out of the NW, though a slight onshore breeze was felt at several sites. Air temp 71° F. As noted above, surface and dense shoreline accumulations were several locations – samples were taken from docks, not directly from ‘scums’, unless noted. Lake users should check the shoreline conditions before allowing pets into the water.
We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage weekly. The next sample collection is anticipated for Monday, September 19.
The Biological Field Station (BFS) collected samples for total microcystin analysis at the BFS Thayer Boathouse on 17 September and around Otsego Lake on 20 September 2022. Surface temperatures have decreased slightly, but the cyanobacteria are still active. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. HAB conditions were evident at three locations. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (17 September 2022) |
Total Microcystin (µg/L) |
|
BFS Thayer Boathouse: Surface Accumulations |
>5 µg/L |
|
BFS Thayer Boathouse: End of Dock, no surface accumulations |
2.7 µg/L |
|
Sample Location (20 September 2022) |
Total Microcystin (µg/L) |
Water Surface Conditions |
|
Otsego Sailing Club Docks |
0.7 µg/L |
Calm water, no visible accumulations. Colonies visible in open water. |
|
Three Mile Point Swim Area |
1.1 µg/L |
No visible accumulations; colonies visible at moderate abundance. |
|
5 Mile Point East End of Docks |
1.3 µg/L |
No visible accumulations; colonies visible at moderate abundance. Surface accumulations were noted in boat slips. |
|
BFS Thayer Boathouse Dock |
1.1 µg/L |
No visible accumulations; colonies visible at moderate to high abundance. |
|
BFS Thayer Boathouse: Surface accumulation |
>5 µg/L |
Slight surface accumulation forming in protected area of dock, downwind. Wind from the N. |
|
Springfield Public Landing Swim Area |
1.6 µg/L |
Colonies visible at high abundance; surface foam present. Wind from the W. |
|
Springfield Public Landing: Shoreline accumulation near boat launch |
>5 µg/L |
Shoreline accumulation on the south side of boat launch docks. |
|
Hyde Bay |
1.0 µg/L |
Strong wind from W/NW. Water slightly turbid. Colonies visible. |
|
Fairy Springs Park Swim Area |
0.3 µg/L |
White foam and plant debris along shoreline. Colonies visible, relatively low in abundance. |
|
Cooperstown Country Club Dock |
0.7 µg/L |
Colonies visible, relatively low in abundance. |
|
BFS Main Lab Dock |
0.3 µg/L |
Colonies visible, relatively low in abundance. |
|
BFS Main Lab: Shoreline accumulation |
>5 µg/L |
Small accumulation (<1” wide) along protected shoreline. |
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L).
The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: Collection began at 12:00pm at the BFS Main Lab Docks, followed by Fairy Springs Park, after which we proceeded clockwise around the lake. Weather conditions: overcast to partly sunny with occasional rain showers, increasing winds out of the NW. Samples were taken from docks, unless noted as targeting an accumulation at the surface or shoreline. Lake users should check the shoreline conditions before allowing pets into the water.
We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage weekly. The next sample collection date is anticipated to be Monday September 26.
The Biological Field Station (BFS) collected samples for total microcystin analysis around Otsego Lake on 26 September 2022. Surface temperatures have decreased slightly, but the cyanobacteria are still active and abundant in surface waters throughout the lake. Results for each location are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. HAB conditions were evident at three locations. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location (26 September 2022) |
Total Microcystin (µg/L) |
Water Surface Conditions |
|
BFS Main Lab Dock |
0.6 µg/L |
Colonies visible. No accumulations present where the sample was collected; a small isolated shoreline accumulation was present South of the BFS docks. |
|
Fairy Springs Park Shoreline |
1.9 µg/L |
Colonies visible. No accumulations observed in the vicinity. White foam along shoreline. Wind onshore from SW. |
|
Cooperstown Country Club Dock |
0.5 µg/L |
Colonies visible. No accumulations observed in the vicinity. |
|
Otsego Sailing Club Docks |
0.5 µg/L |
Colonies visible. No accumulations observed in the vicinity. |
|
5 Mile Point East End of Docks |
0.3 µg/L |
Colonies visible. No accumulations observed in the vicinity. |
|
BFS Thayer Boathouse Dock |
0.7 µg/L |
Colonies visible. No accumulations observed in the vicinity. |
|
Springfield Public Landing Swim Dock |
0.6 µg/L |
Colonies visible. No accumulations observed; surface foam present. Heavy wind onshore from SW. |
|
Hyde Bay |
0.7 µg/L |
Colonies visible. No accumulations observed. Heavy wind onshore from W. |
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L).
The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: Collection began at 12:20pm at the BFS Main Lab Docks, followed by Fairy Springs Park, after which we proceeded clockwise around the lake. Weather conditions: 60F overcast to partly sunny with occasional rain showers, increasing winds out of the S/SW. Samples were taken from docks; no accumulations were targeted. Lake users should check the shoreline conditions before allowing pets into the water.
We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage weekly. The next sample collection date is anticipated for Monday, 10/3.
The Biological Field Station (BFS) analyzed samples for total microcystin analysis from Otsego Lake on 5 October 2022, prioritizing open water sampling at various depths. Surface temperatures have continued to decrease gradually, but the cyanobacteria are still active and abundant in surface waters throughout the lake and localized HAB conditions have been reported. Results for each location/water depth are below. We provide these results for informational purposes and to aid in decision-making; these results represent a snapshot in time. Bloom conditions are known to change quickly. When visible accumulations are present on the shoreline or the water surface, caution is warranted. A link to DOH guidance is below. The cyanobacteria causing the bloom is called Microcystis aeruginosa.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
|
Sample Location: Otsego Lake |
Total Microcystin (µg/L) |
Water Surface Conditions |
|
9/28/2022 BFS Main Lab Mid-Dock |
0.6 µg/L |
Colonies were visible in high abundance; no surface accumulations. |
|
BFS Main Lab End of Dock |
0.3 µg/L |
Colonies were visible, moderate abundance. No surface accumulations. |
|
10/4/2022 Mid-Lake (Near Data Buoy) |
|
|
|
Surface |
0.4 µg/L |
Colonies were visible, low-moderate abundance. |
|
4 meters (~13.1 feet) |
0.3 µg/L |
|
|
8 meters (~26.25 feet) |
0.5 µg/L |
|
|
12 meters (~39.4 feet) |
0.3 µg/L |
|
|
16 meters (~52.5 feet) |
<0.15 µg/L |
|
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: September 29 samples were taken to compare concentrations where the abundance of visible colonies noticeably increased from the end of the dock toward shoreline plant beds; localized shoreline accumulations were present but not sampled. October 4 sample collection was focused on open water samples to assess toxin concentrations from the surface down to approximately 16 meters. BFS Main Lab dockside was sampled for comparison. Weather conditions: 50F overcast, occasional rain showers, winds out of the N. No accumulations were targeted. Lake users should continue to check the shoreline conditions before allowing pets into the water.
We will continue to monitor toxin concentrations through October if necessary; we will post updates on the BFS homepage weekly.
To put these concentrations into context, according to the Department of Health Regulated Swimming Beaches are closed based on visual indication of a bloom and re-opened after the bloom has dissipated (visual assessment) and the total microcystin concentration is less than 4 ug/L in a sample collected the following day. Link to Dept. of Health Bloom Response and Regulated Beaches page
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Sample Location: Otsego Lake Collection date: 10/26/2022 |
Total Microcystin (µg/L) |
Water Surface Conditions |
|
Mid-Lake off Fairy Springs |
|
|
|
Surface |
< 0.15 µg/L |
Colonies visible, low-moderate abundance. Colonies were noticeably smaller than in early October. |
|
8 meters (~26.25 feet) |
< 0.15 µg/L |
|
|
12 meters (~39.4 feet) |
0.2 µg/L |
|
|
14 meters (~52.5 feet) |
< 0.15 µg/L |
|
|
BFS Main Lab Dock |
1.0 µg/L |
Colonies visible, moderate abundance. Slight surface accumulation intermixed with debris. |
Analysis Method: Total Microcystin ADDA ELISA (EPA Method 546); results in micrograms per liter (µg/L). The BFS is not an ELAP-certified laboratory.
Sample Collection Notes: October 26 sample collection was focused on open water samples to assess toxin concentrations from the surface down to approximately 14 meters. BFS Main Lab dockside was sampled for comparison. Weather conditions: 65°F, calm, mix of sun and clouds.
We will continue to monitor conditions through the fall, but this will be the last update on toxin concentrations for this season.
For More Information
- Willard Harman: Willard.Harman@oneonta.edu or phone (607) 547-6218
- Nancy Devins: Nancy.Devins@oneonta.edu or voicemail (607) 547-8778
Lake Management Graduate Program
Based at the Biological Field Station, SUNY Oneonta's Lake Management graduate program trains students to become effective water resource management professionals. Our innovative program blends scientific training in aquatic biology, limnology and quantitative skills with professional training in project design, management, and reporting in a real-life setting, working with lake stakeholders directly or with established lake management professionals. For program requirements and application materials, visit SUNY Oneonta's Biology Department Graduate Programs page.
About the Field Station
The Biological Field Station is a facility of SUNY Oneonta consisting of 2,600 acres with 12 major buildings that house laboratories, classrooms, conference spaces, offices and equipment for research support.
The Main Laboratory serves as a focus for analytical procedures essential for research activities in both aquatic and terrestrial environments. There is a large greenhouse, aquarium room, a unique multipurpose laboratory, four analytical laboratories, offices and conference spaces creating a compact and versatile research complex. Its location on Otsego Lake just north of the Farmer’s Museum in Cooperstown, NY, at the headwaters of the Susquehanna River is uniquely situated, and has the capacity to provide excellent opportunities for field studies by advanced undergraduate and graduate students.
The Thayer Farm, with access to the north end of Otsego Lake, contains the Hop House with three classrooms/laboratories, and office and conference spaces. The Upland Interpretive Center provides access to the farm and Rum Hill trails, maintains curated collections, serves as a trailhead shelter and includes a conference center/classroom, offices and additional space for research support. There is also a residential building, workshop, equipment bays and storage including space for more than 12 powerboats. The boathouse contains workspace, a laboratory/classroom, offices and a diving locker.
A new laboratory dedicated primarily to ornithology is located above Moe Pond on the Upper Research Site, the oldest of our research areas, serving since 1967. Greenwoods Conservancy and Cranberry Bog and its watershed are our most remote areas with resident populations of fisher and otter, endangered plants with few nuisance exotics present. A conference center/classroom, wet laboratory and residence provide excellent summer access.
Goodyear Swamp Sanctuary, at the north end of Otsego Lake, has historically been open to the public with trails and raised walkways; the boardwalk is currently closed to the public until further notice, as major repairs are needed. Funding for this work has been secured through a combination of generous donations, including a match by the Scriven Foundation, and a successful collaborative grant application with the Otsego County Conservation Association. Work is anticipated in 2022.