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Harmful Algal Blooms (HABs) Notifications Page

2016

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The map below displays the location of current HABs in New York State. Each location is labeled with a number that corresponds to the information in the table below.

There may be other waterbodies with blooms that have not been reported to the DEC.

This page provides information about the status of waterbodies with HABs. The information is collected through the 2016 DEC Lake Monitoring Program, Citizen Statewide Lake Assessment Program volunteers, partner HABs monitoring programs and from public reports.

Blooms of other algae are not reported here. See Important things to Know About HABs for tips on what to do when blooms are encountered.

Regulated swimming beaches are monitored regularly and evaluated for the presence of HABs. For information about regulated swimming beaches contact your local health department.

DEC encourages the public to view the HABs Archive page to be aware of lakes that were listed on the notification web page in previous years or removed from the current notification map.

For information about HABs on Lake Champlain, visit the Lake Champlain Committee monitoring page and the Vermont Department of Health's blue-green algae notification page (above two links leave DEC website.)

Map and table information is updated weekly.

This page was updated on 9/23/2016. DEC encourages the public to view the archive reports table to be aware of lakes that have been removed from the notification map.

Map of waterbodies sampled by DEC and those with HABs in NY.

Detailed map of HABs locations in NYC and LI

Waterbodies with HABs Notifications
Map Number Waterbody Name County Bloom Status Extent of Bloom Status Date Type of Report Change in Status
1 Agawam Lake Suffolk Confirmed with High Toxins Widespread/Lakewide 9/22/16 Lab sample Updated Listing
2 Alcove Reservoir Albany Confirmed Small Localized 9/20/16 Lab sample New
3 Allegheny Reservoir* Cattaraugus Confirmed Large Localized 9/15/16 Lab sample Updated Listing
4 Avon Marsh Dam Pond Livingston Suspicious Widespread/Lakewide 9/7/16 Visual report No Change
5 Barnum Pond Franklin Confirmed Large Localized 9/6/16 Lab sample No Change
6 Basic Creek Reservoir Albany Confirmed Large Localized 9/20/16 Lab sample New
7 Beaverdam Lake Orange Confirmed Open Water 9/12/16 Lab sample No Change
8 Bedford Lake Westchester Confirmed Not reported 9/18/16 Lab sample New
9 Big Reed Pond Suffolk Confirmed Widespread/Lakewide 9/14/16 Lab sample No Change
10 Black Lake* St. Lawrence Suspicious Not reported 9/16/16 Visual report No Change
11 Blind Sodus Bay Wayne, Cayuga Confirmed Widespread/Lakewide 9/13/16 Lab sample No Change
12 Blydenburg Lake Suffolk Confirmed Not reported 9/13/16 Lab sample No Change
13 Bowne Pond Queens Confirmed Not reported 9/13/16 Lab sample No Change
14 Canandaigua Lake* Ontario, Yates Confirmed Small Localized 9/7/16 Lab sample No Change
15 Cayuga Lake* Cayuga, Seneca Confirmed Small Localized 9/19/16 Lab sample Updated Listing
16 Cayuta Lake Schuyler Confirmed Widespread/Lakewide 9/7/16 Lab sample No Change
17 Central Bridge Reservoir Schoharie Confirmed Small Localized 9/21/16 Lab sample New
18 Chautauqua Lake* Chautauqua Confirmed with High Toxins Large Localized 9/5/16 Lab sample No Change
19 Chodikee Lake Ulster Suspicious Not reported 9/21/16 Visual report New
20 Craine Lake Madison Confirmed with High Toxins Not reported 9/7/16 Lab sample Updated Listing
21 Croton Falls Reservoir* Putnam Suspicious Large Localized 9/12/16 Visual report No Change
22 Deans Pond Cortland Confirmed with High Toxins Small Localized 9/10/16 Lab sample No Change
23 Durand Lake Monroe Confirmed with High Toxins Widespread/Lakewide 9/7/16 Lab sample Updated Listing
24 Findley Lake Chautauqua Confirmed Not reported 9/8/16 Lab sample No Change
25 Gilbert Lake Otsego Suspicious Not reported 9/9/16 Visual report No Change
26 Goose Pond Queens Suspicious Widespread/Lakewide 9/23/16 Visual report New
27 Guilford Lake Chenango Confirmed Widespread/Lakewide 9/7/16 Lab sample No Change
28 Harlem Meer New York Confirmed Large Localized 9/21/16 Lab sample Updated Listing
29 Hook Pond Suffolk Confirmed Not Reported 9/22/16 Lab sample New
30 Honeoye Lake* Ontario Confirmed Small Localized 9/19/16 Lab sample Updated Listing
31 Kissena Lake Queens Confirmed Not reported 9/13/16 Lab sample No Change
32 Lake Eaton Hamilton Suspicious Large Localized 9/3/16 Visual report No Change
33 Laurel Lake Broome Confirmed Large Localized 9/3/16 Lab sample No Change
34 Lawson Lake Albany Confirmed Open Water 9/20/16 Lab sample New
35 Long Pond Chenango Suspicious Not reported 9/22/16 Visual report New
36 Marratooka Lake Suffolk Confirmed Not reported 9/21/16 Lab sample New
37 Meadow Brook Pointe Suffolk Confirmed Widespread/Lakewide 9/20/16 Lab sample New
38 Mill Pond (Watermill) Suffolk Confirmed Widespread/Lakewide 9/22/16 Lab sample Updated Listing
39 Montgomery Lake Sullivan Confirmed Large Localized 9/11/16 Lab sample No Change
40 Moon Lake Jefferson Suspicious Not reported 9/19/16 Visual report Updated Listing
41 Mountain Lake Sullivan Confirmed Small Localized 9/8/16 Lab sample No Change
42 Nassau Lake Rensselaer Confirmed Widespread/Lakewide 9/21/16 Lab sample Updated Listing
43 Newark Reservoir Ontario Suspicious Widespread/Lakewide 9/16/16 Visual report No Change
44 Niger Pond Suffolk Confirmed Widespread/Lakewide 9/6/16 Lab sample No Change
45 North Sandy Pond* Oswego, Jefferson Confirmed Open Water 9/6/16 Lab sample No Change
46 Oneida River* Onondaga Confirmed Small Localized 9/20/16 Lab sample Updated Listing
47 Orange Lake Orange Confirmed Open Water 9/13/16 Lab sample No Change
48 Owasco Lake* Cayuga Confirmed with High Toxins Large Localized 9/19/16 Lab sample Updated Listing
49 Port Bay Wayne Confirmed Widespread/Lakewide 9/13/16 Lab sample No Change
50 Prospect Park Lake Kings Confirmed Widespread/Lakewide 9/19/16 Lab sample Updated Listing
51 Putnam Lake Putnam Confirmed Large Localized 9/18/16 Lab sample Updated Listing
52 Robinson Pond Columbia Confirmed Open Water 9/12/16 Lab sample No Change
53 Rockland Lake Rockland Suspicious Not reported 9/9/16 Visual report No Change
54 Rondout Creek* Ulster Confirmed Small Localized 9/19/16 Lab sample Updated Listing
55 Roth Pond Suffolk Confirmed Widespread/Lakewide 9/21/16 Lab sample Updated Listing
56 Round Lake Saratoga Confirmed Large Localized 9/22/16 Lab sample Updated Listing
57 Seneca Lake* Multiple Confirmed Small Localized 9/20/16 Lab sample New
58 Sixtown Pond/Crystal Lake Jefferson Confirmed Open Water 9/6/16 Lab sample No Change
59 Sodus Bay* Wayne Confirmed Large Localized 9/21/16 Lab sample Updated Listing
60 Song Lake Cortland Suspicious Large Localized 9/21/16 Visual report Updated Listing
61 South Sandy Pond Oswego Suspicious Widespread/Lakewide 9/6/16 Visual report No Change
62 Sturgeon Pool Ulster Suspicious Small Localized 9/15/16 Visual report No Change
63 The Lake in Central Park New York Confirmed with High Toxins Widespread/Lakewide 9/21/16 Lab sample Updated Listing
64 Tully Lake Cortland, Onondaga Confirmed Not reported 9/16/16 Lab sample New
65 Turtle Pond New York Confirmed Small Localized 9/21/16 Lab sample Updated Listing
66 Unnamed Pond (Delta Lake SP) Oneida Suspicious Widespread/Lakewide 9/8/16 Visual report No Change
67 Unnamed Lake (Milan) Dutchess Suspicious Small Localized 9/16/16 Visual report New
68 Wainscott Pond Suffolk Confirmed Widespread/Lakewide 9/14/16 Lab sample No Change
69 Wallkill River* Ulster, Orange Confirmed with High Toxins Large Localized 9/19/16 Lab sample Updated Listing

* Blooms 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.

This table reflected the status of harmful algal blooms as reported to DEC; public beach closure and drinking water information is available from your local health department.

The 2016 DEC Lake Monitoring Program includes the Lake Classification and Inventory Survey (LCI), the Citizens Statewide Lake Assessment Program (CSLAP) and several individual lake sampling programs. The map above shows locations sampled within the previous three weeks. For specific information about the current sampling results for lakes sampled through the 2016 DEC Lake Monitoring Program, contact the Division of Water at 518-402-8179.

Lake Champlain blooms are not reported here. For information about blue-green algae on Lake Champlain, visit the Lake Champlain Committee monitoring page and the Vermont Department of Health's blue-green algae notification page (above two links leave DEC website.)

Bloom Status

DEC HABs Program staff use visual observations, digital photographs and laboratory sampling results to determine whether a bloom consists of cyanobacteria (also known as blue-green algae) or another type of algae. A waterbody with a bloom may have one of three statuses: Suspicious, Confirmed or Confirmed with High Toxins Bloom.

  • Suspicious Bloom: DEC staff determine that conditions fit the description of a cyanobacteria bloom (HAB), based on visual observations and/or digital photographs. It is not known if there are harmful toxins or other compounds in the water. The bloom may be present in all or part of the waterbody. Laboratory analysis has not been done to determine if this is a HAB. Cyanobacteria are irritants to some people even if toxins are not present so all contact with the bloom should be avoided. Blooms may be present in all or part of the waterbody.
  • Confirmed Bloom: Water sampling results have confirmed the presence of a cyanobacteria HAB which may produce toxins or other harmful compounds.
  • Confirmed with High Toxins Bloom: Water sampling results have confirmed that there are toxins present in enough quantities to potentially cause health effects when people and animals come in contact with the water through swimming or drinking.

Extent of Bloom

The extent of the bloom is a rough estimate of the size of the bloom within the waterbody and is recorded by monitoring program staff or from public reports.

  • Small Localized: Bloom affects a small area of the waterbody, limited from one to several neighboring properties.
  • Large Localized: Bloom affects many properties within an entire cove, along a large segment of the shoreline, or in a specific region of the waterbody.
  • Widespread/Lakewide: Bloom affects the entire waterbody, a large portion of the lake, or most to all of the shoreline.
  • Open Water: Sample was collected near the center of the lake and may indicate that the bloom is widespread and conditions may be worse along shorelines or within recreational areas. Special precautions should be taken in situations when a Confirmed with High Toxins Bloom is reported with an Open Water extent because toxins are likely to be even higher in shoreline areas.

Important things to Know About HABs

  • If you see it - avoid it
  • People, pets and livestock should avoid contact with water that is discolored or has algae scums on the surface. Colors can include shades of green, blue-green, yellow, brown or red. If contact does occur, rinse thoroughly with clean water to remove algae.
  • Never drink untreated surface water, whether or not algae blooms are present. Untreated surface water may contain other bacteria, parasites or viruses, as well as cyanotoxins that could cause illness if consumed.
  • People not on public water supplies should not drink surface water during an algal bloom, even if it is treated, because in-home treatments such as boiling, disinfecting water with chlorine or ultraviolet (UV), and water filtration units do not protect people from HABs toxins.
  • Stop using water and seek medical attention immediately if symptoms such as vomiting, nausea, diarrhea, skin, eye or throat irritation, allergic reactions or breathing difficulties occur after drinking or having contact with blooms or untreated surface water.
  • Please report any health symptoms to your physician and NYS Department of Health at mailto:harmfulalgae@health.ny.gov or your local health department.
  • For answers to other frequently asked questions go to the DEC HABs FAQ page.
  • If you suspect that you have seen a HAB or you, your family, or pet has been in contact with a bloom, please report the bloom to the DEC. Fill out and submit a Suspicious Algal Bloom Report Form (PDF, 782 KB). Email the completed form and, if possible, attach digital photos (close-up and landscape to show extent and location) of the suspected bloom to HABsInfo@dec.ny.gov.

For more information you contact your regional DEC office or:

DEC HABs Program Coordinator
Rebecca Gorney Ph.D., Division of Water
Phone: (518) 402-8179

Email the DEC HABs Program

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Sign up for MakingWaves the Division of Water's weekly email subscription service to receive updates on HABs in New York waterbodies. MakingWaves provides information about important water-related issues, events, and news. To subscribe to MakingWaves, subscribe to GovDelivery (or see the box on the top of this page). When you reach the topics page, check the MakingWaves box under the Water category.