Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Harmful Algal Blooms and Drinking Water in Oregon
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By Oregon Water Science Center
November 20, 2025
What are CyanoHABs?
Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities
Cyanobacterial harmful algal blooms and U.S. Geological Survey science capabilities
Harmful algal blooms are a major environmental problem in all 50 states.
Harmful algal blooms affect aquatic ecosystems, endangered species, and drinking water supplies. They are increasingly a public health hazard, and future climate conditions are expected to produce even more favorable conditions for the growth of cyanobacteria, leading to earlier, more frequent, and larger algal blooms.
Over the past decade, various cyanotoxins including microcystins, anatoxin-a, and cylindrospermopsin have been detected in the surface waters of rivers around Oregon, including the Clackamas, North Santiam, and Tualatin River systems, which are important drinking water sources for a substantial number of Oregon’s residents. Harmful blooms have resulted in numerous water contact and recreational closures and health advisories in lakes, reservoirs, and rivers; dog deaths have been associated with exposure to cyanotoxins. Cyanobacterial blooms produce a range of materials (geosmin, organic matter, toxins) that are a threat to the quality of drinking water supplies and impose an increased burden on drinking water providers for monitoring and treatment. These issues are harder to address in a timely and effective manner when the sources and nature of the blooms are not entirely known.
Media
Sources/Usage: Public Domain. View Media Details
Cyanobacteria and Harmful Blooms (HABs)
Cyanobacteria are a ubiquitous and vital part of Earth's ecosystem, producing atmospheric oxygen through their photosynthesis for billions of years. Today, cyanobacteria continue to share vast amounts of oxygen from their photosynthesis in the ocean and are an important part of many aquatic food webs. They may “fix” atmospheric nitrogen that enhances crop yields and agricultural production. But under certain conditions, when nutrients, light, and proper habitat converge, cyanobacteria often grow into noxious and toxic harmful blooms (HABs) that threaten water quality, drinking water, endangered species and other aquatic life, and human health.
HABs occur in many different types of waterbodies, including drinking water reservoirs, lakes, and other ponded waters. In these environments, cyanobacteria outcompete other algae when the surface warms and the waterbody temperature stratifies. Under these conditions many types of algae sink into the dark depths, whereas the more "buoyant" cyanobacteria (which are rich with gas vesicles) remain higher in the water column, closer to the sun.
Blooms of cyanobacteria may also occur in rivers, both as suspended “seston” in large flowing rivers, as well as extensive growths along riverbeds and channel margins. The basal forms of cyanobacteria form slimy filamentous mats (Microcoelus, Oscillatoria, Phormidium), and globular or “ear” shaped rubbery colonies of Nostoc, which are found on rocks, logs, and freshly exposed faces of basalt. These growths are observed in the rivers draining the Western Cascades that are vital to Oregon’s population for providing municipal drinking water.
While not all cyanobacteria blooms are toxic, they may produce an array of compounds including potent liver toxins (hepatotoxins, such as microcystins and cylindrospermopsins) and neurotoxins (anatoxin-a and saxitoxin, for example) that are especially dangerous to dogs, and even large animals including sheep, mountain goats, and cattle. Cyanobacteria also produce lipopolysaccharides that are skin irritants and may pose other concerns for water contact recreationists. Cyanobacteria also produce compounds that can foul water supplies with unpleasant tastes and odors. HABs are increasingly a public health hazard, with increased efforts to combat HABs at the federal and state levels, including Oregon, California, and Washington.
Media
Sources/Usage: Public Domain. View Media Details
HABs in Oregon
In Oregon, HABs have potential to impact revenue from recreation, with numerous popular waterbodies having multiple advisories over the past decade due to HABs and the toxins they produce, including Detroit Lake, Timothy Lake, Tenmile Lake, Odell Lake, Upper Klamath Lake, and many others. HABs are not limited to one or two types of waterbodies; blooms of Dolichospermum (formerly Anabaena) are common in the large water storage reservoirs on the Willamette’s tributaries, and in several lakes in Lincoln and Clatsop Counties (Cullaby, Carnahan, Ten Mile, and Devils Lake, for example) where Gloeotrichia, Aphanizomenon, Microcystis, and other cyanobacteria can bloom during summer months. HABs in small agricultural (nursery) irrigation ponds have also led to releases of cyanotoxins downstream, sometimes impacting drinking water intakes. And in central Oregon, various stock ponds and reservoirs used for livestock watering have experienced HABs with resulting deaths of cattle. In one incident in 2017, 32 cattle perished near Lakeview.
Harmful algal blooms (HABs) have occurred in many of the large water storage reservoirs in the Willamette River Basin, resulting in health advisories for water contact recreation, and in 2018 for the first time in Oregon, a drinking water advisory due to cyanotoxins. A HAB in Detroit Lake during spring produced cyanotoxins that were transported downstream in the North Santiam River, affecting the State capital of Salem's drinking water for about a month. Similar types of cyanobacterial blooms occur in Blue River and Cougar Reservoirs, in the McKenzie River Basin, with similar threats to drinking water for the City of Eugene.
To address this issue, and to complement on-going limnological surveys, the USGS partnered with the City of Salem, the Eugene Water and Electric Board, and the U.S. Army Corp of Engineers to monitor algal blooms in Detroit Lake, Blue River Lake, and Cougar Lake - and the downstream rivers - using continuous water-quality monitors that transmit data to water treatment plant operators, dam operations, researchers and the public in near real-time.
Basic parameters, including water temperature, conductance, and turbidity, are collected vertically in the reservoirs approximately every meter for the top 10 meters, then every 5 meters down into the hypolimnion (bottom waters) to a maximum of 75-90 meters (230-295 feet) deep. HAB parameters include surrogates for algal biomass (total chlorophyll [fCHL] and blue-green pigment phycocyanin [PC]), indicators of photosynthetic activity (dissolved oxygen and pH) and fluorescing dissolved organic matter [fDOM] that is often a reliable surrogate for dissolved organic carbon. Each of these parameters is monitored hourly at the surface (~1-meter depth) and through the water column multiple times per day from locations near dams (at the log booms).
View Profile Analysis Tool - Detroit Lake, OR
View Profile Analysis Tool - Blue River Lake, OR
Data are available (per parameter) as:
- Profiles with a slider scale to portray conditions with depth over time
- Time-series plots, based on the hourly data collected at 1-meter depth
- Contours, color plots of parameter values by depth over time.
Media
Sources/Usage: Public Domain. View Media Details
When taken together with the downstream continuous water-quality monitors these data provide an early-warning indicator of an algal bloom in the reservoir, or the possible release and transport of algae downstream to drinking-water intakes. These data also provide insights into the evolution, behavior, and decay of the seasonal blooms which can inform management strategies, modeling, and perhaps prediction of blooms in the future.
USGS Laboratory Capabilities
The USGS Oregon Water Science Center has researched and implemented methods for the evaluation of cyanotoxins in water and in the cyanobacteria colonies on rock substrates and in river and lake/reservoir plankton. These included the use of passive samplers (Solid Phase Adsorption Toxin Trackers, or SPATTs), which concentrate cyanotoxins from the water column over time; these can be extracted and analyzed using Enzyme Linked Immunosorbent Assays (ELISA). Cyanotoxins currently analyzed at the USGS include total microcystins/nodularin (ADDA), cylindrospermopsin, saxitoxin, and anatoxin-a. Chlorophyll-a is also measured in the laboratory as an estimate of the total algal biomass in water, benthic, and plankton net tows.
Additional Resources
Oregon Health Authority
Oregon Department of Environmental Quality
U.S. Environmental Protection Agency
Below are other science projects associated with this project.
Filter Total Items: 15
Harmful Algal Blooms and Drinking Water in Oregon
Harmful algal blooms are a major environmental problem in all 50 states.
Multiscale comparison of hyperspectral reflectance from periphyton in three Oregon rivers used for municipal supply
In this study, USGS scientists from multiple centers used advanced hyperspectral imaging techniques to advance monitoring of attached benthic algae (periphyton) in Cascade Range rivers used for municipal water supply. Periphyton are naturally occurring, but excess growth can harm ecosystems and degrade raw and treated drinking water quality. In these rivers, periphyton contain cyanobacteria that...
Determination of Algal Toxin Concentrations in Surface Waters at National Parks
The U.S. Geological Survey, in partnership with the National Park Service began a project in 2012 exploring levels of the algal toxins in surface drinking water and recreational waters in 3 National Park Service Parks: Sleeping Bear Dunes National Lakeshore, Isle Royale National Park, and Pictured Rocks National Lakeshore.
Harmful Algal Bloom Monitoring in the Finger Lakes Region, New York
Background: Harmful algal blooms (HABs) are increasingly a global concern because they pose a threat to human and aquatic ecosystem health and cause economic damages. Cyanobacterial HABs (CyanoHABs) represent a substantial threat to drinking-water supplies, aquatic ecosystem health, and safe recreational uses of freshwater resources in New York. Toxins produced by some types of...
Harmful Algal Bloom (HAB) Science in Oklahoma and Texas
Many types of algae can cause HABs in freshwater ecosystems. The most frequent and severe blooms typically are caused by cyanobacteria, the only freshwater “algae” with the potential for production of toxins that can adversely affect human health. USGS Oklahoma-Texas Water Science Center (OTWSC) scientists studying HAB issues in water bodies throughout the United States, using a combination of...
Harmful Algal Blooms (HABs)
The USGS collaborates with local, state, federal, tribal, university, and industry partners to conduct the science necessary to understand the causes and effects of toxic HABs and inform water management and public health decisions. USGS is characterizing the life cycle of HABs, their asociated toxins, and the genes responsible for cyanotoxin production. This work is enhancing the ability of Great...
Harmful Algae Blooms (HABs)
Cyanobacterial harmful algal blooms (HABs) are increasingly a global concern because HABs pose a threat to human and aquatic ecosystem health and cause economic damages. Toxins produced by some species of cyanobacteria (called cyanotoxins) can cause acute and chronic illnesses in humans and pets. Aquatic ecosystem health also is affected by cyanotoxins, as well as low dissolved oxygen...
Using New Tools To Better Understand And Predict Harmful Cyanobacterial Algal blooms (HABs) At Ohio Lake Erie And Inland Beaches
In Ohio, local health officials and state agencies have identified the presence toxins associated with harmful algal blooms (HABs) caused by cyanobacteria during the summer and early fall seasons at recreational and water-supply lakes. The USGS, in cooperation with partner organizations, is monitoring recreational beaches and swimming areas in Ohio to better understand the link between...
USGS Study Identifies Factors Related to Cyanobacterial Harmful Algal Blooms
U.S. Geological Survey (USGS) scientists identified water-quality and environmental factors related to cyanobacterial harmful algal blooms at beaches in Ohio. This information was collected as part of a long-term plan to develop site-specific predictive models for microcystin concentrations.
OGRL Algal Toxins Methods of Analysis
Algal toxins are a group of toxic compounds produced by a range of photosynthetic freshwater and marine plankton. These toxins have the ability to cause sickness in animals and humans and in severe cases lead to death. OGRL has the ability to evaluate and conduct occurrence, fate, transport, effects, and treatability studies methods.
Algal Biomass Lab
The Ohio-Kentucky-Indiana Water Science Center Algal Biomass Laboratory processes samples for chlorophyll-a and nutrients. The analytical data for chlorophyll-a and pheophytin provided by USGS [periphyton samples collected by the Indiana Department of Environmental Management (IDEM)] are used by IDEM for water quality assessment and nutrient management planning.
Cyanobacterial (Blue-Green Algal) Blooms: Tastes, Odors, and Toxins
Freshwater and marine harmful algal blooms (HABs) can occur anytime water use is impaired due to excessive accumulations of algae. In freshwater, the majority of HABs are caused by cyanobacteria (also called blue-green algae). Cyanobacteria cause a multitude of water-quality concerns, including the potential to produce taste-and-odor causing compounds and toxins that are potent enough to poison...
Below are multimedia items associated with this project.
Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Cyanobacteria - Scytonema (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Scytonema (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Scytonema (blue green algae)
Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Cyanobacteria - Nostoc (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Dolichospermum (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Dolichospermum (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Dolichospermum (blue green algae)
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Harmful algal blooms are a major environmental problem in all 50 states.
Harmful algal blooms affect aquatic ecosystems, endangered species, and drinking water supplies. They are increasingly a public health hazard, and future climate conditions are expected to produce even more favorable conditions for the growth of cyanobacteria, leading to earlier, more frequent, and larger algal blooms.
Over the past decade, various cyanotoxins including microcystins, anatoxin-a, and cylindrospermopsin have been detected in the surface waters of rivers around Oregon, including the Clackamas, North Santiam, and Tualatin River systems, which are important drinking water sources for a substantial number of Oregon’s residents. Harmful blooms have resulted in numerous water contact and recreational closures and health advisories in lakes, reservoirs, and rivers; dog deaths have been associated with exposure to cyanotoxins. Cyanobacterial blooms produce a range of materials (geosmin, organic matter, toxins) that are a threat to the quality of drinking water supplies and impose an increased burden on drinking water providers for monitoring and treatment. These issues are harder to address in a timely and effective manner when the sources and nature of the blooms are not entirely known.
Media
Sources/Usage: Public Domain. View Media Details
Cyanobacteria and Harmful Blooms (HABs)
Cyanobacteria are a ubiquitous and vital part of Earth's ecosystem, producing atmospheric oxygen through their photosynthesis for billions of years. Today, cyanobacteria continue to share vast amounts of oxygen from their photosynthesis in the ocean and are an important part of many aquatic food webs. They may “fix” atmospheric nitrogen that enhances crop yields and agricultural production. But under certain conditions, when nutrients, light, and proper habitat converge, cyanobacteria often grow into noxious and toxic harmful blooms (HABs) that threaten water quality, drinking water, endangered species and other aquatic life, and human health.
HABs occur in many different types of waterbodies, including drinking water reservoirs, lakes, and other ponded waters. In these environments, cyanobacteria outcompete other algae when the surface warms and the waterbody temperature stratifies. Under these conditions many types of algae sink into the dark depths, whereas the more "buoyant" cyanobacteria (which are rich with gas vesicles) remain higher in the water column, closer to the sun.
Blooms of cyanobacteria may also occur in rivers, both as suspended “seston” in large flowing rivers, as well as extensive growths along riverbeds and channel margins. The basal forms of cyanobacteria form slimy filamentous mats (Microcoelus, Oscillatoria, Phormidium), and globular or “ear” shaped rubbery colonies of Nostoc, which are found on rocks, logs, and freshly exposed faces of basalt. These growths are observed in the rivers draining the Western Cascades that are vital to Oregon’s population for providing municipal drinking water.
While not all cyanobacteria blooms are toxic, they may produce an array of compounds including potent liver toxins (hepatotoxins, such as microcystins and cylindrospermopsins) and neurotoxins (anatoxin-a and saxitoxin, for example) that are especially dangerous to dogs, and even large animals including sheep, mountain goats, and cattle. Cyanobacteria also produce lipopolysaccharides that are skin irritants and may pose other concerns for water contact recreationists. Cyanobacteria also produce compounds that can foul water supplies with unpleasant tastes and odors. HABs are increasingly a public health hazard, with increased efforts to combat HABs at the federal and state levels, including Oregon, California, and Washington.
Media
Sources/Usage: Public Domain. View Media Details
HABs in Oregon
In Oregon, HABs have potential to impact revenue from recreation, with numerous popular waterbodies having multiple advisories over the past decade due to HABs and the toxins they produce, including Detroit Lake, Timothy Lake, Tenmile Lake, Odell Lake, Upper Klamath Lake, and many others. HABs are not limited to one or two types of waterbodies; blooms of Dolichospermum (formerly Anabaena) are common in the large water storage reservoirs on the Willamette’s tributaries, and in several lakes in Lincoln and Clatsop Counties (Cullaby, Carnahan, Ten Mile, and Devils Lake, for example) where Gloeotrichia, Aphanizomenon, Microcystis, and other cyanobacteria can bloom during summer months. HABs in small agricultural (nursery) irrigation ponds have also led to releases of cyanotoxins downstream, sometimes impacting drinking water intakes. And in central Oregon, various stock ponds and reservoirs used for livestock watering have experienced HABs with resulting deaths of cattle. In one incident in 2017, 32 cattle perished near Lakeview.
Harmful algal blooms (HABs) have occurred in many of the large water storage reservoirs in the Willamette River Basin, resulting in health advisories for water contact recreation, and in 2018 for the first time in Oregon, a drinking water advisory due to cyanotoxins. A HAB in Detroit Lake during spring produced cyanotoxins that were transported downstream in the North Santiam River, affecting the State capital of Salem's drinking water for about a month. Similar types of cyanobacterial blooms occur in Blue River and Cougar Reservoirs, in the McKenzie River Basin, with similar threats to drinking water for the City of Eugene.
To address this issue, and to complement on-going limnological surveys, the USGS partnered with the City of Salem, the Eugene Water and Electric Board, and the U.S. Army Corp of Engineers to monitor algal blooms in Detroit Lake, Blue River Lake, and Cougar Lake - and the downstream rivers - using continuous water-quality monitors that transmit data to water treatment plant operators, dam operations, researchers and the public in near real-time.
Basic parameters, including water temperature, conductance, and turbidity, are collected vertically in the reservoirs approximately every meter for the top 10 meters, then every 5 meters down into the hypolimnion (bottom waters) to a maximum of 75-90 meters (230-295 feet) deep. HAB parameters include surrogates for algal biomass (total chlorophyll [fCHL] and blue-green pigment phycocyanin [PC]), indicators of photosynthetic activity (dissolved oxygen and pH) and fluorescing dissolved organic matter [fDOM] that is often a reliable surrogate for dissolved organic carbon. Each of these parameters is monitored hourly at the surface (~1-meter depth) and through the water column multiple times per day from locations near dams (at the log booms).
View Profile Analysis Tool - Detroit Lake, OR
View Profile Analysis Tool - Blue River Lake, OR
Data are available (per parameter) as:
- Profiles with a slider scale to portray conditions with depth over time
- Time-series plots, based on the hourly data collected at 1-meter depth
- Contours, color plots of parameter values by depth over time.
Media
Sources/Usage: Public Domain. View Media Details
When taken together with the downstream continuous water-quality monitors these data provide an early-warning indicator of an algal bloom in the reservoir, or the possible release and transport of algae downstream to drinking-water intakes. These data also provide insights into the evolution, behavior, and decay of the seasonal blooms which can inform management strategies, modeling, and perhaps prediction of blooms in the future.
USGS Laboratory Capabilities
The USGS Oregon Water Science Center has researched and implemented methods for the evaluation of cyanotoxins in water and in the cyanobacteria colonies on rock substrates and in river and lake/reservoir plankton. These included the use of passive samplers (Solid Phase Adsorption Toxin Trackers, or SPATTs), which concentrate cyanotoxins from the water column over time; these can be extracted and analyzed using Enzyme Linked Immunosorbent Assays (ELISA). Cyanotoxins currently analyzed at the USGS include total microcystins/nodularin (ADDA), cylindrospermopsin, saxitoxin, and anatoxin-a. Chlorophyll-a is also measured in the laboratory as an estimate of the total algal biomass in water, benthic, and plankton net tows.
Additional Resources
Oregon Health Authority
Oregon Department of Environmental Quality
U.S. Environmental Protection Agency
Below are other science projects associated with this project.
Filter Total Items: 15
Harmful Algal Blooms and Drinking Water in Oregon
Harmful algal blooms are a major environmental problem in all 50 states.
Multiscale comparison of hyperspectral reflectance from periphyton in three Oregon rivers used for municipal supply
In this study, USGS scientists from multiple centers used advanced hyperspectral imaging techniques to advance monitoring of attached benthic algae (periphyton) in Cascade Range rivers used for municipal water supply. Periphyton are naturally occurring, but excess growth can harm ecosystems and degrade raw and treated drinking water quality. In these rivers, periphyton contain cyanobacteria that...
Determination of Algal Toxin Concentrations in Surface Waters at National Parks
The U.S. Geological Survey, in partnership with the National Park Service began a project in 2012 exploring levels of the algal toxins in surface drinking water and recreational waters in 3 National Park Service Parks: Sleeping Bear Dunes National Lakeshore, Isle Royale National Park, and Pictured Rocks National Lakeshore.
Harmful Algal Bloom Monitoring in the Finger Lakes Region, New York
Background: Harmful algal blooms (HABs) are increasingly a global concern because they pose a threat to human and aquatic ecosystem health and cause economic damages. Cyanobacterial HABs (CyanoHABs) represent a substantial threat to drinking-water supplies, aquatic ecosystem health, and safe recreational uses of freshwater resources in New York. Toxins produced by some types of...
Harmful Algal Bloom (HAB) Science in Oklahoma and Texas
Many types of algae can cause HABs in freshwater ecosystems. The most frequent and severe blooms typically are caused by cyanobacteria, the only freshwater “algae” with the potential for production of toxins that can adversely affect human health. USGS Oklahoma-Texas Water Science Center (OTWSC) scientists studying HAB issues in water bodies throughout the United States, using a combination of...
Harmful Algal Blooms (HABs)
The USGS collaborates with local, state, federal, tribal, university, and industry partners to conduct the science necessary to understand the causes and effects of toxic HABs and inform water management and public health decisions. USGS is characterizing the life cycle of HABs, their asociated toxins, and the genes responsible for cyanotoxin production. This work is enhancing the ability of Great...
Harmful Algae Blooms (HABs)
Cyanobacterial harmful algal blooms (HABs) are increasingly a global concern because HABs pose a threat to human and aquatic ecosystem health and cause economic damages. Toxins produced by some species of cyanobacteria (called cyanotoxins) can cause acute and chronic illnesses in humans and pets. Aquatic ecosystem health also is affected by cyanotoxins, as well as low dissolved oxygen...
Using New Tools To Better Understand And Predict Harmful Cyanobacterial Algal blooms (HABs) At Ohio Lake Erie And Inland Beaches
In Ohio, local health officials and state agencies have identified the presence toxins associated with harmful algal blooms (HABs) caused by cyanobacteria during the summer and early fall seasons at recreational and water-supply lakes. The USGS, in cooperation with partner organizations, is monitoring recreational beaches and swimming areas in Ohio to better understand the link between...
USGS Study Identifies Factors Related to Cyanobacterial Harmful Algal Blooms
U.S. Geological Survey (USGS) scientists identified water-quality and environmental factors related to cyanobacterial harmful algal blooms at beaches in Ohio. This information was collected as part of a long-term plan to develop site-specific predictive models for microcystin concentrations.
OGRL Algal Toxins Methods of Analysis
Algal toxins are a group of toxic compounds produced by a range of photosynthetic freshwater and marine plankton. These toxins have the ability to cause sickness in animals and humans and in severe cases lead to death. OGRL has the ability to evaluate and conduct occurrence, fate, transport, effects, and treatability studies methods.
Algal Biomass Lab
The Ohio-Kentucky-Indiana Water Science Center Algal Biomass Laboratory processes samples for chlorophyll-a and nutrients. The analytical data for chlorophyll-a and pheophytin provided by USGS [periphyton samples collected by the Indiana Department of Environmental Management (IDEM)] are used by IDEM for water quality assessment and nutrient management planning.
Cyanobacterial (Blue-Green Algal) Blooms: Tastes, Odors, and Toxins
Freshwater and marine harmful algal blooms (HABs) can occur anytime water use is impaired due to excessive accumulations of algae. In freshwater, the majority of HABs are caused by cyanobacteria (also called blue-green algae). Cyanobacteria cause a multitude of water-quality concerns, including the potential to produce taste-and-odor causing compounds and toxins that are potent enough to poison...
Below are multimedia items associated with this project.
Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Cyanobacteria - Scytonema (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Scytonema (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Scytonema (blue green algae)
Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Phormidium (blue green algae)
Cyanobacteria - Nostoc (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Nostoc spongiiforme (blue green algae)Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Nostoc spongiiforme (blue green algae)
Cyanobacteria - Dolichospermum (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Dolichospermum (blue green algae)
Microscopic view of blue green algae sample. Some algae produce toxins that threaten the health and safety of living things that come in direct contact. Cyanobacteria - Dolichospermum (blue green algae)
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)
Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)
Kurt Carpenter Inverview 1A - Minam River Algae (B-Roll)Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.