Science Inventory

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Antimicrobial (AMR) research at the EPA has resulted in the publication of  3 new journal articles since Sept. 2024 when this dynamic graphic summary that was last updated.  Major points from these papers include: 1. Microplastic surfaces encourage biofilm formation, enriching a...

Cyanobacteria associated with Harmful Algal Blooms (HABs) can release highly potent toxins, known as cyanotoxins, which can be deadly to humans, pets, and livestock. Acute and chronic effects are not well characterized across the diversity of cyanotoxins or the potentially expose...

Cyanobacteria associated with Harmful Algal Blooms (HABs) can release toxins known as cyanotoxins, which can be deadly to humans, pets, and livestock. There are U.S. federal and state human health advisory thresholds and recreational and ambient water quality criteria for several...

Frequent and severe occurrences of harmful algal blooms (HABs) pose a growing threat to human health. Due to increasing incidents of HAB-related Do Not Drink/Do Not Boil orders reflecting unsafe levels of microcystins (MCs) in finished waters, urgent attention has been given to m...

The global expansion of harmful algal blooms (HABs) poses an increasing threat to public health. While the aerosolization of toxins from marine HABs (red algae) have been well documented, little information is available on the inhalation of aerosolized cyanotoxins in association ...

Frequent and severe occurrences of harmful algal blooms (HABs) increasingly threaten human health. Urgent attention is directed toward managing microcystins (MCs), as evidenced by rising HAB-related Do Not Drink/Do Not Boil advisories due to unsafe MC levels in drinking water.  U...

The purpose of the study on health effects and toxicity is to develop data, methods, and tools to advance the understanding of adverse health impacts among people, other animals and plants that are associated with exposure to harmful algal blooms (HABs) from both planktonic and b...

M. aeruginosa fluorescent changes were observed using a Cytek Aurora spectral flow cytometer that contains 5 lasers and 64 narrow band detectors located between 365 and 829 nm. Cyanobacteria were treated with different concentrations of H2O2 and then monitored afte...

In a world with increasing environmental hazards, harms, and challenges, environmentally just outcomes require intentional and inclusive risk communication. Standard risk communication uses a deficit approach, sharing scientific information without intentional consideration of co...

Cyanobacteria associated with Harmful Algal Blooms (HABs) can release highly potent toxins, known as cyanotoxins, which can be deadly to humans, pets, and livestock. Acute and chronic effects are not well characterized across the diversity of cyanotoxins or the potentially expose...

This presentation gives an overview and update on EPA ORD’s HABs research since the last USACE Interagency workshop on Freshwater HABs. The legislative drivers related to freshwater HABs are explained. The research discussed provides stakeholders and decision-makers at the ...

Environmental changes impact people’s perceptions, values, and uses of waterbodies. Understanding the impacts of environmental changes can help improve governance, practitioner engagement, and user education. We will discuss the green infrastructure (GI) possibilities of cr...

Cyanotoxins associated with Harmful Algal Blooms (HABs) can be deadly to humans, pets, and livestock. Impacts of cyanotoxins on other organisms (e.g., microbes, plants, and wildlife) are not well characterized. Our goal was to comprehensively and systematically assemble available...

This presentation summarizes research on microcystins, the most common type of cyanotoxins in US freshwaters. It is a contaminant of concern in drinking and recreational freshwater. This information informs risk assessors and regulators of potential effects for human health by de...

What are Harmful Algal Blooms (HABs)? Most species of algae are not harmful, but sometimes certain types bloom in excessive amounts and can cause harm to health and economies. HABs, include both algae and cyanobacteria that can produce toxins and other irritants in freshwater.&nb...

Evaluate the use of biologically active drinking water filters for removal of HABs-related metabolites as measured using toxicity assays

Harmful Algal Blooms (HABs) are one of the primary impacts of excess nutrients in water bodies. The HABs research at EPA is focused on detection, toxicity, impacts to humans and biota, and the development of tools to mitigate exposure via predictive modeling and treatment technol...

The December 1-2, 2021 BOSC review is focused on the SSWR Nutrients and Harmful Algal Blooms (HABs) Topic, one of the three inter-related topics in the SSWR research portfolio. The Nutrients and HABs Topic consists of three Research Areas (RA): RA4 – Assessment and Manageme...

There is a lack of information to estimate safe exposure levels for freshwater aquatic life to  toxins produced by cyanobacteria. The uncertainty in concentrations and purity of standards for cyanotoxins, and potentially their cost, challenge their use for conducting acute a...

There is a lack of information to estimate safe exposure levels for aquatic life to natural toxins produced by cyanobacteria. The uncertainty in concentrations and purity of standards for cyanotoxins, and their high cost, challenge their use for acute and chronic toxicity tests. ...

Prymnesium parvum is an invasive algal species that forms harmful algal blooms (HABs) in inland environments and is responsible for devastating fish kills causing ecological and economic damage. While progress has been made in developing approaches to manage P. parvum blooms, man...

Harmful algal blooms are increasing in frequency, intensity, and geographic range, posing a risk to human, pets, and livestock; impacting recreation; and causing significant ecological and economic damage. Harmful algal blooms are complex ecological processes that are affected by...

This presentation gives a summary of what is known about anatoxin toxicity, occurrence, contribution of benthic cyanobacteria and specifically addresses levels of dihydroanatoxin-a found in Zion National Park.

Microcystins are common freshwater cyanobacterial toxins that affect liver function. The toxicities of five microcystin congeners (microcystin-LA (MCLA), MCLR, MCLY, MCRR, and MCYR) commonly observed in harmful algal blooms (HABs) were evaluated in BALB/c mice after a single oral...

As global air temperatures increase, lake surface water temperatures also increase. These increases will cause ecosystem changes that will impact all aspects of lake management, particularly related to harmful algal blooms (HABs). Increasing surface water temperatures can cause...