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NCEI's Updated and Expanded Groundbreaking Microplastics Database

Microplastics pollution is a growing concern, affecting coastal communities, marine ecosystems, human health, and the economy

Microplastics on a beach
Courtesy of NOAA

NCEI has updated and expanded the first-of-its-kind global microplastics database. This database collates microplastic data from across the globe, giving scientists and researchers a better understanding of microplastic’s impacts on human and marine health and the economy.

The Microplastic Menace

Plastic is the most prevalent type of marine debris found in the ocean and Great Lakes. While plastic debris can come in all shapes and sizes, those that are less than five millimeters in length (about the size of a sesame seed) are known as “microplastics.” 

Originating mostly from plastic material such as bottles and bags, microplastics can be found in nearly every part of our environment—oceans, rivers, estuaries, beaches, sea ice, sediments, and more. Most microplastics start their journey on land and are carried by rivers and wind to the ocean, where they are caught in the global ocean circulation system. Once microplastics are in the ocean, they accumulate in the food chain and pose a fatal threat to fish and other marine organisms that ingest them. 

This illustration shows the major ocean currents throughout the globe. Ocean currents act as conveyer belts for microplastics throughout the ocean. Courtesy of NOAA Ocean Explorer.

In coastal and inland areas, microplastic pollution is on the rise and is thought to be more ecologically damaging than microplastic pollution in the open ocean. Coastal waters and ecosystems such as estuaries, mangroves, reefs, and marshes are the main point of entry for microplastics into the ocean.

Human Impact

Since microplastics have been found to act as potential vectors for the transfer of toxic pollutants from the water to the marine food web, they pose a threat to the humans who ingest affected seafood. These ingested microplastics can bioaccumulate in humans through the consumption of seafood, eventually leading to inflammation, cell damage, and oxidative stress.

Besides posing a threat to human and marine health, microplastic pollution has steep economic impacts. About 20% of the global population relies on seafood for protein, and marine plastics endanger this food source by reducing the efficiency and productivity of aquaculture and commercial fisheries due to fish mortality and entangled fishing gear. It is estimated that there is a marine ecosystem loss of between $3,300 to $33,000 annually for each ton of plastic that enters the ocean. 

But these estimates do not include the economic costs to fisheries, shipping, and tourism. Some countries spend tens of millions of dollars annually cleaning up their beaches by removing litter, including microplastics. Studies in the United States have shown that residents avoid littered, local beaches in favor of cleaner beaches that were farther away and potentially costlier to reach. 

A Unified Database

As an emerging field of study, not a lot is known about microplastics and their impacts. One of the challenges to understanding microplastics is access to large-scale, long-term comprehensive data. Until recently, the management of marine debris data from large-scale visual surveys along the coast and in the open ocean has lagged behind the needs of the scientific and decision-making community.

To address the need for easy access to global microplastic data, NCEI has developed and is actively updating the publicly available Marine Microplastics Database. The database is a unique repository of marine microplastics concentrations that are aggregated, archived, and delivered in a consistent and reliable manner. These data have been provided by contributors from various citizen science efforts as well as published research cruises and fieldwork around the globe.

The Marine Microplastics Database map highlights the global distribution of data submitted from contributors around the globe. Courtesy of NCEI.

NCEI’s Marine Microplastics Database features extensive data and information on global microplastics found at the ocean surface, at depth, in sediments, and on beaches to better create a unified understanding of the global microplastic problem. There are also currently plans to include microplastic data from aquatic biota such as fishes, mammals and mollusks.

The microplastics database would not be possible without the help of data contributors. If you wish to submit your own microplastic data to the archive, please contact NCEI at You can find more information on submitting data at: