Why is the Great Salt Lake so toxic?

The Great Salt Lake contains arsenic and other metals that are naturally occurring, while some researchers say could even be human-caused. And as the lake shrinks, it has exposed some 800 square miles of exposed lakebed, equivalent to the entire surface area of Maui.



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Swimming in the Great Salt Lake is safe despite contaminants, researchers say - Axios Salt Lake City.

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Some of the waste water eventually found its way into the 008 outflow, a pipeline that runs beneath Interstate 80 and drains directly into the Great Salt Lake. State water-quality officials measured arsenic levels at 1.86 milligrams per liter (mg/L) at the outflow's discharge point.

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According to a recent study by Brigham Young University, it's possible that Great Salt Lake could dry up completely in the next five years.

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Water experts say it's going to take more than one big year to fill the Great Salt Lake. SALT LAKE CITY — Ever since The Great Salt Lake hit its lowest water level on record in November 2022, concerns over things like arsenic in the exposed lake bed have only grown.

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Less water going in means higher concentrations of salt and minerals, which threatens the crucial ecological role saline lakes play across the West, as well as the health of the people who live nearby.

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The shallow bottom of Great Salt Lake supports a microbial carpet that harness the sun's energy through the process of photosynthesis. This carpet is made up of a community of microbes, including several types of cyanobacteria (also known as blue-green algae), algae and other organisms.

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New analysis says Great Salt Lake can be saved, but not without great effort, and expense.

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The Great Salt Lake is home to many important biological and wildlife species, from archaea, to bacteria, to phytoplankton (400+ species). Perhaps the three most apparent species that can be seen with the naked eye are brine shrimp (tons), brine flies (billions) and birds (millions).

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Lake Karachay, a small lake in the southern Ural mountains in western Russia, is thought to be the most polluted spot on Earth. Starting in 1951, the Soviet Union used Karachay as a dumping site for radioactive waste from Mayak, a nearby nuclear waste storage and reprocessing facility located near the town of Ozyorsk.

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With a salinity level over 40 percent, Don Juan is significantly saltier than most of the other hypersaline lakes around the world. The Dead Sea has a salinity of 34 percent; the Great Salt Lake varies between 5 and 27 percent. Earth's oceans have an average salinity of 3.5 percent.

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So just how bad is it, really? A new scientific report warns the lake is on track to disappear in the next five years, unless water use is cut by as much as 50% annually.

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A recent report found that the lake could essentially disappear within five years. As a key stopover for migrating birds, the lake's loss could undermine whole ecosystems.

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Because of the abundant algae and halophiles, as well as the high salinity, the lake does not support fish — but it teems with brine shrimp and brine flies, which provide essential nutrition for migrating birds.

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The Great Salt Lake is the largest saltwater lake in the Western Hemisphere and the eighth-largest terminal lake in the world. It lies in the northern part of the U.S. state of Utah and has a substantial impact upon the local climate, particularly through lake-effect snow.



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The state of Utah owns basically most of the Great Salt Lake, including Antelope Island, Fremont Island, Gunnison Island, the Ogden and Farmington bay wetland areas, along with the entire lakebed.

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Compass Minerals announced in 2021 it was seeking to extract lithium from the Great Salt Lake under a pilot program. The company, which has a plant in Ogden, said it was utilizing new methods of extracting the precious resource within the ambient brine of the Great Salt Lake.

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One of the world's largest hypersaline lakes, the Great Salt Lake is on the verge of collapse due to climate change, drought, and population pressures that have reduced inflows and shrunk the lake by more than two-thirds.

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Great Salt Lake is the remnant of Lake Bonneville; a great ice age lake that rose dramatically from a small saline lake 30,000 years ago.

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