America's Dirtiest Lake For Swimming In 2026 Is A Popular Destination In Utah
Less than an hour from Salt Lake City, Utah's Great Salt Lake has long been an intriguing travel destination. Visitors enjoy swimming here because the high salt content makes you float easily, plus some sections, like the Spiral Jetty and Stansbury Island, feature uniquely pink water. However, it seems that this lake has some glaring drawbacks. In 2026, Lake.com aimed to rank the cleanest and dirtiest United States lakes by sifting through data from the National Water Quality Monitoring Council (NWQMC), an organization that samples water around the country. After reviewing this organization's research, Lake.com declared Great Salt Lake as the dirtiest lake in the U.S.
The NWQMC tests the levels of total dissolved solids (TDS) in water samples. These are minerals like sulfates, chlorides, calcium, magnesium, potassium, sodium, and bicarbonates. Too much of these substances makes the water dangerous to ingest. The NWQMC showed that the Great Salt Lake had a TDS level of 134,500 milligrams per liter (mg/L). When Lake.com compared this to 100 of the country's biggest lakes, it found that this number was much higher than the others on the list. For further context, Penn State Extension claims that even a TDS measurement above 1,000 mg/L could be cause for alarm. While TDS can come from natural sources, scientists also link TDS to human-made sources like urban sewage, pesticides, and industrial wastewater. This is why high TDS often means high pollution. And yet, the Great Salt Lake is one of Utah's most popular tourist destinations.
The Great Salt Lake still has plenty of fans
Great Salt Lake is the largest saltwater lake in the western hemisphere, and its visitors bring in about $1.3 billion to Utah's tourist economy. Yet, its water also contained more ammonia than other lakes in the Lake.com report, with 0.92 mg/L. While ammonia does occur in nature, it is a poisonous gas common in chemical fertilizers for the agriculture industry. Metal from mines and oil refineries in this part of Utah doesn't help the situation either. What's worse, the Great Salt Lake is a terminal lake, meaning it has no outlets like rivers or creeks that could help disperse the elements contributing to its pollution. The water only evaporates, leaving behind these solids and minerals.
According to Wasatch Magazine, plenty of locals avoid swimming in Great Salt Lake. However, Reddit users in the r/Utah subreddit prove that not everyone is bothered by the stinky water and nearby manufacturing facilities. Redditor u/dontnoticethispls stated, "I recommend going up to the spiral jetty and walking out into the pink water. It's an amazing experience." U/saltyweld called it "surreal," while former park ranger u/Whatsyournameeee insisted the organisms in the water keep it clean and said taking a dip in the Great Salt Lake is "a once in a lifetime experience to float and not sink!" Others pointed out that the salty residue is easy to simply rinse off after your aquatic adventure. Some bring their own water, but there are showers at Great Salt Lake State Park and the Great Salt Lake Marina.
There are ways to enjoy the Great Salt Lake without getting into the water
If you find the Great Salt Lake's water quality off-putting, there are still ways to enjoy it while staying dry. Utah is an amazing state for your next mountain biking adventure, and Antelope Island State Park is the perfect place for this outdoorsy activity. This International Dark Sky Park is located on the Great Salt Lake's Antelope Island, a huge peninsula jutting out into the southeast section of the lake. Mountain biking here comes with plenty of lake views, especially on the slightly rocky 1.5-mile Elephant Head trail and the 11.7-mile Split Rock Loop trail.
Get close to the water on foot as well. Near Antelope Island's visitor center is the trailhead for Lady Finger Point, a family-friendly hiking trail with more wide open Great Salt Lake views as far as the eye can see. Visitors also love Antelope Island because it is one of the best parks outside of Yellowstone to see wild bison. Against backdrops of mountains and the lake itself, these free-range herds roam throughout the island, but you might still bring binoculars in case they aren't venturing close to roads and trails.