New Analysis Reveals Disturbing Geographic Patterns in U.S. Amyotrophic Lateral Sclerosis Deaths

A jarring new analysis of federal mortality records has exposed a disturbing geographic pattern in amyotrophic lateral sclerosis (ALS) deaths across America. The data suggests that the disease is not distributed evenly, hinting at environmental variables such as pollution, dietary habits, or light exposure patterns that may be driving diagnoses upward in specific regions.

The story gained national attention this month when NFL legend Chris Johnson appeared nearly unrecognizable on Good Morning America. Footage from just 14 months prior showed the former Tennessee Titans and New York Jets running back joyfully lifting his seven-year-old daughter onto his shoulders. In stark contrast, the current interview depicted the 40-year-old sitting motionless in a chair, communicating solely through an eye-controlled computer system. His wife, Brittany, described the heartbreaking reality that her husband can no longer lift a cup.

Johnson confirmed he is battling ALS, also known as Lou Gehrig's disease. This progressive neurological disorder destroys the nerve cells responsible for controlling movement, eventually stripping patients of their ability to walk, speak, swallow, and breathe. While roughly 10 percent of cases stem from inherited genetic mutations, the cause for the vast majority remains unknown. Researchers increasingly suspect that environmental factors play a significant role in triggering the illness in seemingly healthy adults during their prime working years.

An exclusive examination of figures held by CDC Wonder, the agency's mortality database, uncovered a striking divide between states. The analysis covered deaths recorded between 2018 and 2024, looking specifically at entries classified as motor neuron disease, since ALS is not listed as a separate category but accounts for approximately 85 percent of such fatalities. Death certificates provide a more reliable metric than voluntary case reporting estimates, allowing for a precise comparison across state lines.

The results indicate that adults in the Pacific Northwest and New England face the highest risks. Idaho, Oregon, and Wyoming recorded the nation's highest ALS death rates at 2.5 deaths per 100,000 residents. Minnesota followed closely with 2.4 per 100,000, while Kansas, Montana, and New Hampshire each registered a rate of 2.3 per 100,000. Conversely, parts of the South and Southwest, regions often associated with obesity but paradoxically showing lower disease rates, recorded significantly fewer deaths. Nevada and Hawaii stood at the opposite end of the spectrum with only 1.5 deaths per 100,000 residents.

Currently, approximately 33,000 people in the United States are living with ALS, a figure projected to climb to 36,000 by 2030. The disease predominantly affects white adults and men, typically developing between ages 55 and 75, though it can strike much younger individuals like Johnson, who was diagnosed at age 39 in 2025. Symptoms usually manifest as weakness in a single limb before rapidly spreading to cause almost complete paralysis.

There is currently no cure for the condition, although available medications can only slow its progression. Most patients survive between two and five years after diagnosis. As experts continue to scramble to understand why diagnoses are rising, this map highlights where information remains scarce and access to answers is limited, leaving families in these high-risk areas without clear guidance on prevention or mitigation strategies.

Florida trailed with 1.7 deaths per 100,000 residents, while Arizona, Arkansas, Delaware, Kentucky, Mississippi, New Jersey, and New York each registered a rate of 1.8. These statistics highlight a pronounced north-south divide in the United States, where clusters of the highest incidence rates appear across the Pacific Northwest, Upper Midwest, and New England, whereas several southern and southwestern jurisdictions report some of the lowest figures.

For decades, scientists have theorized that latitude might drive this disparity. The logic suggests that northern states receive less year-round sunlight, resulting in lower vitamin D levels, which could potentially elevate ALS risk. However, Dr. Eva Feldman, a neurologist and director of the ALS Centre of Excellence at the University of Michigan, argues that current evidence does not support this connection.

'It's only really in the last handful of years that we've got a good grasp on the geographic variability of ALS,' Dr. Feldman stated. She noted that studies have failed to demonstrate a clear association between ALS and vitamin D exposure, which remains consistently lower across northern states.

Another potential factor is age. A 2021 study examining high ALS rates in the Midwest proposed that the region's older population contributed to the trend, given that the disease is most frequently diagnosed between ages 55 and 75. Yet this explanation does not fully account for the data; Florida, often viewed as America's retirement capital, recorded one of the nation's lowest ALS death rates.

Consequently, researchers are shifting their focus toward environmental influences. 'ALS does appear to be more common in states with greater industrial or agricultural activity, where exposure to pollutants may be higher, although that link is far from proven,' Dr. Feldman explained. She emphasized that scientists remain in the very early stages of understanding what drives this variation.

This investigation comes amid high-profile cases, such as that of actor Eric Dane. Best known for his role as Dr. Mark Sloan on *Grey's Anatomy*, the 51-year-old was diagnosed with ALS in 2024 and passed away in February at age 53 after becoming a vocal advocate for awareness. Before his death, he left Toronto International Airport in October 2025 following an appearance at a premiere in June of that year. Dane grew up in San Francisco but frequently took annual fishing trips to the Kenai River in Alaska. State authorities have described the river as having a 'failing grade' for pollution, raising the prospect that environmental contamination may have contributed to his condition.

Similarly, Dr. Feldman is leading a 30-year study tracking thousands of workers in northern Michigan, an area with one of the nation's highest ALS death rates. She aims to determine if pollution plays a role, noting that the state's automotive industry and extensive cherry farming could expose residents to heavy metals and pesticides—two environmental factors currently under investigation.

The distribution of ALS mirrors that of multiple sclerosis, another autoimmune disorder, suggesting a possible link between the two conditions on mapped data. Despite these observations, the reasons why Idaho, Oregon, and Wyoming recorded the highest death rates remain unclear.

While scientists continue to probe broad causes for amyotrophic lateral sclerosis (ALS), investigators are increasingly turning their attention to more localized environmental factors that may explain regional spikes in the disease's prevalence. One prominent hypothesis centers on the false morel mushroom, a fungus that thrives abundantly across the Pacific Northwest. This theory gained traction following a 2021 study of an ALS cluster in a French Alpine village, where researchers noted that every one of the 14 diagnosed individuals had consumed these mushrooms, whereas unaffected residents had not. Although the study could not establish a definitive causal link, it sparked urgent calls for further investigation into this dietary exposure.

The false morel is widely distributed throughout the Pacific Northwest and parts of New England, regions that broadly mirror areas recording some of the nation's highest ALS death rates. Dr. Peter Spencer, who has examined this hypothesis, noted that mushroom foraging is particularly popular in the northern United States. Supporting data from poison control centers suggests that accidental false morel poisonings occur more frequently in certain northern states, specifically Idaho, where analyses have also identified elevated ALS mortality rates. The connection lies in the fungus's chemistry; false morels contain a toxin called gyromitrin, which the human body converts into monomethylhydrazine (MMH), a chemical capable of damaging nerve cells. Some researchers hypothesize that repeated exposure to this toxin could contribute to ALS development years later, though this remains unproven. It is worth noting that while true morels are a gourmet delicacy often found in high-end cuisine and Michelin-starred restaurants, they too must be cooked properly to avoid toxicity.

"It's an interesting theory," said Feldman regarding the mushroom connection. "We have no data to prove or disprove it either way." However, experts emphasize that there is currently no solid evidence linking false morel poisoning directly to ALS diagnoses in humans. Much more research is required before any firm conclusions can be drawn, and access to definitive historical health data remains limited.

Beyond mushrooms, other local environmental theories have emerged, particularly in Vermont, which recorded one of the country's highest ALS death rates. Researchers here suggest that cyanobacteria found in lakes and rivers—organisms that produce toxins capable of damaging nerve cells—could play a role, although evidence remains scarce. Dr. Melissa Schilling, a social sciences researcher at NYU who led a 2025 study into the geographic distribution of ALS, stated that her findings reinforce the growing belief that environmental factors contribute to the disease's onset.

"ALS research is a much bigger mess than Alzheimer's, which I've also worked on," Schilling explained. "It's super fragmented, and there are a lot of dead ends. It doesn't get nearly the amount of attention it deserves." Her data showed that ALS is more common in northern regions, though not following a perfect gradient. "I think this strongly suggests that something environmental is raising people's risk of developing ALS," she said. "It could be heavy metals, pollutants, sanitation systems, a virus or something else. We need to find the cause because, if we do, that opens up entirely new possibilities for how we can treat the disease."

Schilling's research also highlighted a remarkable similarity between the geographic distribution of ALS and multiple sclerosis, an autoimmune disease that attacks the central nervous system, suggesting the two conditions may share environmental triggers. Ultimately, what triggered specific cases like Johnson's illness is impossible to know with certainty. Scientists believe ALS develops through a complex interaction between genetic susceptibility and environmental exposures. While inherited genetic mutations account for approximately one in ten cases, researchers have linked head trauma, pesticides, heavy metals, and military service to an increased risk, although none has been proven to directly cause the disease. Johnson spent ten seasons in the NFL, where repeated blows to the head have long been a subject of concern within the sports community.

While certain studies indicate that individuals with a history of head trauma may face an elevated risk of developing amyotrophic lateral sclerosis (ALS), experts caution that the scientific evidence remains inconclusive and requires further investigation. The uncertainty surrounding this potential link underscores the complex nature of neurological research, where definitive conclusions often elude even dedicated investigators.

One patient fathered four children before facing his own health crisis. He described the initial emotional impact with stark honesty: "I don't know if you ever fully process it." His narrative highlights a common trajectory for those diagnosed with progressive conditions—moving quickly from disbelief to a critical decision point.

Following that period of shock, he noted that patients are left with two distinct paths forward. They can choose to surrender to the diagnosis or commit to an aggressive struggle against their illness. "At first, you're in shock," he explained. "Then you realize you have two choices. You can give up, or you can fight. I chose to fight." His decision reflects a resolve that many families must confront when limited medical resources and evolving science leave them navigating uncharted territory alone.