Every so often a piece of data is so intuitive that it seems to settle an argument on its own. The glyphosate “cancer hot spot” maps that circulated in 2026 are exactly that kind of data. Color a U.S. map by how much glyphosate each county sprays, lay it over a map of non-Hodgkin lymphoma rates, and the two light up in many of the same places — the corn-and-soybean belt of the Upper Midwest above all. It looks like a smoking gun. Understanding why it is powerful evidence and yet not proof of any single case is one of the most useful things a person weighing a Roundup claim can learn.
What the County “Hot Spot” Maps Actually Found
In March 2026, the nonprofit advocacy group Food & Water Watch released a county-level analysis that paired two public datasets: the U.S. Department of Agriculture’s data on agricultural glyphosate use and the National Cancer Institute’s State Cancer Profiles, which track cancer incidence down to the county. The finding that drew attention: roughly 60 percent of the counties in the top fifth for glyphosate application had non-Hodgkin lymphoma (NHL) rates above the national average. The overlap was tightest in Midwest farm country. In Iowa — a state that ranks second nationally for overall cancer incidence and is one of only a handful where cancer rates are still rising — 82 percent of the heavy-spray counties showed elevated NHL rates.
“It is compelling that many of the counties that use the most glyphosate are also ‘hot spots’ for non-Hodgkin lymphoma,” said Amanda Starbuck, the group’s research director. The word compelling is well chosen. This is what epidemiologists call an ecological study — one that compares whole populations (here, counties) rather than tracking individual people. Ecological patterns are genuinely useful for generating and supporting hypotheses, and this one points in the same direction as decades of person-level research. But the same feature that makes the map easy to read is the feature that limits what it can prove.
The Ecological Fallacy: Why a Map of Counties Isn’t a Statement About a Person
The trap here has a name. The ecological fallacy is the error of assuming that a relationship seen at the group level automatically holds for any individual within the group. If a county sprays a great deal of glyphosate and has high lymphoma rates, it is tempting to conclude that the two are joined in each resident. But counties differ from one another in dozens of ways at once. Heavy-spray counties are rural and agricultural, which means their residents also differ from the national average in other exposures — other pesticides, diesel and engine exhaust, solvents, well-water contaminants, and occupational hazards of farming — as well as in age structure, access to specialty medical care, and how consistently cancers are diagnosed and reported. Any of those could contribute to a county’s lymphoma rate. The map cannot separate them.
Even advocates for tighter regulation say so plainly. Sarah Green of the Iowa Environmental Council, commenting on the same analysis, noted that farm communities face many simultaneous chemical exposures and cautioned that “correlation does not equal causation,” calling for more rigorous research. That is not a retreat from the science; it is the science being honest about what one type of study can and cannot do. In court, this same distinction is the difference between general causation — can this substance cause this disease in people at all — and specific causation — did it cause the disease in this plaintiff. County maps speak to the first question. They are silent on the second.
Why the Pattern Still Matters: Person-Level Science and the Seattle Statement
None of this means the map is noise. It matters precisely because it converges with stronger, individual-level evidence that has been accumulating for years. The foundation is the World Health Organization’s International Agency for Research on Cancer (IARC), which classified glyphosate as “probably carcinogenic to humans” (Group 2A) in 2015, based largely on the human evidence for non-Hodgkin lymphoma and supported by strong evidence of genotoxicity. A 2019 meta-analysis in Mutation Research by University of Washington and other researchers reported an increased NHL risk among the most heavily exposed. We explain how that body of work squares with the EPA’s different conclusion in our piece on why IARC and the EPA disagree about glyphosate.
That convergence is what the Seattle Statement on Glyphosate and Public Health underscored. Adopted at a symposium held March 25–26, 2026, at the University of Washington and signed by roughly 50 scientists and health professionals — including epidemiologists, toxicologists, and cancer specialists from U.S. universities, the CDC, the National Cancer Institute, and institutions in Europe and Canada — the statement concluded that glyphosate and glyphosate-based herbicides can harm human health, with the strongest epidemiological evidence linking exposure to non-Hodgkin lymphoma. Lianne Sheppard, a University of Washington professor and a signatory, has pointed to the accumulating evidence that glyphosate-based herbicides damage DNA and interfere with DNA-repair mechanisms — a person-level, biological finding, not a map. The statement urged the EPA and Europe’s EFSA to treat glyphosate as hazardous and act without further delay.
Read together, the picture is coherent: laboratory evidence of how glyphosate damages cells, person-level epidemiology showing elevated NHL risk in the exposed, and now a population-level map that lands in the same farm regions where exposure is heaviest. The map is the least precise layer of that stack, but it is pointing the same way as the more precise layers beneath it.
A Trial Lawyer’s Read: How Geography Fits an Individual Case
At our firm, Alex Alvarez, our Managing Partner and a Board Certified Civil Trial Lawyer, treats population data for exactly what it is worth — useful context for the general-causation backbone of the litigation, and nothing that decides an individual’s claim. A Roundup case is not proven by a plaintiff’s ZIP code. It is built from a documented history of how, when, and for how long that person actually used or was exposed to Roundup, paired with a qualifying diagnosis. Herb Borroto, M.D., J.D., our Medical-Legal Expert, reads the pathology and the exposure record himself, because whether a particular non-Hodgkin lymphoma fits the science depends on details a map will never contain: the subtype, the confirmed exposure route, and the timeline.
That is why the maps cut both ways, and why two opposite misreadings are equally wrong. A person in a Midwestern hot-spot county does not automatically have a case — there still has to be real, documented Roundup exposure and a qualifying diagnosis. And a person in a suburb far from any farm is not disqualified — homeowners, landscapers and groundskeepers, and people exposed through take-home or bystander pathways are evaluated on their own facts, wherever they live. The county map is background. The case is the individual record. Our overview of who qualifies for a Roundup lawsuit walks through what that record needs to contain.
Where This Fits After Durnell
The legal terrain shifted in 2026. In Monsanto Co. v. Durnell, decided June 25, 2026, the U.S. Supreme Court held 7–2 that federal law preempts state-law failure-to-warn claims where the EPA approved a pesticide label without a cancer warning. That narrowed one avenue. It did not touch the theory The Alvarez Law Firm leads with: strict product liability based on design defect — the argument that the product was unreasonably dangerous as formulated, independent of any label or agency finding.
The geographic and consensus evidence speaks directly to that surviving theory. A design-defect claim asks whether the formulation itself was unreasonably dangerous to the people who used it as intended; convergent human, mechanistic, and now population-level evidence that glyphosate use tracks with lymphoma is exactly the kind of proof that question invites. It does not depend on whether the government required a warning — and the sharper the science, the more directly it speaks to design defect.
What This Means If You Were Diagnosed
A few practical takeaways from the hot-spot maps:
- The maps are real, and they point the right way. Heavy-glyphosate counties do tend to have higher NHL rates, and that pattern converges with person-level science and the 2026 Seattle Statement.
- But a map is not a diagnosis of cause. Ecological studies compare populations. They support general causation; they cannot establish that glyphosate caused any specific person’s cancer.
- Your county neither makes nor breaks a claim. A case turns on documented personal exposure and a qualifying diagnosis, evaluated under the relevant state’s law — not on geography.
- Deadlines run on their own clock. Filing windows vary by state and are usually governed by a discovery rule, so the timeline is worth having reviewed rather than assumed. See can I still sue Monsanto over Roundup in 2026.
Nothing here is a prediction about any particular case or a promise of any result. Whether a specific claim can move forward depends on the diagnosis, the exposure record, and the law of the state where the case belongs, evaluated on the individual facts.
Frequently Asked Questions
Do people in high-glyphosate counties get more non-Hodgkin lymphoma?
A 2026 county-level analysis by the nonprofit Food & Water Watch, which paired USDA glyphosate-use data with National Cancer Institute cancer profiles, found that about 60 percent of the counties in the top fifth for glyphosate application had non-Hodgkin lymphoma rates above the national average, and that 82 percent of Iowa’s heavy-spray counties did. That is a real geographic pattern consistent with the science. But a county-level correlation compares places, not people. It cannot show that any individual’s cancer was caused by glyphosate, because many factors differ between rural farming counties and the rest of the country.
Does living in a glyphosate “hot spot” county mean I automatically have a Roundup case?
No. A hot-spot map is population-level evidence; it does not establish that any one resident was personally exposed to Roundup or that a specific cancer was caused by it. An individual Roundup case is built on a documented personal exposure history and a qualifying diagnosis such as non-Hodgkin lymphoma, evaluated under the law of the relevant state, not on the county someone lives in. Geography can be part of the background picture, but it is never a substitute for the individual facts.
I don’t live in a farming hot spot. Can I still have a Roundup claim?
Possibly. Because the county maps compare populations rather than individuals, they say nothing about a specific person one way or the other. Homeowners, landscapers, groundskeepers, and people exposed through take-home or bystander pathways can be evaluated regardless of where they live. What matters is a documented history of Roundup exposure and a qualifying diagnosis, not whether a person’s county appears on a glyphosate map.
What is the Seattle Statement on glyphosate?
The Seattle Statement on Glyphosate and Public Health is a scientific declaration adopted at the Seattle Glyphosate Symposium held March 25 and 26, 2026, at the University of Washington and signed by roughly 50 scientists and health professionals. It concludes that glyphosate and glyphosate-based herbicides can harm human health, with the strongest epidemiological evidence linking exposure to non-Hodgkin lymphoma, and it calls on regulators including the EPA and Europe’s EFSA to treat glyphosate as hazardous and act without further delay. It reflects expert consensus, not a court finding about any individual case.
Bottom Line
The glyphosate hot-spot maps are a vivid, honest piece of evidence, and they deserve the attention they got: the counties that spray the most glyphosate really do tend to carry higher non-Hodgkin lymphoma rates, and that finding sits alongside a large body of person-level research and a 2026 scientific consensus pointing the same direction. But a map that compares counties is the wrong tool for the one question a person diagnosed with cancer most wants answered — what happened to me — because it was never designed to compare individuals. That question is answered case by case, from an exposure record and a diagnosis, not from a color on a map.
At our firm, Herb Borroto, M.D., J.D., our Medical-Legal Expert, reads the pathology and the exposure history himself, and Alex Alvarez, Managing Partner and Board Certified Civil Trial Lawyer, evaluates which legal theory those facts can support. If you or a family member used Roundup and were later diagnosed with Non-Hodgkin Lymphoma, B-cell Lymphoma, Chronic Lymphocytic Leukemia, or Multiple Myeloma, the free case review is exactly what it says: no obligation, and no fee unless we recover for you.