PFAS and Testicular Cancer

By David Meldofsky, California-licensed attorney · Founder, Lawsuit Informer

Last updated: June 1, 2026

Research has linked PFAS exposure, particularly the compound PFOA, to an increased risk of testicular cancer. Alongside kidney cancer, testicular cancer is one of the two cancers with the most consistent human evidence connecting it to PFOA, and it was among the conditions the C8 Science Panel identified as having a probable link. An established link is not the same as proof that PFAS caused any one person's cancer, which is a separate, fact-specific question.

For broader context, you can also start with PFAS water contamination lawsuits, review the current PFAS lawsuit update, or explore PFAS and kidney cancer and cancers linked to lawsuits.

Is There a Link Between PFAS and Testicular Cancer?

Yes, scientific research has identified an association between exposure to certain PFAS, especially PFOA, and an increased risk of testicular cancer. Together with the kidney, the testicles have been one of the most consistently reported cancer sites in studies of people exposed to PFOA. This is one reason testicular cancer is frequently discussed in PFAS contamination research and litigation.

As with any environmental exposure, an association means that a more highly exposed group developed the cancer at higher rates than a comparison group. That is different from proving, in any individual case, that PFAS was the cause of that person's cancer. Individual causation depends on exposure level, duration, timing, and personal risk factors.

What the Research Shows

A few major lines of research inform the current understanding of PFAS and testicular cancer:

• The C8 Science Panel. After litigation over PFOA contamination from a chemical plant in the Mid-Ohio Valley, an independent science panel studied roughly 69,000 highly exposed residents. The panel concluded there was a "probable link" between PFOA exposure and testicular cancer, as well as kidney cancer, thyroid disease, ulcerative colitis, pregnancy-induced hypertension, and high cholesterol.
• Occupational and military studies. Subsequent research has examined elevated PFAS levels in firefighters and military personnel exposed to aqueous film-forming foam, with testicular cancer among the outcomes studied in some of these populations.
• The IARC classification. In 2023, the International Agency for Research on Cancer, part of the World Health Organization, classified PFOA as carcinogenic to humans (Group 1). Its evaluation cited positive associations including kidney and testicular cancer.

Why the Testicles May Be Affected

PFAS such as PFOA are understood to act as endocrine disruptors, meaning they can interfere with the body's hormone systems. Because the development and function of testicular tissue is closely tied to hormone signaling, researchers have examined whether long-term PFAS exposure could affect that tissue in ways relevant to cancer development.

Researchers have also studied how PFAS may influence oxidative stress and cellular processes more broadly. The exact biological mechanisms are still being investigated, but the combination of human epidemiological associations and mechanistic plausibility is part of why scientific and regulatory bodies have treated the testicular cancer findings seriously.

Which PFAS Are Involved

PFAS are a large class of thousands of chemicals that have not all been studied equally. The strongest human evidence regarding testicular cancer involves PFOA, one of the most widely produced and best-studied PFAS. For most other individual PFAS compounds, the available human data on testicular cancer specifically is more limited.

To learn more about the chemicals and the broader category of claims, see PFAS water contamination lawsuits and PFAS consumer product lawsuits.

How People Are Exposed

Testicular cancer concerns in PFAS research are usually tied to long-term exposure rather than a single event. The most commonly discussed exposure routes include:

• Contaminated public drinking water or private wells
• Living near manufacturing facilities, military bases, airports, or fire training sites
• Occupational exposure, including firefighting and chemical manufacturing
• Aqueous film-forming foam, often discussed in AFFF firefighting foam lawsuits

Symptoms of Testicular Cancer

Testicular cancer is often first noticed as a change in one of the testicles. Possible signs include:

• A painless lump or swelling in a testicle
• A feeling of heaviness in the scrotum
• A dull ache in the lower abdomen or groin
• A change in how a testicle feels, or its size

These signs can have many causes unrelated to cancer. Only a qualified physician can evaluate them and make a diagnosis. This page is not a substitute for medical care.

PFAS, Testicular Cancer, and Lawsuits

Testicular cancer is one of the injuries most frequently discussed in PFAS and AFFF firefighting foam litigation. Individual injury claims generally turn on the person's exposure source, the timing and nature of the diagnosis, supporting medical records, and the applicable filing deadline. These individual claims are separate from public water system settlements, which generally address testing and cleanup costs rather than personal injury.

For the legal side, see Cancers Linked to Lawsuits, AFFF Firefighting Foam Lawsuits, and the PFAS Lawsuit Statute of Limitations by State. For general next steps, review What Evidence Helps a Lawsuit?, What Happens After You Contact a Lawyer?, and How Lawsuits Work.

Common Questions About PFAS and Testicular Cancer

Does PFAS cause testicular cancer?

Research has linked PFAS exposure, particularly PFOA, to an increased risk of testicular cancer, and the C8 Science Panel found a probable link in a highly exposed population. An established association is not the same as proof that PFAS caused any individual person's cancer, which depends on that person's exposure history, diagnosis, and other risk factors.

Why are testicular and kidney cancer the two most discussed in PFAS cases?

They are the two cancers with the most consistent human evidence linking them to PFOA exposure, including findings from the C8 Science Panel and the basis cited by the International Agency for Research on Cancer. Learn more about PFAS and kidney cancer →

Who is most at risk of PFAS-related testicular cancer?

Concern has centered on people with long-term exposure to PFOA-contaminated drinking water and on occupational groups such as firefighters exposed to AFFF. Testicular cancer most often affects younger and middle-aged men, but risk in any individual depends on exposure and personal factors.

Can people with testicular cancer file a PFAS lawsuit?

Testicular cancer is one of the injuries discussed in PFAS and AFFF firefighting foam litigation. Whether a particular person has a claim depends on their exposure source, diagnosis, medical records, and their state's filing deadline, and should be reviewed with qualified counsel.

Sources

• C8 Science Panel, Probable Link Evaluation reports, Mid-Ohio Valley PFOA studies.
• International Agency for Research on Cancer (IARC), Monographs evaluation of PFOA and PFOS, 2023.
• Agency for Toxic Substances and Disease Registry (ATSDR), Toxicological Profile for Perfluoroalkyls.
• U.S. Environmental Protection Agency, PFAS health effects materials.

Related PFAS and Illness Guides

About the Author

David Meldofsky is a California-licensed attorney and the founder of Lawsuit Informer.

He writes about lawsuits, toxic exposures, consumer safety issues, and legal process topics for readers seeking clear, accessible educational information.

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The information on this page is provided for educational purposes and does not constitute legal advice.