Agent Orange in Puerto Rico: How Veterans Can Prove Exposure and Win VA Benefits

Puerto Rico is not a presumptive Agent Orange location but veterans can still qualify for VA benefits by proving actual herbicide exposure and a current disability. If the condition is not presumptive, they must also provide medical evidence linking it to that exposure.

• Veterans who served in Puerto Rico are not presumed to have been exposed to Agent Orange. VA requires veterans to prove actual exposure based on their specific service records, duties, dates, and location.
• Historical records document limited herbicide testing in certain parts of Puerto Rico. Those records do not support the claim that Agent Orange was used across the entire island or at every military base.
• Service at Ramey Air Force Base, Roosevelt Roads, Fort Buchanan, or Vieques does not prove Agent Orange exposure by itself. The evidence must connect the veteran to a documented testing area or exposure event.
• Multiple legal paths remain available. Once exposure is proven, a presumptive condition may qualify without a separate nexus opinion. A non-presumptive condition generally requires medical evidence linking it to the exposure.

Where Was Agent Orange Used in Puerto Rico?

Historical records document limited tactical herbicide testing in Puerto Rico, including chemicals associated with Agent Orange. However, those records do not show that the military sprayed Agent Orange across the entire island or used it at every Puerto Rico military installation.

In 1956 and 1957, researchers evaluated herbicides containing 2,4-D and 2,4,5-T on tropical vegetation in the Mayaguez area. Later records describe additional aerial herbicide testing and vegetation research in Puerto Rico during the 1960s. These projects focused on specific forest and vegetation test areas.

On Jan. 27, 2020, VA released a revised Department of Defense list of locations where tactical herbicides had been tested, used, or stored outside Vietnam. Puerto Rico, Hawaii and certain locations in Korea no longer appeared on that list.

The change made Puerto Rico claims harder, but it did not erase the historical records or prevent veterans from proving actual exposure through direct service connection.

Why was Puerto Rico removed from the VA Agent Orange list in 2020?

The VA said the update was necessary to improve accuracy, after a 2018 Government Accountability Office report that called on DoD and VA to improve how they documented and shared information about herbicide locations. No clear explanation was given for Puerto Rico specifically, even though DoD documents confirm herbicide use there and the GAO report had called for more locations, not fewer.

Is Puerto Rico a Presumptive Agent Orange Location?

Puerto Rico is not currently listed as a presumptive herbicide-exposure location under 38 C.F.R. § 3.307(a)(6), meaning VA will not automatically concede Agent Orange exposure because a veteran served somewhere on the island.

Even before its 2020 removal from the list of Agent Orange locations, Puerto Rico never had the same regulatory presumption as Vietnam. Veterans could rely on earlier Department of Defense records identifying limited herbicide-testing areas, but they still needed evidence connecting their service to a documented location and time period.

Agent Orange claims related to Puerto Rico are commonly denied or remanded. Hill & Ponton analyzed the decisions of the Board of Veterans’ Appeals (the highest level of review within the VA) between 2021 and 2025 and found 49 claims involving Agent Orange exposure in Puerto Rico: 23 denied, 19 remanded and only 7 granted.

Can the PACT Act Help Puerto Rico Agent Orange Claims?

The PACT Act did not add Puerto Rico as a presumptive Agent Orange location. Veterans who served there must still prove their individual exposure through military records and other credible evidence. However, it may affect a Puerto Rico claim after exposure is proven.

The PACT Act added hypertension and monoclonal gammopathy of undetermined significance (MGUS) as Agent Orange presumptive conditions. A veteran who proves qualifying herbicide exposure in Puerto Rico may then use the VA presumption for hypertension, MGUS, or another recognized Agent Orange condition.

Which Puerto Rico Locations Had Documented Herbicide Testing?

Historical records identify specific herbicide testing and evaluation areas in Puerto Rico. However, not every project involved Agent Orange. Some tested individual herbicide chemicals or other formulations.

Location and dates	What the historical record shows
Las Mesas and La Jagua near Mayaguez, February to June 1956	Researchers tested several herbicides, including 2,4-D and 2,4,5-T, on tropical woody plants. The record confirms DoD involvement but does not identify the formulation as Agent Orange.
Guánica and Joyuda, June to September 1956	Researchers tested 2,4,5-T and several other chemicals on tropical vegetation. The record confirms DoD involvement.
Mayaguez, Joyuda at Cabo Rojo, and the Guánica Insular Forest, September to December 1956	Researchers evaluated multiple defoliants, including 2,4-D and 2,4,5-T. The record confirms DoD involvement but does not describe the mixture as Agent Orange.
Las Mesas, La Jagua, Mayaguez, and Guánica Beach, 1957	Researchers continued testing several defoliants, desiccants, and plant-killing agents. The listed formulations varied by testing period.
Loquillo, now commonly spelled Luquillo, April and October 1966	The historical DoD list specifically identifies Herbicide Orange testing through aerial application. DoD involvement is listed as confirmed.
Las Marías, February to December 1967	The record describes testing of various herbicides, including Herbicide Orange. DoD involvement is listed as confirmed.
Near Río Grande, 1967	Researchers tested pellet formulations containing picloram, bromacil, pyriclor, and terbacil. Agent Orange is not listed, and DoD involvement is marked undetermined.
Las Mesas Cerros near Mayaguez, May 1968	Researchers tested picloram, bromacil, and pyriclor pellets. Agent Orange is not listed, and DoD involvement is marked undetermined.

These records do not establish exposure at every Puerto Rico military installation. A veteran must connect their specific duties, dates, and location to documented testing, spraying, storage, transportation, or another supported exposure event.

Does Vieques Toxic Contamination Count?

Service at Vieques or Camp Garcia does not establish Agent Orange exposure by itself. Vieques has a documented history of contamination from decades of Navy bombing and military training, but that is separate from proof that Agent Orange was tested, stored, or used there.

Certain VA decisions have cited Department of Defense research that found no evidence of Agent Orange testing on Vieques or general Agent Orange storage elsewhere in Puerto Rico. As a result, VA may deny a claim that relies only on Vieques contamination as proof of herbicide exposure.

This does not mean a veteran has no possible toxic exposure claim. A claim may involve munitions, heavy metals, depleted uranium, solvents, or another contaminant supported by the veteran’s service and medical records.

The evidence should identify the specific substance, duty location, exposure event, and diagnosed condition. Veterans should avoid labeling all Vieques contamination as Agent Orange when the available records do not support that connection.

How Do Puerto Rico Veterans Establish Service Connection?

Puerto Rico veterans can establish direct service connection by proving three elements:

• A current diagnosed disability
• Actual exposure to tactical herbicides during military service
• A medical nexus linking the disability to that exposure

Under 38 C.F.R. § 3.303(d), VA may grant benefits for a condition diagnosed after discharge when the evidence shows that it resulted from service. Puerto Rico’s absence from the presumptive-location list does not prevent a veteran from proving that connection.

The Federal Circuit confirmed this principle in Combee v. Brown. Although Combee involved radiation exposure, its rule also applies to herbicide claims: a veteran may prove actual direct causation even when a location or condition does not qualify for a presumption.

For Puerto Rico veterans, exposure is often the hardest element to prove. The evidence should connect specific duties and service dates to a documented testing area, spraying event, storage site, transportation activity, or other credible source of contact.

A medical opinion must then explain why the diagnosed condition is at least as likely as not related to that exposure. The opinion should address service records, exposure history, medical history, and other possible risk factors.

VA must resolve reasonable doubt in your favor when the positive and negative evidence are in approximate balance. However, the benefit-of-the-doubt rule cannot replace missing exposure evidence or turn a speculative theory into a documented event.

A separate route may apply when a service-connected disability caused or aggravated another condition. In that situation, the veteran may pursue secondary service connection under 38 C.F.R. § 3.310 without proving a new herbicide exposure for the secondary condition.

Do You Need an Attorney for a Puerto Rico Agent Orange Claim?

You do not need an attorney to file a VA disability claim. However, an appeal may become complex when VA disputes the exposure location, relies on a negative military-records search, or rejects the medical nexus.

An experienced legal team can identify gaps in VA’s research, obtain supporting records, develop lay evidence, and respond to the specific reasons for denial. The strongest appeal does not merely show that herbicides were tested somewhere in Puerto Rico. It proves why the veteran’s service placed them in contact with them.

What Conditions Qualify for Agent Orange Disability Benefits?

Once a Puerto Rico veteran proves actual exposure to a qualifying herbicide, VA may presume that certain diseases resulted from that exposure. The veteran does not need to prove the herbicide caused the condition separately.

VA currently recognizes several presumptive Agent Orange cancers and blood disorders, as well as the following Agent Orange presumptive conditions:

• Chloracne or a similar acneform disease
• Type 2 diabetes
• Hypertension
• Hypothyroidism
• Ischemic heart disease
• Parkinson’s disease
• Parkinsonism
• Early-onset peripheral neuropathy
• Porphyria cutanea tarda

Chloracne, porphyria cutanea tarda, and early-onset peripheral neuropathy generally must become at least 10% disabling within one year after the veteran’s last herbicide exposure. Most other listed conditions could appear years after service.

Having one of these diagnoses does not prove that a Puerto Rico veteran was exposed. The veteran must establish the exposure first. The disease presumption will establish the medical connection only after VA accepts that exposure.

A condition outside the presumptive list may still qualify through direct service connection if medical evidence links it to the proven herbicide exposure. Compensation depends on the condition, its severity, and the rating criteria that apply.

What Evidence Do Veterans Need to Prove Puerto Rico Agent Orange Exposure?

A strong Puerto Rico Agent Orange claim must connect specific service dates, duties, and locations to documented herbicide activity. A diagnosis alone is not enough, even when VA recognizes the condition as associated with Agent Orange.

The most persuasive claims combine official military records, historical research, credible witness statements, and a medical nexus opinion. Each piece should support the same clear account of when, where, and how the exposure occurred.

Service Personnel Records

The complete Official Military Personnel File may contain details that do not appear on your DD-214. These records may show temporary-duty assignments, training locations, travel within Puerto Rico, job duties, unit attachments, or evaluations describing where the veteran worked.

Veterans and eligible next of kin can request military personnel and medical records online through the National Archives or by submitting Standard Form 180. Ask for the complete file rather than only the separation document.

Useful records may include:

• Duty assignment histories
• Performance evaluations
• Temporary-duty and travel orders
• Flight or transportation records
• Training and field-exercise records
• Maintenance, supply, security, or spraying duties
• Service treatment records showing care near a claimed test area

Unit, Ship, and Operational Records

Unit histories may show where a veteran’s organization trained, traveled, or performed missions. Morning reports, command chronologies, deck logs, operational reports, and flight records can help establish presence near a documented test area.

These records matter when personnel files identify only the main installation. For example, a record showing assignment to Ramey Air Force Base does not reveal whether a veteran’s duties took them elsewhere in western Puerto Rico.

Military Records Research

VA may request research from a military records agency when you provide enough detail about the claimed exposure. Give VA the narrowest date range possible, along with the unit, duty location, job, and the activity that caused the contact.

A negative response does not always prove that exposure did not occur. It may mean the researcher found nothing in the specific records, dates, or locations reviewed.

Read the research response carefully. If it searched the wrong unit, used dates that were too narrow, or failed to examine another relevant record collection, identify that problem and submit more precise information.

Lay and Buddy Statements

The veteran and other service members can describe events they personally observed. These statements may help fill gaps when official records are incomplete, by describing:

• Where spraying, storage, or transportation occurred
• What duties placed the veteran near the activity
• The appearance and markings of drums or equipment
• How often the contact occurred
• Whether vegetation died after spraying
• Whether the veteran handled contaminated equipment or clothing
• What protective equipment was available

Witnesses should distinguish what they saw from what they later heard. They should not identify a substance as Agent Orange solely because someone sprayed vegetation.

Historical and Archival Evidence

Older DoD testing records, archived VA location lists, research contracts, maps, installation records, and scientific reports can help establish that herbicide activity occurred in a specific area.

These records carry more weight when they match the veteran’s service dates, duties, and location. A record showing testing near Mayaguez in 1956 does not establish exposure for a veteran who served elsewhere or years later.

Independent Medical Nexus Opinion

After developing the exposure evidence, obtain a medical opinion connecting the diagnosed condition to that exposure. The physician should review the service records, exposure history, medical records, and other possible risk factors.

The opinion should state whether the condition is at least as likely as not related to the in-service exposure. It should explain the reasoning and cite relevant medical evidence instead of offering a conclusion without analysis.

Agent Orange Registry Exam

An Agent Orange Registry health exam may document exposure history, medical history, and current health concerns. Ask a VA Environmental Health Coordinator whether you meet the eligibility requirements.

The exam is separate from the disability claims process. It does not prove exposure, establish service connection, or guarantee compensation, but the resulting medical documentation may still support the record.

Filing the Claim

Veterans generally use VA Form 21-526EZ to apply for disability compensation. The claim should identify the exact Puerto Rico location, dates, military unit, duties, claimed exposure event, and diagnosed condition.

Avoid stating only that you served in Puerto Rico and encountered Agent Orange. Give VA enough detail to research the event and explain which records support your account.

Why Do VA Claims for Puerto Rico Veterans Get Denied?

Puerto Rico Agent Orange claims often fail because the evidence does not connect the veteran’s individual service to a documented exposure event. A qualifying diagnosis is important, but it cannot replace proof of exposure. The best response depends on the exact reason listed in the VA decision.

Puerto Rico Is Not on the Current List

If VA denied the claim because Puerto Rico is not a presumptive exposure location, do not rely on Puerto Rico service alone. Submit evidence connecting the veteran’s duty location and dates to a documented testing area, and argue direct service connection under 38 C.F.R. § 3.303 and Combee.

Military Records Research Found No Exposure

Did the VA rely on a negative response from a military records researcher? Review what the researcher actually checked. A negative finding may reflect the units, dates, locations, or record collections included in the search rather than prove that exposure was impossible.

Identify any missing information and submit more precise dates, unit records, maps, duty descriptions, archival documents, or credible lay statements.

The Veteran Has a Presumptive Disease but No Proven Exposure

VA may acknowledge a diagnosis such as Type 2 diabetes, prostate cancer, hypertension, or ischemic heart disease but still deny the claim because exposure was not established. Fight back by focusing on the missing exposure element. Once VA accepts qualifying herbicide exposure, the disease presumption may establish the medical connection.

The Exposure Theory Is Too Speculative

A claim may rely on rumors, secondhand accounts, or assumptions that herbicides passed through a base, ship, or aircraft. Replace general statements with evidence showing the veteran’s specific duties, location, dates, and method of contact. Explain who observed the event, what occurred, and which records support the account.

Service Dates Do Not Match Testing Dates

When VA finds that the veteran served at or near a claimed location before or after the documented testing dates, verify the precise testing period and compare it with personnel records, temporary-duty orders, unit histories, travel records, and field-exercise documents. Do not claim an overlap unless the evidence supports it.

VA Rejected the Medical Nexus

Even when exposure evidence exists, VA may deny the claim because a medical examiner found no connection between the exposure and the diagnosed condition. Respond with an independent opinion that addresses the negative examination directly. The private physician should review the complete record, discuss other risk factors, and explain why the condition is at least as likely as not related to the documented exposure.

How Can You Appeal a Denied Puerto Rico Claim?

The correct review lane depends on the reason for denial:

• Supplemental Claim: Use this option when you have new and relevant evidence, such as personnel records, archival documents, buddy statements, corrected research, or a stronger nexus opinion.
• Higher-Level Review: Use this option when you believe VA made a legal or factual error based on the evidence already in the file. You cannot add new evidence.
• Board Appeal: Use this option when you want a Veterans Law Judge to review the case. Depending on the docket selected, you may be able to submit evidence or request a hearing.

The appeal should address VA’s stated reason for denial rather than resubmit the same unsupported theory. Learn more about choosing the right VA disability appeal path.

Are Survivors of Puerto Rico Veterans Eligible for VA Benefits?

Yes. A surviving spouse, qualifying child, or dependent parent may qualify for Dependency and Indemnity Compensation (DIC) when a service-connected condition caused or contributed to a Puerto Rico veteran’s death.

If VA had already service connected the veteran’s Agent Orange-related condition, the survivor may have a clearer path. When VA never established exposure or service connection, the survivor may need to prove the same elements the veteran would have needed:

• The veteran’s specific Puerto Rico service dates and locations
• Actual exposure to a qualifying herbicide
• A diagnosed condition linked to that exposure
• Medical evidence showing the condition caused or substantially contributed to the veteran’s death

The death certificate may support the claim, but it may not tell the whole story. A medical opinion can help when the service-connected condition appears as a contributing factor, worsened another fatal illness, or does not appear clearly on the death certificate.

Survivors may apply for DIC using VA Form 21P-534EZ. The claim should include the veteran’s exposure evidence, medical records, death certificate, and any opinion connecting the cause of death to service.

What Happens If the Veteran Had a Pending Claim or Appeal?

An eligible survivor may ask to continue a claim or appeal that was pending when the veteran died. This is called substitution. It allows the survivor to submit additional evidence and continue developing the pending matter. The survivor may also seek accrued benefits that VA owed but had not paid before the veteran’s death.

A request for substitution generally must be filed within one year of the veteran’s death. The survivor should identify the pending claim or appeal and submit evidence showing eligibility to substitute.

Free Evaluations for Denied Puerto Rico Claims

Hill & Ponton helps veterans and survivors appeal denied VA disability claims, with a 96% success rate for the cases we take on. Find out more from about those we’ve assisted.

If VA denied your claim because Puerto Rico is not on the current exposure list, relied on an incomplete military-records search, or rejected exposure or nexus evidence, request a free case evaluation today to review your appeal options.

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