Yes, using mothballs outside is illegal under federal law in the United States. The label on every mothball product sold in the US is a legally binding document, and every registered mothball label restricts use to enclosed, indoor spaces. Using them outdoors violates the Federal Insecticide, Fungicide, and Rodenticide Act, known as FIFRA.
Most people have no idea this is a federal issue. They buy mothballs at a hardware store and assume they can use them however they want. That assumption is wrong and can carry real consequences.
One surprising fact: FIFRA violations are not just civil matters. Knowing and willful misuse of a pesticide contrary to its label can result in criminal charges, including felony prosecution for repeat offenders or commercial applicators.
This guide covers exactly what the law says, how enforcement works, which specific uses are most legally risky, what state laws add on top of federal rules, and what legal alternatives exist for 2026.
Is It Illegal to Use Mothballs Outside?
Yes, using mothballs outside is illegal under federal law. Under FIFRA, 7 U.S.C. Section 136 through 136y, it is a violation to use any registered pesticide in a manner inconsistent with its labeling. Every mothball product registered with the EPA specifies use in enclosed, airtight spaces only.
The legal principle behind this is sometimes called “the label is the law.” Pesticide labels are not just warning stickers. Under FIFRA, they carry the same legal weight as a regulatory statute. Ignoring the label’s use instructions is the same, legally speaking, as ignoring a federal rule.
Mothballs contain either naphthalene or paradichlorobenzene, both of which are regulated chemical compounds. Their EPA registrations specify indoor, enclosed use because outdoor conditions cause rapid sublimation, spreading toxic vapors beyond the intended containment area and creating environmental contamination risks.
Quick Facts:
- Federal law: FIFRA, 7 U.S.C. Section 136j prohibits use inconsistent with labeling
- Both naphthalene and paradichlorobenzene mothballs carry indoor-only label restrictions
- The EPA registers and regulates mothball products under pesticide law
- Outdoor use is a label violation regardless of the quantity used
- Enforcement can come from the EPA directly or through state agriculture departments
Are Mothballs Illegal Outdoors?
Mothballs are illegal to use outdoors in the United States under the FIFRA label-as-law framework. This applies in all 50 states because FIFRA is federal law with nationwide reach.
The illegality is not based on the chemical itself being banned outright. Naphthalene and paradichlorobenzene are not prohibited substances. Mothball products are legally sold and legally used, but only within the boundaries of their registered label instructions.
Think of it like a prescription medication. The drug itself is legal. Using it in ways not listed on the prescription or label is where you cross into a legal problem. Mothballs work exactly the same way under FIFRA. Legal product. Illegal application method.
The outdoor restriction on mothball labels exists because outdoor use creates uncontrolled vapor release, potential soil and groundwater contamination through rain and runoff, and exposure risk to non-target animals, children, and neighboring properties. Those environmental consequences are exactly what EPA registration and labeling rules are designed to prevent.
Key distinction:
| Use Type | Legal? | Reason |
|---|---|---|
| Mothballs in sealed closet | Legal | Matches label instructions |
| Mothballs in sealed storage container | Legal | Matches label instructions |
| Mothballs in attic with ventilation | Gray area | Depends on label specifics |
| Mothballs in yard or garden | Illegal | Off-label use under FIFRA |
| Mothballs near foundation outdoors | Illegal | Off-label use under FIFRA |
| Mothballs under a porch or deck | Likely illegal | Typically not an enclosed space per label |
Can You Put Mothballs in Your Yard?
No, you cannot legally put mothballs in your yard. Placing mothballs in an open yard, garden, or any outdoor area is an off-label use of a federally registered pesticide and constitutes a violation of FIFRA.
This surprises many homeowners because the product is sold freely at retail stores and has no purchase restriction. The sale is legal. The open-air outdoor placement is not.
Yards are not enclosed spaces. Rain, wind, and natural ground absorption mean that mothball chemicals released outdoors do not stay where you put them. Naphthalene and paradichlorobenzene vapor disperses into the surrounding air. The solid material dissolves into the soil with rain contact. Both pathways create exposure risks that go well beyond your own property line.
For homeowners, the practical enforcement reality is that most outdoor mothball use does not result in an EPA investigation unless a complaint is filed, a neighbor reports the chemical smell, or environmental testing reveals contamination. But the legal violation exists from the moment the mothballs are placed outside, regardless of whether anyone reports it.
Bold callout: Under FIFRA Section 12 (7 U.S.C. Section 136j), it is unlawful for any person to use any registered pesticide in a manner inconsistent with its labeling. This applies to private homeowners, not just commercial applicators.
Are Mothballs in the Garden Legal?
No, mothballs in a garden are not legal. Garden beds, whether flower gardens or vegetable gardens, are outdoor open spaces. Placing mothballs in any garden area violates the indoor-only label restrictions on every EPA-registered mothball product.
Garden use is one of the most commonly reported outdoor mothball violations because people use them to repel animals like rabbits, deer, squirrels, and moles from their plants. The intent to protect a garden does not create a legal exception. FIFRA does not have a “good intentions” carve-out for pesticide misuse.
The garden context also raises an additional concern beyond just the FIFRA violation. Mothball chemicals are absorbed by soil and can be taken up by plant roots. Naphthalene has been shown in agricultural research to affect plant growth and can remain in soil for extended periods. For vegetable gardens, this creates a food safety dimension on top of the legal one.
Mothball garden use risks:
- FIFRA violation from off-label outdoor use
- Soil contamination from naphthalene or paradichlorobenzene
- Chemical uptake by vegetables through root absorption
- Exposure risk to beneficial insects, birds, and soil organisms
- Neighbor complaints if fumes migrate across property lines
- Groundwater contamination risk through rain and soil percolation
Key Takeaway: Using mothballs outdoors, in yards, gardens, or any open area, is a federal FIFRA violation in all 50 states. The product label carries the force of law, and outdoor use contradicts that label in every registered mothball product sold in the US.
What Does the EPA Say About Using Mothballs Outside?
The EPA’s position on outdoor mothball use is clear: it is illegal. The EPA has publicly stated that using mothballs in any manner inconsistent with the label is a violation of federal pesticide law. Outdoor use is inconsistent with every registered mothball label.
The EPA regulates mothballs under the Federal Insecticide, Fungicide, and Rodenticide Act. The agency reviews and approves the label for each registered mothball product. That label specifies the legal uses. When the EPA approves a label that restricts use to enclosed spaces, that restriction becomes law.
The EPA has issued guidance through its National Pesticide Information Center specifically addressing mothballs. That guidance notes that mothballs are sometimes used illegally to repel wildlife and insects outdoors, and it explicitly identifies those uses as misuse under federal law.
The EPA also notes that outdoor mothball use raises environmental justice concerns in some contexts, particularly in urban areas where outdoor chemical placement can affect children, pets, and neighboring households who have no knowledge that a pesticide is being used nearby.
EPA Key Points on Mothball Use:
| EPA Position | Details |
|---|---|
| Legal use | Enclosed indoor spaces only, per registered label |
| Illegal use | Any outdoor, open-air application |
| Regulatory basis | FIFRA, 7 U.S.C. Section 136j |
| Enforcement authority | EPA Office of Enforcement, plus state agencies |
| Environmental concern | Soil, water, and air contamination from outdoor use |
What Is a FIFRA Mothball Violation?
A FIFRA mothball violation occurs when someone uses a mothball product in a way that is inconsistent with its registered label, most commonly by placing mothballs in outdoor or open-air spaces where the label restricts use to enclosed indoor areas.
FIFRA, codified at 7 U.S.C. Sections 136 through 136y, is the primary federal law governing pesticide use in the United States. Section 136j makes it unlawful for any person, including private homeowners, to use any registered pesticide in a manner inconsistent with its labeling. This is the core provision that makes outdoor mothball use a federal violation.
FIFRA violations fall into categories based on intent and whether the violator is a commercial applicator or a private individual. For private homeowners using a “general use” pesticide like mothballs off-label, the violation is still real but is typically treated differently than commercial violations in terms of penalty severity.
A FIFRA violation does not require that harm actually occurred. The violation is the act of misuse itself. Placing the mothball outdoors is the violation, regardless of whether anyone was harmed, whether any complaint was filed, or whether any EPA inspector witnessed the act.
FIFRA Violation Categories:
- Private individual using general use pesticide off-label: FIFRA Section 136j violation; civil penalty possible
- Commercial applicator using off-label: Higher civil penalties, potential license action
- Knowing and willful misuse: Criminal misdemeanor; up to one year in prison and fines
- Repeated or pattern violations: Criminal felony prosecution possible
- Fraudulent label claims or distribution: Separate FIFRA criminal provisions apply
What Are the Mothball Pesticide Misuse Penalties?
Penalties for mothball pesticide misuse under FIFRA range from civil fines to criminal prosecution depending on the nature of the violation, the identity of the violator, and whether the violation was knowing and willful.
For private individuals using a general use pesticide like mothballs in an off-label manner, FIFRA Section 136l sets civil penalties. For private individuals (as opposed to commercial registrants or applicators), the EPA has some discretion in penalty amounts, and penalties for homeowner violations are typically lower than commercial penalties. However, they are still real and can be imposed.
For commercial pesticide applicators, civil penalties under FIFRA can reach up to $19,162 per violation as of current EPA penalty schedules, which are adjusted periodically for inflation under the Federal Civil Penalties Inflation Adjustment Act.
For criminal violations under FIFRA Section 136l(b), knowing violations by any person carry a misdemeanor charge with fines up to $25,000 and up to one year in prison. A second conviction escalates to felony-level treatment in terms of fines and imprisonment under FIFRA’s penalty structure.
| Violator Type | Penalty Type | Maximum Amount |
|---|---|---|
| Private homeowner, first offense | Civil penalty | Lower range; EPA discretion |
| Commercial applicator, civil | Civil penalty per violation | Up to $19,162 per violation |
| Any person, knowing violation | Criminal misdemeanor | Up to $25,000 fine, up to 1 year prison |
| Repeat knowing violator | Criminal, enhanced | Increased fines, potential felony |
| State-level additional penalties | Varies by state | Up to additional thousands in fines |
Key Takeaway: FIFRA penalties for outdoor mothball misuse are real and apply to private homeowners, not just commercial applicators. Criminal charges are possible when misuse is knowing and willful.
Is It Illegal to Use Mothballs to Repel Snakes?
Yes, using mothballs to repel snakes is illegal. Snake repellent is not a registered use on any EPA-approved mothball label. Placing mothballs outdoors to deter snakes is an off-label use that violates FIFRA.
This is one of the most persistent mothball myths in the United States. People scatter mothballs around their property specifically to keep snakes away, believing it is a common and accepted practice. It is neither legal nor particularly effective. Research does not support mothballs as an effective snake deterrent, and the legal prohibition is firm.
The snake repellent use case is treated the same way as any other outdoor mothball placement under FIFRA. The intent to repel a specific animal does not create a separate legal category. The violation is the outdoor, open-air placement itself, regardless of the target pest.
Some states have added additional layers of protection for certain snake species under state wildlife laws. Using chemicals to harass or harm protected snake species could add state wildlife violation charges on top of the FIFRA violation in those jurisdictions.
Snake repellent mothball use facts:
- Not a registered use on any EPA mothball label
- Constitutes an off-label FIFRA violation
- Not scientifically supported as an effective snake deterrent
- May trigger state wildlife protection laws if protected species are present
- Legal alternatives exist and do not carry FIFRA violation risk
Can You Use Mothballs to Keep Cats Away Legally?
No, using mothballs to keep cats away is not legal. Using mothballs as a cat deterrent outdoors is an off-label application of a registered pesticide and constitutes a FIFRA violation.
This use case is particularly common in neighborhoods where feral cats or neighboring cats enter yards and gardens. Mothballs are placed around garden beds or along fence lines specifically to repel the cats. Despite being widely practiced, it is not a legal use of the product.
Beyond the federal law issue, using mothballs to deter cats raises potential animal cruelty concerns in some states. Naphthalene is toxic to cats. Cats that directly ingest mothballs or are exposed to concentrated fumes can suffer serious and potentially fatal poisoning. In states with strong animal cruelty statutes, knowingly placing a toxic substance in an area frequented by animals could constitute animal endangerment.
California, for example, has strong animal cruelty laws under California Penal Code Section 597. Illinois has the Humane Care for Animals Act, 510 ILCS 70. Using mothballs in ways that predictably expose and harm animals could trigger these state statutes independent of the FIFRA violation.
Bold callout: Naphthalene toxicity in cats can cause hemolytic anemia, a condition where red blood cells are destroyed. Even brief exposure to concentrated naphthalene fumes can trigger symptoms. This is why outdoor mothball use near areas cats access carries both legal and animal welfare consequences.
Is Using Mothballs to Repel Animals Illegal?
Yes, using mothballs to repel any animal outdoors is illegal under FIFRA. The list of animals people attempt to repel with mothballs includes deer, squirrels, rabbits, raccoons, moles, groundhogs, and birds. None of these are registered uses on any mothball label.
Animal repellent use is one of the clearest examples of off-label pesticide application. The registered use of mothballs is protection of stored clothing and fabrics from moth larvae in enclosed indoor spaces. Repelling vertebrate wildlife in open outdoor areas is categorically outside the registered label.
Federal wildlife protection laws can add complexity to this violation. Using chemicals to harass migratory birds, for example, can trigger the Migratory Bird Treaty Act (16 U.S.C. Section 703), a separate federal statute with its own penalties. Placing mothballs near bird nesting areas could implicate that law alongside FIFRA.
For protected species, the legal exposure escalates further. The Endangered Species Act (16 U.S.C. Section 1531 through 1544) prohibits harming or harassing listed species. Using a toxic chemical in areas where listed species are present and exposed can constitute a take under the ESA, which carries its own civil and criminal penalties.
| Target Animal | Additional Law Risk | Federal Statute |
|---|---|---|
| Migratory birds | Migratory Bird Treaty Act | 16 U.S.C. 703 |
| Federally listed species | Endangered Species Act | 16 U.S.C. 1531 |
| Any wildlife | FIFRA off-label use | 7 U.S.C. 136j |
| Domestic cats or dogs | State animal cruelty laws | Varies by state |
Are Mothballs Near a Vegetable Garden Illegal?
Yes, using mothballs near a vegetable garden is illegal under FIFRA, and it creates additional food safety concerns that other outdoor uses do not. Vegetable gardens are outdoor spaces, and placing mothballs near them violates the indoor-only label restriction on all registered mothball products.
The vegetable garden context is legally and practically more serious than other outdoor placements. Mothball chemicals, specifically naphthalene and paradichlorobenzene, can be absorbed through soil and taken up by plant roots. Research in agricultural science has documented naphthalene uptake in vegetable crops.
If contaminated vegetables are consumed, a food safety issue arises that goes beyond the FIFRA violation itself. The FDA regulates pesticide residues in food under the Federal Food, Drug, and Cosmetic Act. Contaminated produce, even from a home garden, could theoretically trigger FDA food safety concerns if it enters any commercial stream.
For a private homeowner growing vegetables purely for home consumption, the FDA commercial food concern is less applicable, but the FIFRA violation and the personal health risk from consuming naphthalene-contaminated produce remain real concerns.
Bold callout: The EPA has specifically called out vegetable garden mothball use as a known misuse pattern. The agency notes that naphthalene uptake by edible plants has been documented, making this one of the higher-risk outdoor mothball applications from both a legal and health standpoint.
Key Takeaway: Mothballs near vegetable gardens combine a FIFRA federal violation with soil contamination risk and potential food safety concerns, making this one of the most legally and practically problematic outdoor mothball uses.
Can a Neighbor Complain About Mothball Fumes Outside?
Yes, a neighbor can legally complain about mothball fumes coming from your outdoor property, and those complaints can trigger enforcement action. Outdoor mothball use creates airborne naphthalene or paradichlorobenzene vapor that crosses property lines. That creates both a regulatory and a civil law exposure.
From a regulatory standpoint, a neighbor complaint to the EPA or state agriculture department creates a record that can prompt an investigation. For most residential complaints, local or state pesticide enforcement agencies are the first responders, not the federal EPA directly. State departments of agriculture often handle FIFRA complaint investigations at the local level.
From a civil law standpoint, airborne chemical fumes that cross property lines can constitute a private nuisance under common law. Private nuisance is a civil tort claim where one property owner’s use of their property unreasonably interferes with another’s use and enjoyment of their own property. A neighbor who can document that mothball fumes are causing health symptoms, damaging their property, or interfering with their outdoor activities has a viable private nuisance claim.
In states with strong environmental or air quality regulations, neighbor complaints can also trigger local code enforcement or air quality district investigation, layering additional state or local legal exposure on top of the federal FIFRA violation.
Neighbor Complaint Pathways:
- Report to EPA regional office
- Report to state department of agriculture pesticide program
- Report to local code enforcement
- File a civil private nuisance lawsuit
- Report to local health department if health effects are documented
Can a Landlord Use Mothballs Outside?
No, a landlord cannot legally use mothballs outside. The FIFRA label-as-law rule applies to all persons, including landlords and property management companies. Using mothballs in outdoor common areas, around building foundations, or in landscaping is the same federal violation regardless of whether the person placing them is a homeowner or a commercial property manager.
For commercial landlords and property management companies, the legal exposure is actually higher than for private homeowners. Commercial entities face higher civil penalty ceilings under FIFRA. A property management company that routinely places mothballs in common outdoor areas faces per-violation civil penalties that can accumulate significantly across multiple properties or incidents.
Tenants who are exposed to outdoor mothball use by their landlord have the right to report that use to the appropriate state agency. In states with strong tenant protection laws, landlord pesticide misuse in common areas could also support a habitability complaint or a breach of the implied warranty of habitability if the chemical exposure creates a health hazard.
California’s Pesticide Contamination Prevention Act and its tenant-focused environmental laws are one example where tenant reporting mechanisms are well-established. New York’s Department of Environmental Conservation similarly accepts pesticide misuse complaints from residents, including tenants.
Quick Facts for Tenants:
- Landlord outdoor mothball use is a FIFRA violation
- Tenants can report to state agriculture or environmental agencies
- Exposure documentation supports habitability complaints
- State tenant protection laws may provide additional remedies
- Landlords face higher civil penalty exposure than private homeowners
What Are the State Laws on Outdoor Mothball Use?
State laws on outdoor mothball use layer on top of federal FIFRA requirements. Every state has its own pesticide regulation statute that mirrors or expands on FIFRA, enforced by state departments of agriculture or equivalent agencies.
While FIFRA creates the federal baseline, states can and do create stricter pesticide misuse standards. California is the most notable example. California’s Department of Pesticide Regulation (CDPR) operates under the California Food and Agricultural Code and enforces pesticide laws that are among the strictest in the country. California has additional reporting, certification, and enforcement requirements that go beyond federal FIFRA.
New York enforces pesticide law through the Department of Environmental Conservation under Environmental Conservation Law Article 33. New York has specific provisions addressing pesticide use in sensitive environments, and outdoor residential pesticide misuse complaints are actively investigated.
Florida enforces pesticide law under Chapter 487 of the Florida Statutes through the Department of Agriculture and Consumer Services. Pesticide misuse in Florida carries state civil penalties in addition to any federal FIFRA exposure.
| State | Enforcement Agency | State Law | Additional Strictness |
|---|---|---|---|
| California | Dept. of Pesticide Regulation | CA Food and Agricultural Code | Among strictest in US |
| New York | Dept. of Environmental Conservation | Environmental Conservation Law Art. 33 | Active residential enforcement |
| Florida | Dept. of Agriculture and Consumer Services | Chapter 487 Florida Statutes | Civil penalties plus FIFRA |
| Texas | Dept. of Agriculture | Texas Agriculture Code Chapter 76 | Tracks FIFRA standards |
| Illinois | Dept. of Agriculture | Illinois Pesticide Act | FIFRA-parallel enforcement |
What Are the Penalties for Illegal Pesticide Use by a Homeowner?
Penalties for illegal pesticide use by a homeowner under FIFRA depend on whether the violation is treated as civil or criminal and whether the violator has prior pesticide violations on record.
For a first-time homeowner violation involving general use pesticide misuse, the EPA typically has discretion to issue a warning, a notice of violation, or a civil penalty. The agency’s pesticide enforcement policies recognize the difference between a commercial applicator and a private homeowner, and penalties at the homeowner level, while real, tend to start lower before escalating.
State-level penalties add to the picture. State departments of agriculture can issue their own civil penalties under state pesticide statutes, separate from and in addition to any federal FIFRA penalty. A homeowner in California found misusing a pesticide outdoors faces both CDPR civil enforcement and potential federal FIFRA action.
Criminal penalties become relevant when misuse is knowing and willful. A homeowner who has been warned or cited for outdoor mothball use and continues the practice is moving toward knowing and willful territory. Under FIFRA Section 136l(b)(1), that knowing violation carries fines up to $25,000 and up to one year in prison. A second conviction escalates the penalty structure further.
Homeowner Penalty Progression:
- First contact, no prior record: Warning or notice of violation
- First formal action: Civil penalty, EPA discretion, typically lower range
- Repeat violation: Higher civil penalty, state action possible
- Knowing and willful violation: Criminal misdemeanor, up to $25,000 and one year in prison
- Second criminal conviction: Escalated criminal penalties under FIFRA
What Are Legal Mothball Alternatives for Outdoor Use?
Legal outdoor pest and animal repellents exist and do not carry FIFRA violation risk when used according to their own label instructions. The key is choosing products that are registered and labeled specifically for outdoor use.
Several EPA-registered repellent products are formulated and labeled for outdoor use against specific wildlife and insects. These include products containing capsaicin (the active compound in hot peppers), putrescent egg solids for deer and rabbit repellent, and essential oil-based repellents labeled for outdoor garden use. All of these are legal when used per their label directions.
For insect control in outdoor gardens, numerous EPA-registered insecticides carry label instructions specifically approving outdoor application. Pyrethrin-based products, neem oil formulations, and other naturally derived compounds are commonly registered for outdoor pest control in vegetable and ornamental gardens.
For fabric protection, the registered indoor use for which mothballs are approved, alternatives include cedar chips and cedar blocks, which do not carry pesticide registration requirements and are not subject to FIFRA label restrictions. Cedar is a natural moth deterrent that is fully legal to use in any location.
Legal Outdoor Repellent Options:
| Product Type | Active Ingredient | Registered Use | Legal Outdoor? |
|---|---|---|---|
| Deer repellent spray | Putrescent egg solids | Outdoor garden | Yes, per label |
| Animal repellent granules | Capsaicin | Outdoor perimeter | Yes, per label |
| Garden insect spray | Pyrethrin | Outdoor garden | Yes, per label |
| Neem oil spray | Azadirachtin | Outdoor plants | Yes, per label |
| Cedar repellent | Natural cedar oil | Fabric and closets | No FIFRA restriction |
| Mothballs | Naphthalene or paradichlorobenzene | Indoor enclosed only | No outdoor use |
Key Takeaway: Legal outdoor repellent options are widely available. The solution to the outdoor pest problem is not to misuse mothballs but to select a product that is actually registered and labeled for the outdoor use you need.
Frequently Asked Questions
What happens if you get caught using mothballs outside?
Getting caught using mothballs outside typically begins with a warning or notice of violation from the EPA or a state pesticide enforcement agency.
Repeat violations or situations involving documented harm escalate to civil penalties, which for private homeowners are set at the EPA’s discretion but can reach thousands of dollars.
Knowing and willful violations under FIFRA Section 136l carry criminal penalties of up to $25,000 in fines and up to one year in prison.
State penalties are separate from federal penalties and can be imposed simultaneously.
Are mothballs registered by the EPA for outdoor use?
No, mothballs are not registered by the EPA for any outdoor use.
Every EPA-registered mothball product specifies use in enclosed, airtight indoor spaces only, such as sealed closets and storage containers.
The EPA registration is what legally defines how a pesticide product may be used, and outdoor use is not within that registration for any mothball product currently on the market.
Using a pesticide in any way not consistent with its EPA registration is a federal FIFRA violation.
Can mothballs contaminate soil or groundwater?
Yes, mothballs can contaminate soil and groundwater when used outdoors.
Naphthalene and paradichlorobenzene dissolve into soil when exposed to rain and irrigation, and both compounds can leach into groundwater.
Naphthalene is classified as a possible human carcinogen by the EPA and the International Agency for Research on Cancer.
Soil contamination from outdoor mothball use can persist for months to years depending on soil type, rainfall, and temperature conditions.
Do mothball labels specifically say outdoor use is prohibited?
Yes, mothball labels specifically restrict use to enclosed indoor spaces, which by definition prohibits outdoor use.
The labels state that mothballs must be used in airtight containers or sealed spaces only, and that the product must not be placed in open areas.
Under FIFRA, the label instruction is legally binding, so any use outside of those stated conditions is a federal violation regardless of whether the label uses the word “prohibited” explicitly.
The EPA considers any use not consistent with the label to be misuse, including outdoor placement.
Are there any states where outdoor mothball use is specifically banned by name?
No state has a statute that names mothballs specifically as a banned outdoor substance by that product name.
The prohibition comes from FIFRA’s label-as-law framework, which applies in all 50 states, and from state pesticide statutes that parallel FIFRA and apply to all registered pesticides including mothballs.
California’s Department of Pesticide Regulation has issued specific guidance on mothball misuse, making it one of the states with the most explicit public-facing enforcement policy on this issue.
In practical terms, the federal FIFRA prohibition is sufficient to make outdoor mothball use illegal in every state without any state needing to pass a separate mothball-specific ban.
Closing
Outdoor mothball use is a real federal violation with a real penalty structure. The product label is the law under FIFRA, and not one registered mothball label authorizes outdoor use. Legal alternatives exist and work without the legal risk.
Bookmark this page and share it with anyone who thinks scattering mothballs in their yard is a harmless pest control trick. Knowing what the law actually says keeps you, your neighbors, and your property on the right side of federal and state pesticide regulations in 2026 and beyond.
