Find common pests, seasonal timing, local costs, and licensed professionals for all 50 US states.
Pest pressure is one of the most regional things about home ownership in America. A Texas homeowner deals with fire ants, scorpions, and brown recluse spiders that an Oregon homeowner will likely never see. A Minnesota homeowner deals with deer ticks and overwintering mice on a scale that would shock someone in Florida — where the year-round threats are roof rats, termites, and palmetto bugs instead.
These differences are driven by climate (freeze cycles kill some pests and not others), native vegetation (which determines the food supply and habitat), housing stock (older homes have different vulnerabilities than newer construction), and what has invaded the state historically (the spotted lanternfly is a major Pennsylvania issue and a non-issue in Nevada). Treatment strategies that work brilliantly in one state can be ineffective or unnecessary in another.
Our state-by-state guides cover the top 10 to 15 pests in each state, when their season peaks locally, which products work in the local climate, and which state-specific regulations affect what you can buy and apply yourself. Pick your state to start — or browse a few neighboring states if you are near a border, since pest ranges rarely respect state lines.
State and regional differences in pest pressure are substantial and often surprise homeowners who move between regions. Termite pressure ranges from minimal in northern tier states to severe in the Gulf Coast and parts of the Southwest. Mosquito species composition shifts geographically — Aedes albopictus has expanded north in recent decades, bringing daytime biting pressure to areas that previously dealt mostly with dawn-dusk Culex species. Fire ant pressure dominates the southern tier and has moved north over decades. Tick species and tick-borne disease pressure varies by region; Lyme disease incidence is concentrated in the Northeast and upper Midwest. Regional cockroach pressure varies — German cockroaches anywhere, but American and Asian cockroaches concentrate in warm humid regions. Treatment approaches that work in one region may need adjustment in another, which is why local extension publications are usually more useful than national averages.
The pesticide label is the most important document in any pest control decision, and it's the document most people skim. Under FIFRA (the federal law that governs pesticide registration), the label is legally binding — using a product inconsistent with its label is a violation, regardless of intent. The label has several sections that homeowners should read fully before purchase, not after: the use sites (where it can legally be applied), the target pests (some products legal indoors are not for the specific pest), the mixing rate (overdosing wastes product without improving efficacy and increases drift risk; underdosing accelerates resistance), the PPE requirements (some require respirators, not just gloves), and the re-entry interval (how long until the treated area is safe for people and pets). The signal word — Caution, Warning, Danger — indicates acute toxicity but not chronic risk; that's elsewhere on the label. Reading labels well prevents nearly every common DIY misapplication.
Each state regulates pest control operators through a department of agriculture, environmental quality, or similar agency. Licensing requirements typically include training hours, exams in relevant categories (general household pest control, termite, fumigation, lawn and ornamental), and continuing education. The state agency maintains a public database of licensed operators and accepts consumer complaints. Before hiring pest control, verifying license status via the state database is appropriate due diligence; complaints filed with the agency become part of the operator's record. State agencies also publish pesticide use enforcement actions — operators with significant violations are public record. Choosing a properly licensed operator avoids the most common quality and safety issues that arise with informal or unlicensed pest control.
Cooperative Extension Services — the public outreach arm of land-grant universities — are an underused resource for homeowners. Each state's extension service publishes pest fact sheets specific to local conditions, offers free or low-cost pest identification (often by photo submission online), runs Master Gardener volunteer programs that handle public inquiries, and provides region-specific treatment recommendations developed for local pest pressure and conditions. Extension publications are peer-reviewed by university entomologists and are generally more reliable than commercial sources for region-specific guidance. The website to find your state's extension service is usually at the state land-grant university (often a state university with 'State' in the name). Most extension content is free to access and represents tax-funded resources homeowners already pay for indirectly.
Pesticide efficacy is highly sensitive to the conditions at application and immediately after. Temperature affects both vapor pressure (volatility) and residual binding — products applied above ~90°F often volatilize before binding to surfaces, while applications below ~50°F can fail to spread properly. Surface porosity changes residual duration: a residual that lasts eight weeks on a sealed concrete slab might last three weeks on bare wood. Rainfall within four hours of an outdoor application typically washes off most surface deposits, though microencapsulated products are more rain-fast. UV exposure degrades many pyrethroids within days to weeks on sunny surfaces, which is why fence-line applications often fail mid-summer. Indoor humidity affects bait acceptance — dry baits perform worse in high humidity as they absorb moisture and lose palatability. Reading conditions correctly explains many otherwise mysterious treatment failures.
State-level pest pressure summaries are useful but mask substantial within-state variation that affects local treatment decisions. Climate variation within a single state can produce dramatically different pest profiles: mountainous regions and lowland regions of the same state typically have different termite risk, different mosquito pressure, different tick species and densities, and different rodent activity patterns. Coastal regions face species (carpenter bees in older wooden structures, salt-marsh mosquitoes) that inland regions of the same state don't see. Urban heat island effects shift pest activity periods earlier in spring and later in fall within cities compared to surrounding rural areas. The implication for homeowners: state-level resources are starting points, but understanding your specific climate zone within the state produces better local accuracy. County extension offices typically publish pest activity calendars specific to the county or region, which provide useful refinement over state-wide summaries. For specific high-stakes decisions — termite protection investment in a new build, mosquito reduction program timing, tick exposure expectations for outdoor activities — the local refinement matters meaningfully.
Most homeowners frame pest control as elimination — zero individuals seen — but professional programs operate on threshold concepts that better match what's actually achievable and economically reasonable. A treatment threshold is the population level at which intervention is justified; below it, the cost and disruption of treatment outweigh the damage prevented. For aesthetic pests like the occasional ant or spider, the threshold is essentially zero only because tolerance is low, not because zero is biologically realistic. For pests with health implications (cockroaches, rodents) or property damage potential (termites, carpenter ants), thresholds are set well below visible damage to allow time for response. The implication for self-evaluation: a program that drops a cockroach population by 95% without reaching zero may be functioning correctly, and pushing for the last 5% may require disproportionate effort or treatment intensity that creates other problems. Reframing 'success' as durable reduction below threshold rather than absolute zero produces saner program design, more reasonable expectations of paid services, and less wasted DIY effort chasing the long tail of a population that's already controlled in any practical sense.
Most homeowners treat pest issues episodically and lose information between events. Building a simple ongoing pest file — even a single document in a notes app or folder of photos — produces compounding benefits across years of property ownership. The contents that matter: date and location of every notable sighting, identification (with photos where possible), treatment applied and product names used, professional service records and warranty terms, structural sealing work performed and where, drainage and moisture correction work performed, and observations across seasons. Over two or three years, patterns emerge that aren't visible in single incidents: which months reliably bring ant activity, which exterior corner gets wasps every spring, which entry points keep failing, which products actually worked versus which were tried and abandoned. This file becomes useful at property sale (documenting professional treatment and remediation), at insurance claim time (documenting pre-existing conditions or treatment history), and at any future pest problem (where past records narrow the diagnostic space immediately). The effort to maintain is minimal — a few minutes per incident — and the cumulative information value substantial.
Pesticide regulation is federal in its baseline structure but state laws and rules layer significant additional requirements that vary widely across jurisdictions. Some states require certifications for pesticide applications that are unregulated elsewhere; some have notification requirements before treatment that don't exist federally; some have restrictions on specific active ingredients that remain registered at the federal level. For homeowners, the practical impact is in two places: what they can legally apply themselves on their own property, and what their pest control company is required to do regarding notice and documentation. California, New York, and a handful of other states have particularly elaborate regulatory frameworks that exceed federal requirements in several dimensions. Homeowners moving between states are often surprised by the differences, and pest control companies operating across state lines have to maintain state-specific compliance programs that aren't immediately visible to customers. For questions about what's required in your specific jurisdiction, state pesticide agencies — usually under departments of agriculture or environmental conservation — are the authoritative source, and most maintain consumer information pages.
Pet-safe is a marketing phrase that does specific work, and the work it does is narrower than most pet owners assume. A product labeled pet-safe is generally one that, when used according to label directions and after the specified re-entry interval, presents a low risk of acute toxicity to pets at expected exposure levels. That is not the same thing as zero risk, and it doesn't say anything about chronic exposure, behavioral effects, or exposure to pets with unusual physiology, age, or pre-existing conditions. The other thing it doesn't account for is real-world misuse: pets that lick treated surfaces immediately after application, products applied in higher concentrations than directed, or applications in locations the label didn't anticipate. The practical interpretation is that pet-safe products are a reasonable choice when used carefully, but the safer overall practice with any pet in the home is to keep animals out of treatment areas until products are fully dry or absorbed, choose lower-toxicity formulations like bait stations over surface sprays when feasible, and ask explicitly about ingredients and re-entry intervals rather than relying on the label phrase alone.
Pest control warranties are not standardized, and the differences between contracts that look superficially similar can be enormous. Termite warranties in particular vary across at least three significant dimensions: whether they cover retreatment only or also include damage repair, whether the damage coverage is capped or unlimited, and whether the warranty is transferable to subsequent owners. A retreatment-only warranty on a property with significant termite pressure is much weaker than a damage-inclusive warranty, and the difference matters most precisely in the situations where the warranty is most likely to be needed. General pest control service agreements often have similar gradations — some include unlimited callbacks during the service period, some include a fixed number, and some charge for any visit outside the regular schedule. Before signing, the question to ask is not whether the contract has a warranty, but exactly what the warranty covers, what triggers a callback at no charge, and what the renewal terms are. Companies rarely volunteer this clearly; reading the document carefully and asking specific questions is on the homeowner.