Local Guide · Pest control · Katy, TX
What should Katy homeowners know before hiring pest control?
Katy spans three counties, so who runs mosquito control depends on your address. Here is what to know about termites, fire ants, storms and licenses.
The City of Katy sits in Harris, Fort Bend and Waller counties, so the agency that handles mosquito control depends on which county your home is in. Pest control companies are licensed by the Texas Department of Agriculture, not the city or county. Ask for termite control licensing, written termite disclosures and a plan for fire ants and storm damage.
Key facts for Katy, TX
- The City of Katy lies in three counties: Harris, Waller and Fort Bend.
- The greater Katy area takes in parts of Fort Bend, Harris and Waller counties, including some unincorporated areas, so a Katy mailing address does not always mean city limits.
- Harris County Public Health's Mosquito and Vector Control Division treats between 8:30 p.m. and 5 a.m., weather permitting.
- Fort Bend County declared a local public health emergency on June 16, 2026, over extraordinary mosquito populations after weeks of heavy rain, and scheduled aerial spraying for June 22 to 24.
- During Hurricane Beryl in 2024, NWS reported widespread tree damage in Waller County, with a peak gust of 64 mph at Houston Executive Airport.
- During Hurricane Harvey in 2017, NWS reported major flooding across Fort Bend County and record flooding on the Brazos River at Richmond.
- Texas A&M AgriLife says Formosan termites are found in all major Texas metropolitan areas and were first found in Texas in Harris County in 1956.
Featured provider · Sponsored
Meridian Home Service Pros
Meridian Home Service Pros is a Texas home-services company with a business office in Corpus Christi whose licensed pest control technicians treat homes across West Houston, Fort Bend County and Greater Corpus Christi for roaches, ants, fire ants, mosquitoes, rodents, termites, spiders and wasps, starting with an inspection and a clear quote before any work.
Serves: Houston, Corpus Christi, Sugar Land, Katy, Cypress, The Woodlands, Missouri City, Richmond, Rosenberg, Stafford, Fulshear, Bellaire, West University Place, Meadows Place
Meridian Home Service Pros pays to be featured on this Katy, TX guide. The guide itself is written by our editorial team from the public sources listed below.
Which county agency handles mosquitoes in Katy?
It depends on where you live. The Texas Municipal League lists the City of Katy in Harris, Waller and Fort Bend counties. The Katy Area Economic Development Council says the wider Katy area also includes parts of Fulshear and some unincorporated areas.
- Harris County side: Harris County Public Health's Mosquito and Vector Control Division runs surveillance and treatment, with treatments between 8:30 p.m. and 5 a.m. Its phone is (713) 440-4800. KPRC reported in June 2026 that the county's inspection request form is for breeding sites, not for spraying.
- Fort Bend County side: Fort Bend County Health and Human Services handles mosquito work through its Environmental Health Division. In June 2026, the county declared a public health emergency over mosquito populations and scheduled aerial spraying.
- City limits: Ask the City of Katy whether city crews also spray in your neighborhood.
Private mosquito service can add to these programs. It does not replace them. Removing standing water around the home matters on every side of the county lines.
How do storms and flooding affect pest problems in Katy?
Katy has seen major storms on both sides of its county lines. During Hurricane Harvey in 2017, NWS reported major flooding across Fort Bend County and record levels on the Brazos and San Bernard rivers. During Hurricane Beryl in 2024, NWS reported downed trees, power outages and damage to homes in Fort Bend County, and widespread tree damage in Waller County.
Storm damage can create pest problems later. EPA advises keeping soil around foundations dry, fixing leaks and keeping wood away from the house to prevent termites. Texas A&M AgriLife says a roof rat can enter through a gap as narrow as half an inch. After a storm, ask an inspector to check roof damage, wet framing and debris piled near the foundation.
What termite risks should Katy homeowners plan for?
Texas A&M AgriLife Extension says Formosan termites are in at least 30 Texas counties and all major metropolitan areas, and they were first found in Texas in Harris County. They form very large colonies and can attack living trees.
AgriLife says recycled railroad ties and shoring timbers used for terraces and planting beds are thought to be the main way Formosan termites spread in Texas. If you are adding landscape timbers, ask where they came from. AgriLife says creosote alone does not guarantee protection.
For any termite job, TDA says the company must give you disclosure documents with its bid and before treatment, including a diagram, the termiticide label and the warranty terms.
What about fire ants in Katy yards?
Red imported fire ants infest the eastern two-thirds of Texas. Texas A&M AgriLife recommends its Two-Step Method for home lawns: broadcast a bait across the yard, then treat problem mounds directly. AgriLife says spring and fall are good times for bait, and rain in spring exposes new mounds.
If a lawn service handles fire ants, ask whether the company holds the Texas lawn and ornamental license category, which covers pests of lawns and ornamental plants.
How to choose a provider in Katy, TX
- Confirm whether your home is in Harris, Fort Bend or Waller County before calling about mosquito control.
- Verify the company's license on TDA's Current Licenses lists, and check for a termite control certified applicator if you need termite work.
- For lawn and fire ant work, ask whether the company is licensed in the lawn and ornamental category.
- After storms, ask for an inspection of roof damage, wet wood and debris near the foundation.
- Ask where any landscape timbers came from before installing them.
- Get termite disclosure documents, the label and the warranty in writing before treatment.
- Ask how the company seals rodent entry points, not only how it traps.
More pest control guides for Katy
- Rodent control in Houston, Katy and Sugar Land: what works and what to expectEffective rodent control in West Houston and Fort Bend County comes down to an inspection that finds how rats or mice get in, trapping matched to the species, sealing every gap, and follow-up until signs stop. Roof rats in tree canopy and Norway rats along bayous and drainage ditches are the two local patterns to know.
- Meridian Home Service Pros Brings Local, Licensed Pest Control to Houston and Corpus ChristiHomeowners from Corpus Christi to The Woodlands get a careful inspection, a clear price before the work begins and honest advice with no pressure.
- What are the signs of rats or mice in your house?The surest signs are fresh droppings, gnaw marks, greasy rub marks along walls, shredded nesting material and scratching in walls or the attic at night. Here is how to check each room of a Houston or Corpus Christi home and how to tell an old problem from an active one.
- Roof rat, Norway rat or mouse? How to tell which rodent is in your Texas homeRoof rats are sleek climbers with tails longer than their bodies that live up high in attics and trees. Norway rats are heavier burrowers that live low, along foundations and drains. House mice are small, curious and fit through a hole the size of a dime. Here is how to tell them apart and why it changes the plan.
- Rats in the attic: what the noises mean and what to do firstScurrying or gnawing overhead at night, droppings on the attic floor and tunnels in the insulation usually mean roof rats. The fix has three parts that must happen together: remove the rats, seal every way in, and clean up safely. Here is how that works in a Gulf Coast attic.
- How do rats and mice get into Houston and Corpus Christi homes, and how do you seal them out?Mice fit through a gap about the width of a pencil and rats through a hole about the size of a quarter. On Gulf Coast homes they usually get in at the roofline, the garage door, brick weep holes, and where pipes, AC lines and cables enter. Sealing works when every gap is closed with the right material and the rodents already inside are removed.
- Why do rats and mice move indoors in fall and winter on the Gulf Coast?Rodents do not hibernate. When the first cool fronts reach Houston and Corpus Christi, mice that spent the summer outdoors and young rats from the fall breeding season look for warm shelter close to food, and attics, garages and wall voids fit. Here is the season-by-season pattern and a fall checklist that keeps them out.
- Found rat or mouse droppings? What to do and how to clean them up safelyDo not sweep or vacuum them. The CDC's method is to air the space out for 30 minutes, put on rubber or plastic gloves, soak the droppings with a bleach solution or disinfectant for 5 minutes, wipe them up with paper towels and bag them. Then find out whether rodents are still active and how they got in.
- How do you get rid of rats and mice: DIY traps or call a pest control pro?A mouse or two in the kitchen is often a do-it-yourself job with snap traps set the CDC way and the entry point sealed. Rats in the attic, activity that lasts more than a week or two, roofline entry points or a household with kids, pets or health concerns are good reasons to call a licensed pro. Here is how to decide and what each route involves.
- Rodent control in Corpus Christi: rats, mice and what coastal homeowners should doIn Corpus Christi, roof rats climb palms, dense shrubs and trees to reach attics, Norway rats follow drainage channels and burrow along foundations, and mice stay active through mild coastal winters. Effective control means inspecting for every entry, trapping matched to the rodent, sealing gaps and dealing with fleas, which Texas DSHS ties to local typhus cases.
Nearby
Questions people ask
What county is Katy, Texas in?
The City of Katy lies in three counties: Harris, Waller and Fort Bend. The wider Katy area also includes unincorporated land. Your county determines which public agency handles mosquito control.
Who sprays for mosquitoes in Katy?
On the Harris County side, Harris County Public Health's Mosquito and Vector Control Division handles surveillance and treatment. On the Fort Bend side, Fort Bend County Health and Human Services handles it. Ask the City of Katy about any city spraying in your neighborhood.
Did Fort Bend County spray for mosquitoes in 2026?
Yes. Fort Bend County declared a local public health emergency on June 16, 2026, after weeks of heavy rain and scheduled aerial spraying for June 22 to 24. The county's Environmental Health Division ran the effort.
Does Katy license pest control companies?
No. Pest control companies in Texas are licensed by the Texas Department of Agriculture's Structural Pest Control Service. Check a license on TDA's Current Licenses page or call (866) 918-4481.
Can landscape timbers bring termites to a Katy home?
Texas A&M AgriLife says recycled railroad ties and shoring timbers used in landscaping are thought to be the main way Formosan termites spread in Texas. It says these timbers must be properly fumigated, and creosote alone is no guarantee.
Sources
- Texas Municipal League directory: City of Katy
- Katy Area Economic Development Council: Government (three counties)
- Harris County Public Health: Mosquito and Vector Control Division
- KPRC Click2Houston: How to request mosquito help in Houston-area counties (June 2026)
- Covering Katy: Fort Bend County to conduct aerial mosquito spraying (June 2026)
- NWS Houston/Galveston: County Impacts Associated with Hurricane Beryl (2024)
- NWS Houston/Galveston: Hurricane Harvey
- Texas A&M AgriLife Extension E-367: Formosan Subterranean Termites
- Texas A&M AgriLife: History of the Red Imported Fire Ant
- AgriLife Today: Spring is the time for Texans to two-step toward fire ant control (2024)
- Texas A&M AgriLife Extension: Rodents in attics
- EPA: Termites, How to Identify and Control Them
- TDA: Structural Pest Control Licensing (categories)
- TDA: Termite FAQs
- TDA: Structural Pest Control Reports, Current Licenses
Featured providers pay to appear on this guide and are labeled as sponsored. This guide was written by our editorial team from the public sources listed above. It is general information, not legal advice; confirm licensing and terms directly with any provider.
