If you’re wondering what time Horry County sprays for mosquitoes, you’re not alone. Every summer, residents from Conway to Myrtle Beach hear the familiar buzz of spray trucks or notice planes overhead at dusk. But knowing exactly when they’ll hit your neighborhood can feel like guessing lottery numbers.
Here’s the quick answer: Horry County mosquito spray trucks operate Monday through Thursday, starting around 30 minutes before sunset and continuing until about 11:00 PM. This schedule runs from early May through October, but crews don’t spray every night. Weather conditions, mosquito population levels, and specific neighborhood requests determine when and where they spray.
Current 2026 Mosquito Spray Schedule for Horry County
The county’s mosquito control program kicks off in early May each year. For 2026, truck-mounted spraying operations are scheduled to begin Tuesday, May 5th, weather permitting.
Ground spraying happens four nights per week:
- Monday evenings
- Tuesday evenings
- Wednesday evenings
- Thursday evenings
Spray trucks typically roll out about 30 minutes before sunset. In May, that means starting around 7:30 PM. By July, when days are longest, trucks might not begin until 8:00 PM. Operations usually wrap up by 11:00 PM, though crews sometimes work until 11:30 PM during peak mosquito season in Horry County.
The county doesn’t spray Friday through Sunday. This gives residents predictable mosquito-free evenings for weekend barbecues and outdoor activities.
How to Check If Your Area Is Being Sprayed Tonight
Horry County maintains an interactive spray map on their website showing which neighborhoods are scheduled for treatment. The map displays red outlines around target spray zones for both truck and aerial applications.
To check your specific area:
- Visit the Horry County Stormwater Department website
- Navigate to the Mosquito Control section
- Click on the Spray Map link
- Enter your address or zoom to your neighborhood
- Look for red boundary lines indicating scheduled spray zones
The map updates daily by 3:00 PM. If your area shows up in red, expect spray trucks between dusk and 11:00 PM that evening, assuming weather cooperates.
What About Aerial Spraying?
Aerial mosquito spraying happens less frequently than truck spraying. When scheduled, planes typically start at dusk and continue into late evening. The county uses aircraft to cover large wetland areas, flood zones, and neighborhoods where truck access proves difficult.
Aerial spraying targets specific outbreak areas rather than following a regular schedule. The same online spray map shows aerial zones, usually with 24-48 hours advance notice.
Weather Conditions That Cancel Mosquito Spraying
Just because it’s Monday through Thursday doesn’t guarantee spraying will happen. Several weather factors can postpone or cancel operations:
Wind speeds above 10 mph: High winds blow the spray off target, making treatment ineffective and potentially wasteful. Crews monitor wind conditions hourly.
Rain or thunderstorms: Precipitation washes away spray before it can work. Even light drizzle stops operations. Crews need at least two hours of dry weather after rain before resuming.
Temperature below 50°F: Mosquitoes become inactive in cool weather, making spraying pointless. This rarely affects summer operations but can delay early May or late October treatments.
Temperature inversions: These atmospheric conditions trap spray close to the ground, potentially increasing exposure. Though rare in coastal South Carolina, inversions occasionally force cancellations.
What Chemicals Does Horry County Use for Mosquito Control?
The county applies EPA-approved products containing synthetic pyrethroids, typically permethrin or sumithrin. These chemicals mimic natural compounds found in chrysanthemum flowers.
According to EPA guidelines for mosquito control, these products break down quickly in sunlight and pose minimal risk to humans and pets when applied correctly. The ultra-low volume (ULV) application method uses tiny droplets that target flying mosquitoes while minimizing ground deposition.
Residents with respiratory conditions like asthma might experience irritation from the spray. The county recommends these individuals stay indoors with windows closed during active spraying.
Protecting Your Garden and Beehives
If you grow vegetables or keep bees, take extra precautions during spray season. Wash all homegrown produce thoroughly before eating. Scrub firm vegetables and peel fruits when possible.
Beekeepers should register their hives with Horry County Stormwater by calling 843-381-8000. The county maintains a no-spray buffer zone around registered apiaries to protect pollinator populations.
Why County Spraying Might Not Be Enough for Your Yard
While county-wide spraying helps reduce overall mosquito populations, it has limitations for individual property protection. Spray trucks can only treat public roads and rights-of-way. They can’t reach mosquitoes breeding in your backyard.
Common mosquito breeding spots trucks miss include:
- Clogged gutters holding stagnant water
- Bird baths and pet water bowls
- Children’s toys left outside
- Tarps or pool covers collecting rainwater
- Dense vegetation along fence lines
- Low-lying areas with poor drainage
County spraying also follows a fixed schedule that might not align with your outdoor activities. If you’re planning a graduation party on a Saturday, the Thursday night spray won’t provide adequate protection through the weekend.
Professional mosquito control services treat your entire property, including breeding sites the county can’t reach. Technicians apply barrier treatments to vegetation where mosquitoes rest during the day, providing 21-30 days of protection regardless of county spray schedules.
How to Request Mosquito Spraying for Your Neighborhood
Living in unincorporated Horry County? You can request mosquito spraying for your area by contacting the Road and Drainage Hotline at 843-381-8000. Provide your address and describe the mosquito problem you’re experiencing.
The county prioritizes requests based on:
- Number of complaints from an area
- Proximity to known breeding sites
- Recent flooding or standing water issues
- Mosquito trap data showing high populations
Requests typically receive responses within 3-5 business days. During peak season (June through August), response times may extend to 7-10 days due to high demand.
What If You Live Within City Limits?
Residents within Myrtle Beach, Conway, or other incorporated areas should contact their city government rather than the county. Each municipality manages its own mosquito control program with different schedules and procedures.
Myrtle Beach, for instance, contracts with private companies for mosquito control and follows a different spray schedule than the county. Check your city’s website or call city hall for specific information.
Frequently Asked Questions
Can I opt out of county mosquito spraying?
Yes, you can request exclusion from spray routes by calling 843-381-8000. However, trucks spray from public roads, so complete avoidance might prove impossible if you live on a treated street. The county will note your preference and minimize exposure where feasible.
Is it safe to be outside during mosquito spraying?
The EPA considers properly applied mosquito spray safe for humans and pets. However, people with respiratory sensitivities should stay indoors during active spraying. If you encounter a spray truck, simply go inside until it passes.
How long after spraying before mosquitoes return?
County spraying kills adult mosquitoes on contact but doesn’t prevent new ones from emerging. Mosquitoes typically return within 3-7 days as eggs hatch and adults migrate from untreated areas. This explains why the county sprays multiple times weekly during peak season.
Does rain immediately after spraying waste the treatment?
Yes, rain within two hours of application significantly reduces effectiveness. The county monitors weather forecasts and avoids spraying when rain appears likely. This sometimes creates gaps in the schedule during South Carolina’s afternoon thunderstorm season.
Comparing County Spraying to Professional Mosquito Treatment
Understanding the differences between county spraying and professional residential pest control helps you make informed decisions about protecting your family from mosquitoes.
County spraying covers broad areas but can’t eliminate mosquitoes from your specific property. Think of it like the difference between city street sweeping and hiring someone to clean your driveway. Both help, but one provides targeted results.
Professional mosquito control offers several advantages:
- Treatment of your entire property, not just the street
- Elimination of breeding sites in your yard
- Barrier applications lasting 3-4 weeks
- Flexible scheduling around your events
- Targeted treatment of problem areas
Many homeowners combine both approaches. They appreciate county spraying for general population control while investing in professional treatment for their immediate property.
Just as homeowners dealing with fire ant swarms or termite problems need targeted professional treatment, mosquito control often requires more than county-wide spraying alone.
Making Mosquito Control Work for Your Schedule
Knowing what time Horry County sprays for mosquitoes helps you plan outdoor activities and protect your family. The Monday through Thursday schedule from dusk to 11:00 PM provides a framework, but remember that weather, mosquito populations, and specific area needs affect actual spray times.
Check the county’s spray map before planning evening events. Keep windows closed on spray nights if you have respiratory concerns. Register beehives to protect pollinators. And consider professional mosquito control for comprehensive property protection that works on your schedule, not the county’s.
Ready to take control of mosquitoes in your yard instead of waiting for the next county spray truck? Contact Wilkey Pest Control for a free consultation. We’ll create a customized mosquito control plan that keeps your property comfortable all season long, regardless of when Horry County sprays for mosquitoes in your neighborhood.
