The short version
Most yard treatments in Longmont cost about $75–$200 per visit, or $350–$900 for a season. Removing standing water costs nothing and helps the most.
- A visit in Longmont usually costs $75–$200.
- A full season usually runs $350–$900.
- Removing standing water is free and helps most.
- Ask what happens if bites return between visits.
- Compare plans by visits and products, not just price.
Anyone in Longmont tired of mosquito bites at home.
What to look for
Mosquitoes breed in standing water, even a bottle cap's worth. In summer heat, eggs become biting adults in about a week. Around Longmont, mosquito season runs from about May through September. Often the source is a neighbor's yard or a storm drain.
- 1Adults resting under deck boards or in ivy.
- 2Ornamental pond with no fish or pump.
- 3Swarms rising from shrubs when you brush past.
- 4Dogs testing positive for heartworm.
- 5Bites within minutes of stepping outside at dusk.
- 6Welts on ankles and calves after yardwork.
Why it’s worth acting soon
- Each new generation is bigger than the last.
- Bites can spread West Nile virus.
- Itchy welts, especially for kids.
- Heartworm risk for dogs.
bite, to get protein for their eggsOnly female mosquitoesUS CDC in standing water, from a bottle cap to a pondMosquitoes breedUS EPA West Nile virus is the most common mosquito-borne disease in the U.S.Mosquito diseasesUS CDC 🧮
Estimate a season of mosquito control in Longmont
Adjust for your situation to see a ballpark range.
Estimated range
A rough guide only. Your quote depends on your yard and how many visits you need.
Treatment options and typical costs
Property Inspection for Breeding Sites
$0–$150 (often bundled with a first treatment)
An inspection in Longmont also gives you a realistic idea of how much a treatment can do on your lot. A wetland yard is a different job from a dry cul-de-sac.
- Time
- 30–60 minutes
- Best for
- Every yard; finds where mosquitoes actually breed
Source Reduction and Larviciding
$75–$150 per visit
Source reduction means removing the water mosquitoes need: tipping containers, clearing gutters, fixing drainage, and filling ruts around your Longmont yard. It is the cheapest control there is.
- Time
- 45–90 minutes
- Best for
- Yards with standing water, clogged gutters, ponds, or drains
Misting Systems and In2Care-Style Stations
misting $2,000–$4,500 installed plus refills; stations $200–$500 per season
Misting systems put product into the air on a schedule whether mosquitoes are present or not, which raises resistance and pollinator concerns in Longmont neighborhoods. Ask about sensors, timers, and off-switch etiquette.
- Time
- Misting: half a day. Stations: under an hour.
- Best for
- Specific yards: heavy outdoor use or spray-averse owners
Barrier (Residual) Yard Treatment
$75–$200 per visit; $350–$900 per season
Botanical or essential-oil products are an option. They wear off in about a week. Expect more frequent visits and a somewhat lower ceiling on results.
- Time
- 20–45 minutes per visit, repeated every 3–4 weeks
- Best for
- Shaded yards with shrubs, ivy, and dense landscaping
Prices are typical published ranges. Ask what’s included before you compare quotes.
Adult mosquitoes spend the day in shady, leafy beds like this one, so that's where a barrier treatment goes.What mosquito control costs in Longmont.
- A typical home in Longmont is worth around $550k, and a season of treatment costs far less than most outdoor projects. With a season running from about May through September around Longmont, most plans cover five or six visits. - Barrier (Residual) Yard Treatment: $75–$200 per visit; $350–$900 per season - Misting Systems and In2Care-Style Stations: misting $2,000–$4,500 installed plus refills; stations $200–$500 per season - Source Reduction and Larviciding: $75–$150 per visit - Property Inspection for Breeding Sites: $0–$150 (often bundled with a first treatment)
Local mosquitoes conditions in Longmont.
An inspection in Longmont usually starts outside and works inward, checking the foundation, gaps around doors and windows, and any moisture or clutter near the structure first. Around Longmont, the area is mostly suburban, so mosquitoes pressure can differ from one block to the next depending on how tight the entry points are and how much food, water, or shelter is close by. Longmont sits in a semi-arid climate, and that sets the pace for mosquito activity here: late spring through early fall; year-round in the deep south. A provider who works Longmont and Colorado every day can point out the specific conditions that matter most here, and getting the scope, price, and follow-up terms in writing makes it easier to compare options. Knowing Longmont's seasonal timing lets you schedule treatment before the busy stretch rather than after it, which usually means faster service and a more accurate quote.
Mosquitoes that bite indoors usually slip in through gaps around doors or torn window screens.Which mosquitoes bite around Longmont.
They can travel a long way from where they hatch. Floodwater mosquitoes hatch in big waves after heavy rain or snowmelt. They're the main West Nile carriers. They breed in storm drains. House mosquitoes (Culex) bite from dusk into the night.
Mosquito season in Longmont.
Numbers usually peak in July and August. West Nile cases usually peak in late summer.
A year of mosquitoes in Longmont.
- Spring: dump water and clean gutters before May. - Winter: fix drainage and store containers upside down. - Fall: activity fades with cooler nights. - Summer: peak season in Longmont, especially July and August.
The weekly water walk.
- Saucers and pots: empty them or add sand. - Gutters: clear leaves so water drains. - Tree holes: fill them with sand. - AC drip lines and downspouts: make sure water drains away. - Pet bowls: refresh daily. - Birdbaths: change the water twice a week. - Tarps and covers: pull them tight so water runs off. - Toys and buckets: store them upside down.
Avoiding bites.
- Clothing: long sleeves and pants help at dusk. - Repellent: DEET, picaridin, IR3535 or oil of lemon eucalyptus. - Timing: tiger mosquitoes bite by day; house mosquitoes at dusk. - Screens: repair holes in window and door screens. - Fans: a patio fan keeps weak-flying mosquitoes away.
Low-cost ways to cut mosquitoes.
- Mosquito fish: they eat larvae in ornamental ponds. - Mosquito dunks: Bti tablets kill larvae in rain barrels and ponds. - Lights: yellow bug lights attract fewer insects to the porch. - Trimming: thin out dense shrubs and tall grass. - Pumps and fountains: moving water breeds far fewer mosquitoes.
Mosquito or look-alike?
- Non-biting midges: swarm near water at dusk. Harmless, just annoying. - Crane flies: look like giant mosquitoes. They don’t bite. - Mosquitoes: slim, long legs, and a needle-like mouth. - No-see-ums: tiny biting gnats near marshes. Screens need a finer mesh.
When a bite needs a doctor.
Spreading swelling or an infected-looking bite needs a check too. See a doctor for high fever, stiff neck or confusion. About one in five get a fever, headache or body aches. Most people infected with West Nile virus never feel sick. Most bites just itch for a few days.
Protecting your pets.
Talk to your vet about year-round prevention. Heartworm reaches dogs through mosquito bites, and cats can get it as well; in Longmont the main exposure runs July through September. Refresh pet water bowls daily; in dry Longmont a bowl or an irrigation puddle is often the only standing water on the block. Keep animals inside until a yard treatment dries.
What a treatment visit looks like.
They dump or treat standing water. The tech walks the yard first. A visit usually takes 20 to 45 minutes. Most plans repeat every three to four weeks. Then they spray shady shrubs, where adults rest. Larvicide goes in water you can't drain.
Rain barrels and ponds.
- Ponds: fish and moving water keep larvae down. - Barrels: cover openings with fine mesh. - Pool covers: drain standing water after rain. - Tarps: shake out any that hold rainwater. - Gutters: clear them so water drains away. - Bird baths: change the water every few days.
Questions to ask before you sign.
- How often will you come? - What product will you spray? - When can kids and pets go back outside? - How do you protect bees and flowers? - What happens if bites come back between visits? - Do you treat standing water too?
Ways to keep the cost down.
- Trim dense shrubs so fewer adults can rest there. - Dump standing water every week. It’s free and works. - Book early. Spring sign-ups sometimes cost less. - Compare what each plan includes, not just the price. - Ask about a shorter plan for peak months only.
What affects the price
- Commercial or multi-unit property.
- Travel distance from the company's base.
- One-time visit versus a seasonal plan.
- Number of visits the local season needs.
- Ponds, creeks, or wetland edges on the property.
- Re-treatment policy between scheduled visits.
- Local labor rates and licensing costs.
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What's your biggest concern about mosquito control costs?
When to call for help
Ponds, drains and dense shrubs are hard to handle yourself. early in the season, before the first big wave. Dumping water should come first. Call if bites still keep you indoors.
What you can do yourself
They also spray where adults rest, every few weeks. A pro adds larvicide for water you can't drain. Use repellent and run a fan on the patio. The biggest win is free: dump standing water every week.
Mosquitoes in Longmont
Summer highs around 88°F in Longmont speed up the life cycle. In Longmont's neighborhoods, the usual sources are gutters, plant saucers, kids' toys and birdbaths. Longmont only gets about 14 inches of rain a year, so local mosquitoes breed where people add water: sprinklers, pools, fountains and AC drips.
Local research
Mosquitoes in Longmont, CO: what the public record shows
Before you compare quotes, it helps to know which mosquitoes actually live in Colorado, when they are busiest around Longmont, and what the state figures look like. Everything below links to the agency or university page it came from.
West Nile neuroinvasive disease cases, 2024
Neuroinvasive counts are the most reliable state comparison because nearly all severe cases are diagnosed and reported.
CDCWhen mosquitoes are busiest around Longmont
CDC: West Nile transmission June through October, peaking late August to early September. Illinois found its first positive mosquito batch of 2025 on May 9, so larval control should start in May.
For context, nationally
- 1,808 — West Nile virus disease cases reported, 2024. CDC
- 1,347 (75% of cases); 173 deaths — West Nile neuroinvasive disease cases, 2024. CDC
Sources: CDC. Figures are quoted as the source prints them. How we check our sources
Simple ways to keep mosquitoes away
- Tighten lids on trash and recycling bins.
- Wear DEET or picaridin repellent outdoors.
- Trim shrubs and ivy to reduce resting cover.
- Book barrier treatments before the season starts.
- Keep pools chlorinated and covered when unused.
When you compare quotes, look at the season total, how many visits it covers and what happens if the bites come back.Did you know?
Larvae are called wrigglers; pupae are tumblers
A female's wings beat hundreds of times per second
Questions people ask
Why do mosquito quotes vary so much?
Some include re-sprays. Compare what's included, not just the price. Companies use different products and visit on different schedules.
Is a misting system worth the cost?
Installation runs into the thousands, plus refills. Regular spraying and source removal usually do the job. Rarely, for most yards.
How much does a single mosquito treatment cost?
Usually $75–$200 per visit. Bigger or shadier yards cost more.
What should a mosquito control quote include?
Also what happens if bites return. Larvicide should be listed if you have standing water. Visits, products, and what gets treated.
How long does a mosquito treatment last?
A barrier spray usually lasts three to four weeks. Heavy rain can shorten that.
What if the mosquitoes are coming from my neighbor's property?
Treat your own yard and talk to your neighbor. Your local mosquito control district or health department can also help. That's common.
Can I get rid of mosquitoes permanently?
They fly in from nearby. Removing water and spraying resting spots cuts them down a lot. Not completely.
Should I worry about West Nile virus?
Around Longmont, yes, mosquitoes can transmit West Nile virus and other diseases, so control is about reducing both the nuisance and the risk. West Nile virus is the most common mosquito-borne disease in the U.S.
When is mosquito season in Longmont?
It runs from about May through September. Evening biters are usually house mosquitoes.
Do mosquitoes in Longmont carry West Nile?
Cases usually peak in late summer. Repellent and dumping standing water are your best protection. They can. West Nile is found in every lower-48 state, Colorado included.
Nearby cities
Related guides
Sources (11)
The facts in this article come from the public sources listed above. Every home is different, so ask the company you talk to about pricing and what’s included. Published by Mosquito Exterminator · Updated September 11, 2026 · How we write these guides