Mosquito Control in Colorado
Colorado's mosquito season is short but serious — the state ranks among the nation's hardest hit by West Nile virus nearly every year. Licensed local mosquito control knocks down the Culex mosquitoes that carry it and gives your yard back from late spring through early fall.
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West Nile Virus: Colorado's Real Mosquito Threat
Mosquitoes in Colorado are more than a backyard nuisance — they're a public-health concern. Colorado is consistently one of the states most affected by West Nile virus in the United States, and the Colorado Department of Public Health and Environment (CDPHE) tracks human cases, infected mosquito pools, and 'spray nights' across Front Range and plains counties every summer.
The main carrier here is Culex tarsalis, a mosquito of the eastern plains and Front Range that breeds in irrigation water, ditches, and standing water tied to the South Platte and other drainages. Risk in Colorado typically climbs through July and peaks in August into early September — exactly when evenings are most pleasant to be outside. Reducing the mosquito population around your home is the most practical way to lower the chance of a bite that matters.
Why Mosquitoes Thrive in a Dry State
It seems backwards that semi-arid Colorado would have a mosquito problem, but the water is man-made. Lawn irrigation, flood-irrigated farm fields and pastures, ditches, retention ponds, and the river corridors give Culex mosquitoes all the standing water they need, while warm summer temperatures speed up breeding. Add a bottle cap of water in a clogged gutter, plant saucer, tarp, or bird bath and even a tidy yard produces mosquitoes.
Because the habitat is so tied to standing water, knocking down adults and treating breeding sites together works far better than a can of repellent — especially during a West Nile summer.
The Mosquitoes You'll Meet in Colorado
Culex tarsalis
The western encephalitis mosquito and Colorado's primary West Nile carrier. It breeds in irrigation water, ditches, and standing water on the plains and Front Range, and bites mostly from dusk through the night.
Culex pipiens
The northern house mosquito, more common in urban Front Range areas. It breeds in stagnant, organically rich water like storm drains and neglected pools and also transmits West Nile virus.
Aedes / floodwater mosquitoes
Aggressive daytime biters that hatch in big numbers after heavy rain or snowmelt floods low areas. More of a nuisance biter than a major disease vector, but they make a yard miserable fast.
How Professional Mosquito Control Works
A licensed Colorado mosquito program attacks the problem at every stage rather than just masking bites:
- Barrier sprays — a residual treatment applied to shrubs, fence lines, and shaded resting spots where adult mosquitoes hide during the heat of the day, reapplied through the season
- Larviciding — treating standing water you can't drain (ditches, low spots, water features) to kill larvae before they become biting adults
- Source reduction — finding and eliminating the hidden breeding sites around your property
- Automated misting systems — for properties that want hands-off, scheduled protection
- Special-event sprays — a one-time knockdown before a wedding, graduation party, or cookout
Cut Mosquitoes Around Your Colorado Home
- Empty or refresh anything that holds water weekly — saucers, buckets, toys, tarps, wheelbarrows, bird baths
- Keep gutters clean and check that irrigation isn't leaving standing water in low spots
- Change pet water and bird-bath water every few days
- Stock ornamental ponds with mosquito fish or use larvicide dunks
- Use fans on patios — mosquitoes are weak fliers — and wear repellent at dusk during West Nile season
What Mosquito Control Costs in Colorado
Most Colorado homeowners use a seasonal plan — recurring barrier treatments from late spring through early fall — priced by yard size and how much shaded, vegetated habitat you have. One-time event sprays and misting-system installs are priced separately. Every pro in our directory will quote your property for free, so you know the cost before you commit.
Mosquito Control Across Colorado
Local coverage statewide — growing as we expand.
- Denver
- Colorado Springs
- Aurora
- Fort Collins
- Boulder
- Lakewood
- Pueblo
- Greeley
- Longmont
- Loveland
- Castle Rock
- Grand Junction
More Colorado Pest Control
Dealing with more than one pest? We handle them all across Colorado.
Frequently Asked Questions — Mosquito Control in Colorado
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