West Nile Virus Has Arrived in LA County: What Pasadena Homeowners Need to Know

Hate mosquitoes? Well, you’re about to hate them a little bit more (especially in Pasadena). 

You already know Pasadena has its charms. But, unfortunately, this is not one of them. 

Recently, West Nile Virus arrived in LA County, and it’s a little more serious than a little buzzing and biting. With each buzz and bite comes a risk of this disease, which if left untreated, can land you (or a member of your family) in the hospital. 

So, how does West Nile continue to spread? And most importantly, what can you do about it? 

What Is West Nile Virus? 

West Nile Virus spreads through the bite of an infected mosquito. All it takes is one bite from the wrong mosquito at the wrong time. 

For most people, symptoms present as a fever, headache, nausea, body aches, and a mild skin rash. For most, this isn’t serious. The issue is when it goes untreated or quickly reaches the nervous system. In serious cases, it can cause encephalitis (inflammation of the brain), meningitis, paralysis, and can be life-threatening. 

And here’s what just happened in LA County (2026): 

Our area’s first human case of West Nile Virus. An Antelope Valley resident is currently hospitalized after developing West Nile encephalitis. 

So mosquito control is more important now than ever.

Why LA County Mosquito Pressure Is Growing 

Unfortunately, Pasadena’s mosquito problem isn’t just an annoyance anymore. In 2025, California reported 18 locally acquired dengue fever cases (which was a sharp rise from the year before). Health officials have noted that invasive species are no longer retreating the way they used to. 

In Pasadena, the combination of warm weather, irrigation, dense landscaping, and the presence of the aggressive day-biter (the Aedes mosquito) mean only one thing: 

Mosquito bites 24/7. 

What You Can Do About Mosquitoes Right Now 

There are plenty of tasks you can do to reduce mosquito populations on your Pasadena property: 

• Remove all standing water - walk your property often and check for water collecting in flower pots, bird baths, plant saucers, pool covers, buckets, and low spots in the lawn. 
• Use insect repellent - whenever you spend time outside, apply a mosquito repellent to keep them at bay. 
• Install screens - make sure each window and door has a screen to keep mosquitoes out of your house. 
• Keep pools clean - clean and chlorinate your pool often, and drain excess water from pool covers. 

Why Professional Mosquito Control is a Necessity This Year

Do-it-yourself steps can help reduce mosquito populations, but they can’t do it all. 

And that’s why we exist. 

Mosquito Squad of Pasadena kicks mosquitoes (even Aedes mosquitoes) to the curb with our barrier treatment. 

Imagine this: you have a protective shield around your property that provides consistent mosquito control all year long. 

A lot less swatting in the middle of the day. 

Finally enjoying your backyard patio. 

Hosting that barbecue (without all the buzzing and biting).

All of this will be possible with our barrier treatment. It's applied on a recurring 21-day cycle by trained technicians, targeting shaded areas, dense vegetation, and resting spots that mosquitoes rely on all season long. 

And it helps control up to 85-90% of mosquitoes on your property. Because in Pasadena, where mosquito season never really stops, consistent treatment is what actually keeps populations from rebounding.

Either way, you shouldn't have to spend your summer worrying about West Nile every time a mosquito buzzes by. With the right treatment in place, you'll get back the evenings on the patio, the backyard gatherings, and the peace of mind that comes with knowing your property is protected.

With West Nile Virus confirmed in LA County this season, the best time to get a treatment plan in place is now.

Wondering how to protect your Pasadena property from mosquitoes this season? Call Mosquito Squad of Pasadena at (213) 238-5564 or contact us online for a free quote.