Pest library

Ants in Valley homes

Argentine ants are the ant homeowners across the San Fernando Valley, Conejo Valley and Westside deal with most. They form massive interconnected colonies that can stretch across whole neighborhoods, with thousands of cooperating queens instead of just one. They come inside chasing water and sugar, especially once the heat sets in, and a few scouts can turn into a steady trailing line by the next morning.

Reviewed by Sam Karbelnig, owner. Last updated September 2026.
Ants, a common pest in San Fernando Valley homes Ants
Identify it

How to tell it's this one

  • Thin lines of tiny brown ants, about one eighth of an inch, following the same trail day after day
  • Trails run along edges: baseboards, counters and window frames, the same crack every time
  • A faint sweet smell when crushed, that's the Argentine ant giveaway
  • Heaviest activity around sinks, pet food bowls and anywhere there is a water source
  • Winged ants swarming after rain are early season activity, not a different pest
Where it hides

Where it hides in Valley homes

  • Under slabs and beneath potted plants near the foundation
  • Along irrigation lines and sprinkler boxes where the soil stays damp
  • Inside wall voids near plumbing with condensation
  • Under mulch beds and stacked patio pavers
  • Around AC condensate lines
Season

When it shows up

From our own route records, month by month.

Full Valley pest calendar
Right now

What to do right now

  1. 1Wipe down the trail you're seeing with soapy water, don't spray store bought insecticide on it, that scatters the colony and makes it harder to treat
  2. 2Fix any dripping faucets or irrigation leaks near the house
  3. 3Keep pet food bowls picked up between feedings
  4. 4Seal open food containers on the counter
What we do about it

How Facility handles ants

We treat ants at the colony, not just the trail in your kitchen. Our techs use low toxicity, environmentally friendly products on general service, placing bait where ants are actually feeding and treating the perimeter so new trails don't start. Because Argentine ant colonies are interconnected, ongoing service on a Monthly, Hybrid or Bi Monthly plan controls them far better than a single spray. Every visit is backed by our 30 day guarantee: if activity returns we re treat the problem areas at no additional charge.

Sam Karbelnig
Not sure it’s a ant? Send a photo through the quote form and Sam will tell you, free.

Ants questions

Why do I have so many ants at once?

Argentine ants form supercolonies with thousands of cooperating queens, so what looks like one line of ants is actually connected to a much bigger network next door. That's why store bought spray only knocks down what you can see and the trail comes back days later. Treating the colony, not the trail, is what actually stops it.

What kills ants without killing my dog?

Low toxicity bait placed where ants are feeding, away from pet reach, is the safest and most effective option for a home with pets. We use environmentally friendly products on general service and place bait in spots your dog or cat can't get into. Spraying visible trails does not solve the underlying colony.

Why are there more ants after it rains?

Rain floods ant nests in the soil, so colonies move indoors or up into walls looking for dry ground. That's why the first ant calls after a storm spike hard across the Valley. It settles once the ground dries, but an indoor trail usually needs treatment to fully clear.

Do ants mean my house is dirty?

No, ants are after water and easy food, not a sign of poor housekeeping. Argentine ants will trail for a single dropped crumb or a damp sink in an otherwise spotless kitchen. It is about opportunity, not cleanliness, and it happens in the cleanest homes in the Valley.

Will ants go away on their own in winter?

They slow down but don't fully leave. Argentine ant activity drops in cooler months and picks back up hard once the weather warms in spring, which is why ongoing service through the year keeps colonies from rebuilding near the house.

Ready when you are.

Call, text, or send a quote request and Katie or Sam calls you back during office hours. No visit fee, no contract.

CallTextGet a free quote