Ants are common household pests. They don’t carry
disease, but can be annoying.
Argentine ants are the most common cause of ant invasions
indoors, but other species may cause problems in this area.
Knowing which ant is causing your issue is important, since
different ant species have different food preferences and will
take different types of bait. For ant identification and control
information, contact the District laboratory at (650) 344-8592.
If you see ants indoors, your first priority is to kill the ants
that are inside and stop additional ants from coming in. Clean up
or remove whatever the ants are feeding on, then wipe away ant
trails with soapy water. Entry points can be sealed with caulk.
In many cases, this is enough to stop the problem. If ants
continue to invade, you may need to use an ant bait to kill the
colony. Place bait stations near where you see ants entering.