The Pavement Ant (Tetramorium immigrans) is dark brown to black with parallel grooves on head and thorax and typically measures ⅛ inch. Pavement ants (Tetramorium immigrans) are small, dark brown to black ants that get their name from their habit of nesting under pavement, sidewalks, driveways, and building foundations. They push fine.

The Pavement Ant is generally low-risk, but caution is still advised. No significant sting; not medically dangerous. Nuisance pest. Can contaminate food. Nesting under slabs can occasionally undermine pavement over time.

In Arizona, pavement ants are most often encountered in the following situations: Small piles of fine soil along cracks in sidewalks, driveways, or the foundation. Slow-moving dark brown ants in trails near pavement edges. Ants entering the home through foundation cracks or expansion joints.

The Pavement Ant is most active during: Year-round; most active spring through fall. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Seal cracks in the foundation and pavement. Treat perimeter regularly. Eliminate food sources near entry points.

Granular or gel bait placed along active trails and near nest entrances. Perimeter spray treatment. Crack and crevice applications along foundation.

Most store-bought ant sprays kill only the workers you see, while the queen and colony remain protected underground. Effective Pavement Ant control requires baiting or targeted colony treatments that workers carry back to the nest. Pest Control Bros uses professional-grade products and application methods that address the entire colony.