Cockroaches need three things to establish a colony: food, water, and warmth. Peralta's housing stock gives them exactly that. A blend of historic adobe-style homes near the river valley and newer stucco construction further from the urban core. Combined with Peralta's climate — a high-desert climate with hot, dry summers and cold winters, moderated by roughly a mile of elevation compared to the low deserts further south — indoor cockroach pressure rarely lets up on its own.
Treatment starts with locating the harborage points — the tight, warm, food-adjacent spaces roaches actually live in — and applying gel bait directly there rather than spraying open floor space. This targets the colony at its source and avoids the resistance issues that plague over-the-counter sprays. We follow up to verify the population has collapsed, not just scattered.