Idaho’s expanding Treasure Valley has turned irrigation canals into a rat highway, sparking a surge of pest‑control calls that has outpaced local resources. Pest techs report over 1,000 miles of waterways linking Boise to outlying suburbs, allowing Norway and roof rats to spread unchecked. This rapid spread has already cost homeowners in Boise and Eagle more than $30,000 in repairs.

The infestation, first noticed by retired naturalist Jane Rohling in 2022, exploded as newcomers from California carried rodents into the region. Local officials debate responsibility, with some calling for a state‑wide rat‑control mandate. Meanwhile, businesses in the pest‑control sector see a boom, as companies like Wild West Pest Control and Nampa’s Kirk Dean report record service requests in Idaho.

State lawmakers failed to pass a bill that would have formalized a rat‑nuisance framework, citing fears of government overreach and competition with private operators. With Boise’s population growing at 2.5% annually, the canal‑driven spread threatens infrastructure, public health, and property values. Local agencies now face mounting pressure to coordinate a region‑wide response by 2027 amid rising costs and demographic shifts.