February 19, 2026
Why Idaho Needs to Act Early on Invasive Rats
By: ID Senator Tammy Nichols
Over the past few years, parts of Idaho, especially the Treasure Valley, have seen a growing problem with invasive rats, including Norway rats and roof rats. In Ada County, officials are getting more and more calls each week about rat sightings and infestations. This is a clear sign the problem is growing.
Rats are more than just a nuisance. They chew through electrical wires, sewer lines, and buildings, which can lead to fires and costly repairs. They contaminate food and water and can carry diseases that spread to people and animals. Rats also reproduce very quickly. Just one rat can produce up to 800 offspring in two years if nothing is done. Once rat populations reach that level, they are much harder and more expensive to control.
Local leaders and experts have confirmed this is a real issue. Last month, we held a public and legislative informational meeting at the Statehouse to discuss what is happening on the ground. At that meeting, we heard directly from an Ada County commissioner, the Ada County Pest and Abatement Director, and the Director of the Idaho Department of Agriculture. All three shared the same message: rat activity is increasing, especially in urban areas, and early action is critical to prevent a much larger problem.
Other places have shown that early action works. Alberta, Canada once faced a similar rat problem. By focusing on early reporting and coordinated response, Alberta was able to get rid of rats and keep them from becoming established. Idaho still has that same opportunity.
That is why I recently introduced legislation to address this issue early and responsibly. The rat abatement bill is focused and practical. It declares invasive rats a public nuisance under existing Idaho law and improves coordination and reporting so the problem can be addressed quickly. It does not create a new government program, does not ban rats as pets or feeder animals, and does not force cities or counties to spend money or take action. Communities without a rat problem are not affected.
This bill follows Idaho’s common-sense approach to invasive species: act early, work together, and respect local resources. Fixing this problem now will cost far less than waiting until it grows out of control.
Idaho has a real chance to stay ahead of this issue, and that’s exactly what this legislation is meant to do.
In Liberty,
Senator Tammy Nichols
District 10
