Utah does not set a liability insurance minimum for pesticide businesses. The commercial pesticide business license application asks for the fee and proof of a qualifying party. It has no insurance section, no financial responsibility form and no certificate to file. Nothing in the licensing rules requires you to prove you can pay for the harm you cause.
That should change how you think about limits rather than whether you carry them. When the state sets a floor, most operators buy the floor and argue about the rest. When the state sets nothing, the number comes from your contracts, and those numbers are higher. A property management company on the Wasatch Front, a hospital system, a school district, a university, a ski resort, a national account program or a general contractor will each require a certificate before you start work, and $1,000,000 per occurrence with a $2,000,000 aggregate plus additional insured status is the common ask. Being out of compliance with a contract is worse than being out of compliance with a regulation, because the customer can terminate immediately and the loss stays with you.
What Utah regulates instead is competence and conduct. Since January 1, 2019, every commercial pesticide business license requires a qualifying party: someone who has held a Utah applicator license for two or more years, held a reciprocal out of state license that long, or holds an associate's degree or higher in a related field such as horticulture, agriculture, entomology, biology or chemistry. Lawn care companies using only herbicides labeled Warning or Caution are exempt. Utah decided the risk worth regulating was an unqualified operator opening a company, not an uninsured one. While you check what your own contracts require, put the company on BestPestControlIn.com. Listing is free for any licensed pest control company, Utah homeowners search it by ZIP code and by state, the listing carries a backlink that helps your own site rank, it sends referrals, and we write blog posts on the companies in the directory.