Pool service operations sit at the intersection of several regulated areas. Inheriting a violation can cost more than the route is worth.
Chemical handling and storage. Most states require commercial chemical storage to follow specific rules (separation of acids and oxidizers, secondary containment, SDS posted, employees trained). Inspect the seller's storage. Photo it. If it's non-compliant, you'll inherit any open complaints.
Transportation of hazardous materials. USDOT rules apply when transporting more than de minimis quantities of certain pool chemicals. Most service routes stay under thresholds, but check, and confirm the seller's truck is properly placarded if needed.
Wastewater and pool-water disposal. Some municipalities prohibit draining pools to storm drains (especially with chlorine, salt, or copper). Fines can be $500–$5,000 per incident. Ask the seller how they handle drain-and-acid washes; in writing.
Licensing. Several states require a contractor or pool-service license (CA, FL, AZ, NV among them). Confirm the seller's license is current, in their personal name (transfers can be tricky), and what your path is to obtain your own. Some states honor reciprocity; others require you to test fresh.
Permits for repair work. If the route includes any repair work (heater swaps, plumbing, electrical near water), local permit and licensing requirements vary widely. Operating without proper permits exposes you to fines, customer disputes, and insurance denial.
Insurance review. Pull the seller's certificates: GL, commercial auto, workers' comp (if employees), umbrella. Confirm coverage is in force, has been continuous (gaps in coverage are an underwriting issue for *you* later), and read the exclusions. Some pool-service policies exclude electrical work or chemical spills.
We're not lawyers, confirm specifics with licensed counsel and a commercial insurance broker in your state.