Say which side of the county line you cross before you say anything else
A visitor in this metro is asking a jurisdiction question first, and a homepage that answers it in the first screen keeps people who would otherwise bounce.
The City of St. Louis is an independent city, separate from St. Louis County. Locals do not treat them as one place, and a plumbing site that says St. Louis and nothing more reads as either an out of town lead broker or a shop that has not thought about it.
Name the places. City neighborhoods you cover, the county municipalities you dispatch to, whether you go west into St. Charles County, whether you cross the Mississippi into the Metro East. Put it in the first screen in plain text, not on a service area page three clicks down.
A coverage map graphic is not a substitute. Many of your visitors are on a phone in a poorly lit basement and will not pinch and zoom to find out if you come to Florissant.
The honesty cuts both ways. Naming where you do not go is worth as much as naming where you do, because every refused call costs a dispatcher time and sometimes costs you a review.