A few things need to be clarified about the "departments operating" categories assigned to articles.
First, these categories are for apparatus bodies only, not chassis. So if a department has an HME or Spartan truck, the category is only assigned if the bodies were made by HME Ahrens-Fox and Spartan ER / Crimson respectively.
Second, a department can be a current operator or a former operator, not both. For instance, if a department is currently operating a Pierce truck and has also operated Pierce trucks in the past that have since been retired, it would only have one related category - departments operating Pierce apparatus.
There are a number of articles that have or may have these errors - I will try to isolate and fix them over the coming weeks. ~~~~