We have fire extinguishers that we fill with water and then pump air into that can be refilled, but anything else has to go to a private company. This is partially to do with paperwork, but mostly that we don't really use dry chem with any regularity so there is no reason to have the equipment to refill them (the only one's I can think of are around the station to meet building codes or in the ambulances to meet state requirements). It would be a waste of taxpayer money to buy equipment we don't need or use.