Treatment facilities included ultrafiltration, modification of plumbosolvency, disinfection and chlorination. Ozonation also produces fewer disinfection by-products than chlorination. Heat treatment can be used for disinfection and sterilization. If not properly maintained, chemical sanitation can produce high levels of disinfection byproducts. Many bottlers of spring water use UV disinfection equipment to sterilize their water. The remaining 19% of chlorine produced is used for bleaches and disinfection products. Many municipalities have moved from free chlorine to chloramine as a disinfection agent. Ozone disinfection is also energy intensive. Citations for larger area disinfection are for non-LED UV sources known as germicidal lamps. Slightly superheated steam may be used for antimicrobial disinfection of biofilms on hard surfaces. Chloroxylenol is used in hospitals and households for disinfection and sanitation. UV water treatment devices can be used for well water and surface water disinfection. Chemical oxidation is widely used for disinfection. Olympus manufactures endoscopic, ultrasound, electrocautery, endotherapy, and cleaning and disinfection equipment. It can also be used to produce ozone for water disinfection.