Many common household items require special disposal. These products may be hazardous if used, stored, or disposed of improperly, causing fire, injuries and/or groundwater contamination. These items include used motor oil, gasoline, transmission fluid, antifreeze, oil-based paint, stain and paint remover, solvent-based cleaners, oven cleaner, pool and photo chemicals, pesticides, mothballs, batteries and compact fluorescent light bulbs. Some of these items may be accepted at the City drop-off sites, others must be taken to a hazardous waste disposal location. Please see the comprehensive list of collection guidelines for more detailed information. For additional questions about hazardous waste disposal, call MMSD at (414) 225-2066 or visit the MMSD web site.