Hazardous waste is materials that poses substantial or potential threat to public health or the environment. Due to its potential harm to humans and the environment, all hazardous waste must be separated from regular household garbage. ​

Household hazardous waste (HHW) is the unused or leftover portion of any hazardous chemicals or materials. Any leftover household product that is labeled with DANGER, WARNING, TOXIC, CAUTION, POISON, FLAMMABLE, CORROSIVE, or REACTIVE is considered a household hazardous waste. ​

Examples of hazardous waste are:

• Batteries (lead and household)
• Chemicals from photography studios
• Dry cleaning chemicals
• Used motor oil
• X-ray machinery
• Aerosol Cans
• Automotive Fluids
• Batteries (auto, household, & rechargeable)
• Computer, Monitors and Televisions
• Fertilizers
• Fluorescent Lamps - including tubes and Compact Fluorescent Lamps (CFLs)
• Household Cleaners
• Mercury Items (including thermometers & thermostats)
• Motor Oil & Oil Filters
• Paint & Stains (latex & oil)
• Pesticides
• Pool Chemicals
• Propane
• Solvent