How to prepare Household Hazardous Waste (HHW) for safe drop-off

Properly packaging and labeling your Household Hazardous Waste (HHW) is essential for safety at every step - from storage at home to transportation and drop-off. When items are not secured or clearly marked, they can leak, cause dangerous chemical reactions or release harmful fumes. This puts you, your family, collection workers and the environment at risk. By following a few simple guidelines, you help prevent accidents and make sure your HHW is handled safely and efficiently.

To identify HHW, look for words and symbols like hazardous, flammable, toxic, corrosive, or poisonous. Labels with danger, warning, or caution also indicate hazardous materials. Many products also have a Safety Data Sheet (SDS), which provides key details such as usage instructions, handling, and storage. Click to learn more.

Download SDS example

Packaging and storing HHW

Proper packaging, labeling and storage of household hazardous waste are essential to prevent spills, toxic fumes and dangerous chemical reactions.

Safe Storage Guidelines

  • Always read and follow label instructions and watch for hazard symbols.
  • Keep materials in their original packaging, as it contains important safety information.
  • Never mix different chemicals in one container as this can lead to hazardous reactions.
  • Store HHW securely, out of reach of children, pets, and away from food and drinks.
  • Separate incompatible chemicals (e.g., bleach and ammonia) to prevent toxic reactions.
  • Regularly inspect containers for leaks, rust, or damage. Replace or repackage if needed.

Examples of HHW symbols

Corrosive
Flammable
Poisonous
Explosive

Storage tips by type

  • Flammable liquids (e.g., gasoline, paint thinner): Store in a metal cabinet or a cool, well-ventilated area, away from heat sources and open flames.
  • Corrosive materials (e.g., drain cleaner, bleach): Store upright in trays or bins to contain leaks and keep them away from reactive substances.
  • General HHW items (e.g., batteries, pesticides): Store securely in a locked cabinet or sealed, clearly labeled bin.

If you're unsure how to store a product, ask the retailer for its Safety Data Sheet (SDS) or check the manufacturer’s website for guidance.

Person holding and reading label on a chemical bottle, with other chemical bottles in a green bucket.
Person putting chemical bottle into a storage bucket with other chemicals.
Bucket with chemicals for storing.

Storing HHW without the original container

Original containers are ideal for safe storage and disposal, but if they’re not available, use a sturdy, leak-proof container with a secure, tight-fitting lid - never use plastic containers like pop bottles or milk jugs. Ensure the container is compatible with the type of waste, and clearly label it with the product name and contents, relevant hazard symbols (e.g., flammable, toxic), the date of transfer and any required handling precautions. 

Safely putting motor oil into a glass jar.
Place your leftover chemicals in a sealed, spill-proof container.
Safely putting the lid on a jar with motor oil.
Make sure the lid is on tight.
Safely transporting motor oil in a jar.
Label the container clearly.

Transporting HHW

When bringing HHW to a drop-off location, follow these safety tips to prevent spills and exposure:

  • Keep containers upright, sealed and clearly labeled.
  • Never mix different chemicals in the same container.
  • Place items in a sturdy box or bin to prevent tipping or rolling.
  • Transport HHW in the trunk or a separate cargo area, away from passengers and pets. Do not transport HHW in the passenger area of your vehicle.
  • Wear gloves when handling hazardous materials to protect your skin.
Three bins marked sprays, paint and chemicals in the back of a car for transportation.
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