University of Missouri Extension

WM6004, Reviewed October 1993

Managing Household Hazardous Waste

Editor's note
The Missouri Poison Center, formerly Regional Poison Control Center, name and phone number were updated on 1/23/15.

Marie Steinwachs
Office of Waste Management

Almost every home contains hazardous products. They are used in cleaning, home improvement projects, automobile maintenance, lawn and garden care, and a variety of other tasks. In order to protect our health and environment, we must know how to properly use, store and dispose of these products.

The dangers of household hazardous products and wastes

Look in any storage cabinet in your home. Do you see products such as paint, paint thinner, pesticides, fertilizers, gasoline, windshield wiper fluid, antifreeze, motor oil, brake fluid, adhesives, batteries, furniture polish, drain opener, and oven cleaner? These products are all hazardous because they contain chemicals that are

Though usually safe when used according to label directions, these products can become dangerous when people are unaware, or forget, that they are handling hazardous products.

Each year, thousands of people are injured by products in their homes. Accidental poisoning can happen if a product is left within reach of a small child. It can also occur when food, drink, or cigarettes are used while handling hazardous products. Many products have fumes or vapors that can irritate lungs. Hazardous products have caused severe burns, illness, blindness, and even death.

When hazardous household products are no longer usable or wanted, they become household hazardous wastes. Household hazardous wastes make up only a small percentage of household waste, but they are a serious problem.

When disposed of improperly, they pose a threat to sanitation workers and the environment. Household hazardous wastes discarded in the trash may ignite or explode in the collection truck. Trash haulers have been injured from fumes and splashing chemicals. In the landfill, these wastes can leach into surface water and groundwater — the sources for our drinking water.

Disposal of household hazardous wastes down the drain can also pollute drinking water.

In septic systems, hazardous wastes can kill the organisms that make the system work. This may cause untreated wastes to drain into the soil and eventually seep into the groundwater.

Sewage treatment plants have been damaged by household hazardous wastes, resulting in the release of raw sewage and chemicals into streams. Storm drains, which are often used improperly for dumping, are a direct route to nearby waterways. Anything that is poured on the ground may spread or runoff the next time it rains.

Because of the dangers they pose, household hazardous products require special handling and disposal. Our health and environment are at stake, so it is important that each of us take responsibility for the products we use.

What you should do

What you should not do

Store products safely

Household hazardous waste collections

Household hazardous waste collection programs will become more available in Missouri as the Missouri Solid Waste Management Law goes into effect.

The law allows the formation of solid waste districts across the state. Each district must prepare a solid waste management plan. One component of the plan is to minimize and separate household hazardous wastes from the solid waste stream.

The Missouri Hazardous Waste Law also prohibits small quantities of hazardous wastes from sanitary landfills after Jan. 1, 1994. Contact your local elected officials to find out what type of household hazardous waste management program is being planned for your area.

How to read this chart

This chart contains disposal recommendations for many common household hazardous products. Always remember, the best disposal option for most hazardous products is not to dispose of them at all! Avoid buying hazardous products. If you must use them, use the products up, share them with a friend or neighbor, or find a business or organization that can use the products.

Among the items that should not he shared are banned or restricted pesticides, prescription medicines, syringes, and products that are not in original containers or whose labels are not readable.

This chart should be used only as a guideline. Contact your local officials to determine what disposal options exist in your area.


Hazardous properties may vary depending on the product's ingredients. Refer to the product label for specific product hazards.

Products are considered hazardous if they contain chemicals with one or more of the following properties:

Disposal method

Reuse means to use the product again. Household solvents, such as paint thinner and paint brush cleaner, can be used over and over. Let the used solvent sit undisturbed in a sealed container until the paint particles settle to the bottom. Carefully pour off the clean solvent and use it again.

Since these solvents are flammable, this activity should be done outdoors or with plenty of fresh air and adequate ventilation, and away from sources of heat, spark, or flame.

The sludge that remains after pouring off the clean solvent should be kept in the sealed container and saved for a household hazardous waste collection, or may be able to go to the landfill if it is completely dry (check with your local solid waste officials).

Triple-rinse container is the prescribed treatment method for empty pesticide containers. To triple-rinse, fill the container 1/4 full with water (or the solvent recommended on the product label), close it tightly, and shake or invert so the rinse reaches all inside surfaces. Repeat this procedure two more times. Rinse water should be used to make up the pesticide mixture or applied to the area you are treating following the same precautions used with the full-strength pesticide. Plastic containers should be punctured to prevent reuse. Discard the rinsed container with your trash, or see if the local recycling center will accept triple-rinsed glass or plastic containers.

Do not triple-rinse pesticide containers in a household sink, or outside near drinking water wellheads. If you cannot reuse the rinse water, save unrinsed containers for a household hazardous waste collection.

Recycle is the preferred option for any household hazardous product that can be recycled. Contact your local solid waste officials for recycling locations in your area. Try contacting jewelers or hearing aid service stores to see if they will accept button batteries for recycling. Automotive service centers may accept used motor oil, auto batteries, antifreeze, kerosene, and transmission fluid. Theater and art groups, or housing "fix-up" organizations may be happy to receive leftover paint.

Save for collection indicates those products that should be saved for a household hazardous waste collection. Contact your local solid waste officials to find out when a collection may be held in your area. If you must wait for a collection, store products safely in their original containers with the labels intact.

Flush down drain indicates that a product can be poured down the drain with plenty of water. Contact your wastewater officials before pouring to determine if this recommendation is suitable in your area. If you have a septic tank, additional caution should be taken. Read the product label to determine whether the product might damage your plumbing or your septic system. If you are uncertain, see if the local wastewater plant will accept the product, or save it for a household hazardous waste collection. Never mix wastes while pouring them down the drain. Always pour small amounts at a time to avoid splashing, and flush with plenty of water.

Put in trash indicates that a product is suitable for landfill disposal. Generally speaking, empty containers can be thrown away. Liquids should never be disposed of in the trash. Some products are acceptable for landfill disposal if they are hardened or dried up. Contact your local solid waste officials before throwing any hazardous product away.

For more information

Product Properties Disposal method
Automotive products
Antifreeze Toxic Recycle or contact your local wastewater treatment plant to see if you can flush down drain.
Auto battery Corrosive, toxic Recycle.
Brake fluid Toxic Save for collection.
Car wax, polish Corrosive, flammable, toxic Save for collection; place in trash only if hardened.
Degreaser Flammable, toxic Save for collection.
Diesel fuel Flammable, toxic Recycle or save for collection.
Gasoline Flammable, toxic Save for collection. Use approved safety container; keep away from flame, spark and heat.
Kerosene Flammable, toxic Recycle or save for collection.
Motor oil Toxic Recycle. Do not mix with anything else.
Transmission fluid Flammable, toxic Recycle or save for collection.
Windshield wiper fluid Flammable, toxic Save for collection.
Home improvement products
Adhesive and glue (solvent-based) Flammable, toxic Save for collection; place in trash only if hardened.
Paint brush cleaner (solvent-based) Flammable, toxic Reuse, or save for collection.
Paint — latex (water-based) Toxic Save for collection; place in trash only if hardened. Check with local officials.
Paint — oil (solvent-based) Flammable, toxic Save for collection; place in trash only if hardened and has no heavy metals. Check with local officials.
Paint thinner Flammable, toxic Reuse, or save for collection.
Stain and varnish Flammable, toxic Save for collection.
Wood preservative Flammable, toxic Save for collection.
Ammonia-based Corrosive, toxic Flush down drain.
Bleach-based Corrosive, toxic Flush down drain.
Disinfectant Corrosive, toxic Flush down drain or save for collection.
Drain cleaner Corrosive, reactive, toxic Flush down drain or save for collection.
Floor wax/stripper Flammable, toxic Save for collection.
Furniture polish Flammable, toxic Save for collection.
Metal cleaner Corrosive, flammable, toxic Save for collection.
Oven cleaner Corrosive, toxic Save for collection.
Spot remover Corrosive, flammable, toxic Save for collection.
Toilet bowl cleaner Corrosive, toxic Flush down drain.
Window cleaner Toxic Flush down drain.
Container (empty) Toxic Triple-rinse.
Fertilizer (with pesticide) Corrosive, toxic Save for collection.
Flea collar and spray Toxic Put in trash if used up, or save for collection.
Fungus-control chemicals Toxic Save for collection.
Insect-control chemicals Toxic Save for collection.
Moth balls Toxic Save for collection.
Rat and mouse poison Toxic Save for collection.
Weed and brush killers Toxic Save for collection.
Personal care products
Aftershaves and perfumes Flammable, toxic Flush down drain.
Hair permanent lotions Toxic Flush down drain.
Nail polish Flammable, toxic Save for collection; place in trash only if hardened.
Nail polish remover Flammable, toxic Save for collection.
Prescription medicines Toxic Save all prescription medications for a collection day.
Syringes Can transmit diseases or cause puncture wounds Place in trash Store in rigid, puncture-resistant leak-proof container. Seal prior to disposal.
Aerosol can (empty) Explosive if heated, flammable, toxic Place in trash.
Air fresheners Flammable, toxic Save for collection, or place in trash if used up.
Ammunition explosive Contact law enforcement officials for proper disposal in your area.
Artist and hobby paint Flammable, toxic Save for collection.
Batteries, household (alkaline, ni-cad, lithium) Corrosive, reactive, toxic Save for collection; recycle button batteries.
Fabric dye Corrosive, toxic Flush down drain if diluted; save for collection if concentrate.
Fireworks Explosive Soak in water until saturated, then put in trash.
Gas cylinder Explosive, flammable Contact local officials. Always store outdoors.
Photography chemicals (B&W) Corrosive, toxic Flush down drain if diluted and mixed; save for collection if unmixed.
Swimming pool chemicals Corrosive, explosive, toxic Save for collection or contact local wastewater treatment plant for disposal.
Smoke detector (ionizing) Radioactive Return to manufacturer.
Thermometer Toxic Save for collection.
This publication was compiled for the citizens of Missouri by the Household Hazardous Waste Project, Missouri Environmental Improvement and Energy Resources Authority, MU Extension, Missouri Department of Natural Resources and the Missouri Department of Health. This publication was developed in 1992. Disposal recommendations may change with new laws and information. Contact the above agencies if you have any questions.


WM6004 Managing Household Hazardous Waste | University of Missouri Extension

Order publications online at or call toll-free 800-292-0969.

University of Missouri Extension - print indicia