12 items you may not be allowed to bury in your backyard

When you’ve got a little land, it’s tempting to think you can handle things your own way. A hole, a shovel, and a quiet corner of the yard can feel like a practical solution. But a lot of everyday items fall under local, state, or federal regulations when it comes to disposal. Environmental rules aren’t written to make your life harder. They exist because buried materials don’t stay put. They leach, shift, and sometimes create real problems years down the line.

Before you start digging, it’s worth knowing what’s typically off-limits. Here are items you may not legally bury in your backyard, depending on where you live.

Household Trash

It might seem harmless to dig a pit and cover up old garbage, especially if you live in a rural area. But most municipalities prohibit backyard burial of household waste. Decomposing trash can attract wildlife, create odors, and contaminate soil and groundwater.

Modern landfills are engineered to contain leachate and methane. Your backyard isn’t. Even paper and food scraps can draw pests or create sinkholes as they break down. If you’re outside city limits, check county regulations before assuming you’re in the clear.

Tires

Old tires are one of the most commonly regulated items when it comes to disposal. Many states specifically prohibit burying them because they trap air, shift in the soil, and can resurface years later.

Tires also collect water if exposed, creating breeding grounds for mosquitoes. When buried, they don’t decompose and can interfere with drainage. Most states require recycling through approved facilities, and some even charge fines for illegal dumping or burial on private property.

Used Motor Oil

You might think pouring used oil into a deep hole keeps it out of sight and out of mind. In reality, it can move quickly through soil and contaminate groundwater. A single gallon of used motor oil can pollute a significant volume of water.

Federal guidelines under the Resource Conservation and Recovery Act regulate oil disposal. Many states classify improper dumping as a serious environmental violation. Auto parts stores and recycling centers often accept used oil for free, which makes backyard burial both risky and unnecessary.

Propane Tanks

Empty propane tanks feel harmless once they’re drained, but burying them can be illegal in many areas. Residual gas or pressure can remain inside, and corrosion underground can create safety issues down the road.

If a future homeowner digs in that area, a buried tank can pose a hazard. Most states require tanks to be returned to suppliers or disposed of through approved recycling programs. It’s not something you want to hide under a few feet of dirt.

Asbestos-Containing Materials

If you’re tearing out old insulation, siding, or pipe wrap from a pre-1980 structure, there’s a chance asbestos is involved. Burying it yourself is usually illegal without proper containment and documentation.

Asbestos fibers become dangerous when disturbed. Improper handling can release particles into the air or soil. Disposal typically requires sealed packaging and delivery to a designated landfill. It’s heavily regulated for good reason.

Lead-Acid Car Batteries

Car batteries contain sulfuric acid and lead, both of which are hazardous. Burying one in your yard can contaminate soil and groundwater, and in many places, it’s explicitly prohibited.

Most states have core return programs that require retailers to accept old batteries. These are recycled for the lead content. Tossing one into a hole in the ground can bring serious fines if discovered, especially if contamination spreads.

Paint and Solvents

Latex paint may be allowed to dry and go into regular trash in some areas, but burying liquid paint or solvent-based products is another matter. Many of these contain chemicals that can leach into soil.

Oil-based paints, thinners, and cleaning solvents are often classified as household hazardous waste. Counties typically host collection events or maintain drop-off sites. A buried can might rust out in a few years and release its contents underground.

Medical Waste

Used needles, expired medications, and other medical waste are tightly regulated in many states. Even on private property, burying sharps or pharmaceuticals can violate local health codes.

Needles can surface over time or injure someone digging in the yard. Medications can seep into groundwater. Pharmacies and health departments often provide safe disposal options, including sharps containers and take-back programs.

Dead Livestock

If you raise animals, you may assume burial on your land is allowed. In some rural areas, it is—but it’s often regulated by state agriculture or environmental agencies.

There may be rules about depth, distance from water sources, and reporting requirements. Large carcasses can contaminate groundwater if buried improperly. Some states require rendering, composting under specific guidelines, or approved burial methods.

Refrigerators and Freezers

Old appliances aren’t something you can typically bury and forget. Refrigerators and freezers may contain refrigerants regulated under federal environmental law.

Even if the refrigerant has been removed, the materials inside can create environmental concerns. Many jurisdictions require appliances to be recycled through approved facilities. Burying one can lead to soil contamination and future hazards if excavated.

Pesticides

Leftover pesticides, especially older formulations, can be hazardous waste. Burying them can contaminate soil and water, and many states have strict disposal laws.

Even containers with residue can be problematic. Agricultural extension offices often provide guidance or host collection programs. If you’re managing land for wildlife or crops, burying chemicals can undo years of careful stewardship.

Treated Lumber

Pressure-treated lumber, especially older boards treated with chromated copper arsenate, contains chemicals designed to resist rot and insects. Those chemicals can leach into soil over time.

Burning it is often restricted, and burial can also be prohibited depending on local rules. Construction debris typically needs to go to approved disposal sites. It may seem like harmless scrap wood, but the preservatives inside tell a different story.

Before you put a shovel in the ground, check your local and state regulations. Owning land gives you freedom, but it doesn’t put you outside environmental law. A quick call to your county office can save you fines—and protect the land you’re trying to take care of.