Items Illegal to Throw Away in Colorado

Most people don’t think twice about what goes in the trash. You toss it in the bin, roll it to the curb, and forget about it. But in Colorado, throwing away certain items isn’t just irresponsible — it’s actually illegal. And if you get caught, you could be looking at fines ranging from $150 to $999 in the City of Denver alone.

Colorado has some of the most specific disposal laws in the country, and they exist for good reason. Many common household items contain toxic chemicals, heavy metals, or ozone-depleting substances that contaminate groundwater, pollute the air, and damage landfills when they’re thrown away improperly.

So what exactly can’t you throw in the trash in Colorado? And more importantly — what are you supposed to do with this stuff instead? Let’s break it down, item by item.

Electronics — The Colorado Electronic Recycling Jobs Act

Colorado passed the Electronic Recycling Jobs Act back in 2013, and it’s been in effect ever since. Under this law, it is illegal to throw covered electronic devices into the trash. That includes:

Computers (desktops and laptops)
Monitors and screens
Televisions
Printers
Tablets and keyboards

Why it’s banned: Electronics contain lead, mercury, cadmium, and other heavy metals. When they end up in a landfill, those toxins leach into the soil and eventually make their way into groundwater. One old CRT monitor can contain up to 8 pounds of lead.

Where to Recycle Electronics in Denver

Denver Drop-Off Events: The City of Denver hosts periodic electronics recycling events. Check denvergov.org for the latest schedule.
Blue Star Recyclers: A Colorado-based nonprofit that accepts most electronics and provides jobs for people with disabilities.
Best Buy: Accepts a wide range of small electronics for recycling at no charge.
Junk Same Day: We pick up e-waste directly from your home and make sure it gets to a licensed recycler — no drop-off required. For a complete guide, see Where to Recycle Electronics in Denver. Schedule a same-day pickup and we’ll handle the rest.

Tires

You can’t throw tires in the regular trash in Colorado. Period. Waste haulers won’t take them curbside, and landfills won’t accept them either.

Why it’s banned: Tires don’t break down in landfills. They trap methane gas, which can cause them to “bubble up” to the surface over time, damaging landfill caps. Stockpiled tires also create breeding grounds for mosquitoes and pose a serious fire hazard — tire fires are notoriously difficult to extinguish and release toxic smoke.

Where to Dispose of Tires in Denver

Tire retailers: Most tire shops in Denver will accept old tires when you purchase new ones. Some charge a small disposal fee (usually $3–$5 per tire).
Denver Arapahoe Disposal Site (DADS): Accepts tires for a fee.
Junk Same Day: Got a pile of old tires in the garage? We’ll come pick them up. Just give us a call or text us photos for a free quote.

Paint — The PaintCare Program

Colorado is a PaintCare state, which means leftover paint has its own dedicated recycling program funded by a small fee included in the purchase price of paint.

You cannot throw liquid paint — latex or oil-based — in the trash. Dried-out latex paint (completely hardite and solidite) is technically acceptable in small quantities, but liquid paint of any kind is banned from landfills.

Why it’s banned: Oil-based paints are classified as hazardous waste due to their chemical solvents. Even latex paint can contaminate water sources when it enters landfills in liquid form. This is especially relevant if you’ve just finished a remodel — see our guide on cleaning up after a DIY renovation in Denver for more on handling leftover paint and construction waste.

Where to Dispose of Paint in Denver

PaintCare drop-off sites: There are dozens of PaintCare locations across the Denver metro area, including many Sherwin-Williams and other paint stores. Find the closest one at paintcare.org.
Denver Household Hazardous Waste Facility: Located at 7263 E. 36th Ave., this facility accepts paint along with other hazardous materials. Open select days — check their schedule before you go.
Junk Same Day: We can haul away old paint cans as part of a garage or basement cleanout. We sort everything and make sure paint goes where it’s supposed to.

Batteries

This one catches a lot of people off guard. Single-use alkaline batteries (your standard AA, AAA, C, D) can technically go in the trash in Colorado, though recycling is strongly encouraged. However, rechargeable batteries, lithium-ion batteries, and car batteries are illegal to throw away.

Why it’s banned: Rechargeable and lithium-ion batteries contain heavy metals like nickel, cobalt, and lithium. When damaged in a landfill, they can spark fires — and lithium-ion battery fires are incredibly dangerous. Car batteries contain sulfuric acid and lead, both of which are toxic.

Where to Dispose of Batteries in Denver

Call2Recycle drop-off locations: Many Home Depot, Lowe’s, and Batteries Plus locations accept rechargeable batteries through the Call2Recycle program.
Auto parts stores: AutoZone, O’Reilly, and NAPA all accept car batteries — often for free and sometimes with a core credit.
Denver Household Hazardous Waste Facility: Accepts all types of batteries.

Appliances with Refrigerants (Freon)

Refrigerators, freezers, air conditioning units, dehumidifiers, and any appliance that uses refrigerant gases (like Freon) cannot be thrown away without proper refrigerant recovery. This is regulated at both the state and federal level under the Clean Air Act.

Why it’s banned: Refrigerants are ozone-depleting substances. Releasing them into the atmosphere contributes to the destruction of the ozone layer and accelerates climate change. The EPA takes this seriously — improper venting of refrigerants can result in federal fines up to $44,539 per day per violation.

Where to Dispose of Appliances in Denver

Denver DADS facility: Accepts appliances but requires that refrigerants be properly recovered first.
Retailer take-back programs: If you’re buying a new appliance, many retailers (Home Depot, Lowe’s, etc.) will haul away the old one.
Junk Same Day: We handle appliance removal the right way. We work with certified technicians to ensure refrigerants are recovered before the unit is recycled or disposed of. No hassle, no risk to you.

For a deeper dive on getting rid of old refrigerators, washers, dryers, and more, check out our full guide: How to Dispose of Old Appliances in Denver.

Mattresses

While mattresses are not specifically banned from landfills under Colorado state law, Denver and several Front Range municipalities have restrictions on how mattresses can be disposed of. You cannot leave a mattress curbside for regular trash pickup in Denver — it must be taken to an approved facility or hauled by a licensed service. (Denver does offer a large item pickup program, but it only runs every 9 weeks and has strict limits.)

Why the restrictions: Mattresses are enormous. A single king-size mattress can take up 40 cubic feet of landfill space and takes decades to decompose. They also jam up processing equipment at waste facilities. Most of the materials inside a mattress — steel springs, foam, cotton, wood — are actually recyclable.

Where to Dispose of Mattresses in Denver

Denver DADS: Accepts mattresses for a fee.
Spring Back Colorado: A nonprofit mattress recycling program that disassembles mattresses and recycles the components.
Junk Same Day: Mattress removal is one of our most popular services. We’ll pick it up from whatever room it’s in — even upstairs — and make sure it gets recycled when possible. Book a pickup here.

Motor Oil and Automotive Fluids

Used motor oil, transmission fluid, brake fluid, and antifreeze are all classified as hazardous waste in Colorado. Dumping them in the trash, pouring them down a drain, or dumping them on the ground is illegal.

Why it’s banned: One gallon of used motor oil can contaminate up to one million gallons of water. Antifreeze is toxic to animals and children due to its sweet taste. These fluids contain heavy metals and toxic compounds that cause serious environmental damage.

Where to Dispose of Motor Oil in Denver

Auto parts stores: Most AutoZone, O’Reilly, and NAPA locations accept used motor oil for free (up to 5 gallons at a time).
Denver Household Hazardous Waste Facility: Accepts all automotive fluids.
Jiffy Lube and other service centers: Many will accept used oil even if you didn’t get your oil changed there.

Hazardous Chemicals and Household Cleaners

This is a broad category, but the rule is straightforward: if a product label says “danger,” “warning,” “caution,” “toxic,” “flammable,” “corrosive,” or “reactive,” it probably can’t go in your regular trash. Common examples include:

Pesticides and herbicides
Pool chemicals
Solvents and paint thinners
Drain cleaners
Fluorescent light bulbs and CFLs (contain mercury)
Propane tanks
Fire extinguishers

Why it’s banned: These chemicals can react with other waste, cause fires or explosions in garbage trucks, and release toxic fumes. In landfills, they leach into groundwater and create long-term contamination problems.

Where to Dispose of Hazardous Chemicals in Denver

Denver Household Hazardous Waste Facility: This is your go-to. Located at 7263 E. 36th Ave., Denver, CO 80238. They accept a wide range of household hazardous materials at no charge for Denver residents. Check hours and accepted items before heading over.
Rooney Road Recycling Center (Jefferson County): If you’re in Lakewood, Golden, or the west Denver suburbs, this facility accepts hazardous waste from county residents.

What Happens If You Get Caught?

Denver takes illegal dumping seriously. Fines for improper disposal in the City and County of Denver range from $150 to $999 per violation, depending on the material and circumstances. And that’s just the municipal level — if you’re caught improperly disposing of federally regulated materials like refrigerants or large quantities of hazardous waste, the fines can escalate into the thousands.

Beyond fines, illegal dumping can result in mandatory cleanup costs charged back to you, and in some cases, criminal charges. It’s just not worth the risk.

The Easiest Way to Handle All of This? Let Us Do It.

Look, we get it. Figuring out what can and can’t go in the trash — and then finding the right drop-off location for each item — is a headache. That’s exactly why Junk Same Day exists.

We’re a Denver-based junk removal company, and we deal with all of these items regularly. When you call us, we sort everything, ensure items are disposed of legally, and recycle or donate whatever we can. You don’t have to worry about which facility accepts what, whether you need an appointment, or if your car can even fit a refrigerator.

Here’s how it works:

Call us at (303) 324-6014 or text us photos of what you need removed.
We’ll give you a free, no-obligation quote — usually within minutes.
We show up (often the same day), load everything up, and handle all the sorting and disposal.

It really is that simple. No trips to the hazardous waste facility. No figuring out PaintCare drop-off schedules. No worrying about fines.

Call (303) 324-6014 or text us photos today for a free quote.

Items That Are Illegal to Throw Away in Colorado (and How to Dispose of Them)