Firework laws in Colorado allow only a narrow set of ground-based, non-explosive devices for personal use. Anything that flies into the air or explodes is illegal without a professional display permit, and the state’s dry climate means both state and local penalties can be stiffer than people expect.
What Fireworks Are Legal in Colorado
Colorado calls the legal category “permissible fireworks.” Every item on the list stays on the ground, and each has a cap on how much pyrotechnic composition it can contain:
- Cylindrical fountains: up to 75 grams in a single tube, or 200 grams for multiple tubes on a shared base
- Cone fountains: up to 50 grams per cone, or 200 grams for multiple cones on a shared base
- Wheels: up to 60 grams per driver unit, or 200 grams per complete wheel
- Ground spinners: no more than 20 grams, designed to spin on the ground rather than launch
- Illuminating torches and colored fire: up to 200 grams each
- Sparklers and dipped sticks: up to 100 grams total, with chlorate or perchlorate composition capped at 5 grams
- Snakes, trick noise makers, and similar novelties: no more than 50 milligrams of explosive composition
All permissible fireworks must comply with federal Consumer Product Safety Commission standards and qualify as consumer fireworks under federal transportation rules.1Justia Law. Colorado Revised Statutes Section 24-33.5-2001 – Definitions
A few items fall outside the fireworks definition entirely: toy caps and party poppers with very small amounts of pyrotechnic material, highway flares, marine distress signals, and small model rocket engines. You don’t need to worry about the fireworks statutes when using those.
What’s Illegal for Personal Use
If it explodes or leaves the ground, you can’t legally use it in Colorado. That includes firecrackers, bottle rockets, Roman candles, aerial shells, mortars, and missiles.2Front Range Fire Rescue. Fireworks Information The neighborhood aerial show most people picture on the Fourth of July is almost entirely built out of devices Colorado prohibits. The only legal route to using them is a professional display permit issued by a local governing body, which requires certified operators and adherence to NFPA 1123 or NFPA 1126 safety standards.3COCODE. Colorado Revised Statutes 24-33.5-2003 – Permits – Exceptions to Permit Requirements
Age Restrictions
No one under 16 may purchase fireworks in Colorado, including sparklers and fountains. Minors under 16 can possess and use permissible fireworks only under direct adult supervision, which means a responsible adult present and close enough to intervene.4Legal Information Institute. 8 CCR 1507-12-2.3 – Purchase, Possession or Discharge
Where and When You Can Actually Use Them
State law is the floor. Cities and counties can and do restrict fireworks further, and in many parts of Colorado they’ve banned even permissible items outright.
Aurora keeps a Stage 1 burn restriction in place all year, which restricts the use of all fireworks, and the fire chief can impose a total ban when conditions warrant.5City of Aurora. City of Aurora Fireworks Westminster permits legal fireworks only from midnight on July 3rd through noon on July 5th. Commerce City generally bans all fireworks but allows some personal fireworks on July 3rd, July 4th, and New Year’s Eve. Because these windows shift year to year with drought conditions, a call to your local fire department before you buy anything is the practical step.
Statewide Emergency Bans
When fire conditions get extreme, the governor can issue a proclamation closing state lands to open burning, which includes all fireworks. The governor decides when the emergency ends.6Justia Law. Colorado Revised Statutes Section 24-33.5-1225 Statewide executive orders banning open burning and fireworks went into effect in 2002 and 2012 during severe wildfire seasons. These bans don’t override local ordinances that are already more restrictive.7City of Fountain. Firework Information – Section: Executive Orders
Federal Lands
Fireworks are prohibited year-round on Bureau of Land Management public lands in Colorado, regardless of local rules or whether the device is otherwise legal. Violators face civil liability and criminal prosecution, and the responsible party is on the hook for the full cost of fire suppression and property damage if a fire starts.8Bureau of Land Management. Fire Prevention Order COF02-26-01 Stage 1 Fire Restrictions
Penalties for Illegal Fireworks
Under state law, possessing or using prohibited fireworks is a petty offense. The penalty is a fine of up to $300 and up to 10 days in jail. That’s the state floor. Repeat violations, large quantities, or incidents involving property damage or injury raise the stakes considerably.
The local number is often the one that matters. Greeley, for example, raised its fine for illegal fireworks possession or use to $1,000, with the possibility of jail time on top of that.9Greeley Tribune. Illegal Fireworks Use, Possession in Greeley Now Comes With $1K Fine, Possible Jail Time Check your city and county ordinances before assuming the $300 state cap is what you’d be facing.
Bringing Fireworks From Wyoming or Other States
Neighboring states sell fireworks Colorado prohibits, and it’s tempting to load up a trunk in Cheyenne and drive south. Doing so is a federal crime. Under 18 U.S.C. § 836, transporting fireworks into any state where those fireworks are prohibited carries a fine and up to one year in federal prison.10Office of the Law Revision Counsel. 18 U.S. Code 836 – Transportation of Fireworks Into State Prohibiting Sale or Use
The statute reaches anyone who transports, delivers for transportation, or even attempts to transport fireworks knowing they’ll be used in violation of the destination state’s laws. Narrow exceptions exist for common carriers in continuous interstate transit and for fireworks headed to a federal agency, but neither helps a personal buyer.10Office of the Law Revision Counsel. 18 U.S. Code 836 – Transportation of Fireworks Into State Prohibiting Sale or Use Colorado law adds a separate prohibition on importing fireworks without a state license; only licensed display retailers, wholesalers, and exporters may legally bring fireworks into the state.
Civil Liability and Insurance
The criminal fine is often the smallest number in play. If your fireworks start a fire, injure someone, or damage a neighbor’s property, you’re civilly liable for the full cost. On federal lands, that includes suppression costs, which can run into six figures.8Bureau of Land Management. Fire Prevention Order COF02-26-01 Stage 1 Fire Restrictions
Homeowner’s insurance is the next problem. Most policies exclude damage arising from illegal activity. If the fireworks that burned down your neighbor’s fence were prohibited under Colorado law, your insurer will likely deny the claim and leave you personally responsible. Read your policy’s specific exclusions, but the general pattern is that illegal fireworks use puts you on your own financially.
Hosting a gathering adds another layer. A property owner who allows fireworks use, fails to supervise children, or doesn’t intervene when things get dangerous can be held liable for resulting injuries. Even if a guest brought their own devices, a host who knew and let it continue shares responsibility. Using illegal fireworks raises the standard of negligence, making it easier for an injured person to win a suit.
Disposing of Used Fireworks Safely
Spent fireworks stay a fire hazard. A fountain that looks finished can reignite hours later in a trash can. Soak used fireworks completely in water for at least 15 minutes (overnight is better), then double-bag them before placing them in household trash. Duds get the same treatment, since they can still go off unexpectedly. Some Colorado municipalities set up designated collection points around the Fourth of July, so check whether your city offers that option before dumping everything in the bin.