Colorado Hazardous Waste Regulations: Generators, Manifests, Penalties

Colorado hazardous waste regulations are enforced by the Colorado Department of Public Health and Environment (CDPHE) under the Colorado Hazardous Waste Act, with the operating rules codified at 6 CCR 1007-3.¹ They track the federal Resource Conservation and Recovery Act (RCRA) closely but layer on Colorado-specific fees, universal waste provisions, and penalties. If your business produces any chemical waste at all, whether you run a plating line, an auto shop, or a dental office, the rules apply from the moment the waste is created until it reaches a permitted disposal facility.

Is Your Waste Actually Hazardous?

Classification is the step everything else depends on. Storage limits, labeling, manifests, training obligations, fees — all of them flow from whether a waste stream is hazardous and which category it falls into. A waste qualifies in one of two ways: it appears on a list, or it exhibits a measurable dangerous characteristic.

Listed Wastes

Four lists in the regulations define wastes that are hazardous by definition. F-list wastes come from common industrial processes like degreasing or metal finishing. K-list wastes are tied to specific industries such as petroleum refining or pesticide manufacturing. The P-list covers discarded acutely hazardous commercial chemicals, and the U-list covers discarded toxic commercial chemicals. If your waste matches a list entry, it’s hazardous waste, and that’s the end of the inquiry.

Characteristic Wastes

A waste that doesn’t appear on any list is still hazardous if it shows any of these four characteristics:

Ignitability: liquids with a flash point below 140°F, solids that ignite through friction or moisture, ignitable compressed gases, and oxidizers.²
Corrosivity: aqueous liquids with a pH of 2 or lower, or 12.5 or higher.³
Reactivity: materials that are unstable, react violently with water, or generate toxic gases under normal conditions.
Toxicity: waste that leaches contaminants such as lead, mercury, arsenic, or benzene above specific limits when tested under the Toxicity Characteristic Leaching Procedure.⁴

Determining this takes either laboratory testing by a qualified lab or thorough documented knowledge of the process that produced the waste. Guessing wrong exposes you to administrative penalties of up to $15,000 per day per violation, or civil penalties of up to $25,000 per day in district court.⁵

Which Generator Category Applies to You

Colorado sorts generators into three tiers based on how much hazardous waste you produce in a calendar month. Your tier dictates almost every obligation you have.

Very Small Quantity Generator (VSQG): less than 100 kilograms (about 220 pounds) of hazardous waste and no more than 1 kilogram (about 2.2 pounds) of acutely hazardous waste per month.⁶
Small Quantity Generator (SQG): between 220 and 2,200 pounds per month.⁷
Large Quantity Generator (LQG): 2,200 pounds or more of hazardous waste, or more than 2.2 pounds of acutely hazardous waste, per month.⁷

Keep accurate monthly tallies. A single busier-than-usual month can push you into a more regulated tier with a very different set of obligations.

One-Off Surges

If a VSQG or SQG experiences a temporary spike from a cleanout, equipment failure, or one-time project, the episodic generation provision lets you keep your lower tier for one event per calendar year, provided you comply with LQG requirements during the event and meet notification and recordkeeping conditions.⁸ CDPHE needs advance notice for planned events and prompt notice for unplanned ones.

Registering With CDPHE: EPA ID Numbers and Fees

Before you can ship hazardous waste off-site, you need an EPA Identification Number. SQGs and LQGs obtain one by submitting the Subtitle C Site Identification Form (EPA Form 8700-12) to CDPHE.⁹ Federal law doesn’t require VSQGs to obtain an EPA ID, though Colorado may impose additional state requirements. SQGs must re-notify every four years.

CDPHE prefers electronic filing through the RCRAInfo/myRCRAid system, and filing electronically waives the $120 notification fee. Paper submissions require calling CDPHE at 303-692-3360 for an invoice number before payment.¹⁰

Colorado charges annual generator fees on top:

VSQGs generating 3 gallons or more per year of certain solvent wastes (F001, F002, F004, F005): $200
SQGs: $625 per year
LQGs: $3,200 per year

A VSQG that operates at SQG levels for four or more months in a year pays the SQG fee. VSQGs and SQGs that temporarily reach LQG levels for fewer than four months can keep their lower fee by notifying CDPHE.¹¹

How Long You Can Keep Waste On-Site

Exceeding your accumulation time limit is one of the most common findings during inspections, and it can effectively convert your facility into an unpermitted storage operation.

LQGs: 90 days from the date accumulation begins.¹²
SQGs: 180 days, or 270 days if the waste must be shipped more than 200 miles to the nearest treatment, storage, or disposal facility.⁷
VSQGs: no specific time limit, but total on-site accumulation cannot exceed 2,200 pounds at any time.

The clock starts the day the first drop of waste enters a container, and that date has to be visible on the container. It’s the first thing an inspector looks for.

Satellite Accumulation Areas

Generators of any size can accumulate limited quantities at or near the point of generation, such as a workbench or lab hood, without triggering the main accumulation limits. The caps are 55 gallons of non-acute hazardous waste, 1 quart of liquid acute hazardous waste, or 1 kilogram of solid acute hazardous waste per accumulation point.¹³ Once a satellite container hits that cap, you have three days to move it to a central accumulation area, and the main time limit starts running then.

Satellite containers must be in good condition, compatible with their contents, and closed except when adding or removing waste. Incompatible wastes cannot share a container.

Containers, Labels, and Weekly Inspections

Every hazardous waste container must be leak-proof, in good condition, and kept closed except during active filling or emptying. Liquid waste requires secondary containment, such as a spill pallet or bermed area, that will catch leaks before they reach soil or drains. Storage areas must be inspected weekly, and each inspection must be documented in writing with notes on any container failure or containment problems.¹⁴

Before transport, each container of 119 gallons or less must be marked with the words “HAZARDOUS WASTE — Federal Law Prohibits Improper Disposal,” along with the generator’s name, address, EPA ID number, manifest tracking number, and EPA hazardous waste number(s).¹⁵ During accumulation, containers also need the accumulation start date and the hazards of their contents. Marking is what tells emergency responders what they’re walking into.

Shipping Waste Off-Site: The Manifest System

Colorado uses cradle-to-grave tracking. You remain legally responsible for the waste until it reaches a permitted treatment, storage, and disposal facility (TSDF). Chain of custody is documented on the Uniform Hazardous Waste Manifest (EPA Form 8700-22), which travels with the shipment from your loading dock to the TSDF.¹⁶ The manifest must identify the generator, the transporter, and the destination facility’s permit number.

Only a registered hazardous waste transporter may move the waste. When the TSDF receives the shipment, it signs the manifest and returns a copy to you. Transporters must keep their copies for at least three years,¹⁷ and you should hold your manifest records for the same period as proof of proper disposal.

When a Signed Manifest Doesn’t Come Back

If the signed copy doesn’t return, you have to act. An LQG must contact the transporter or the receiving facility within 45 days and file a formal exception report within 60 days if the signed copy still hasn’t arrived. SQGs must submit a copy of the manifest, flagged as unconfirmed, within 60 days. As of December 1, 2025, EPA no longer accepts mailed paper exception reports; both LQGs and SQGs must submit them through the EPA e-Manifest system.¹⁸

Training and Emergency Planning

Training scales with your tier, and this is one of the areas regulators are least forgiving about.

Large Quantity Generators

LQG personnel must complete a training program, in a classroom, online, or on the job, that prepares them to handle their duties in compliance with the regulations. The program must be directed by someone trained in hazardous waste management and must cover emergency procedures, emergency equipment, alarm systems, and response to fires, explosions, and groundwater contamination. New employees must finish initial training within six months of hire and cannot work unsupervised until they do. Everyone takes an annual refresher.¹²

LQGs also need a written contingency plan covering fires, explosions, and unplanned releases. It must describe arrangements with local police and fire departments, list emergency coordinators with current phone numbers, inventory emergency equipment and its locations, and lay out primary and alternate evacuation routes.¹⁹

Small Quantity Generators

SQG personnel must be thoroughly familiar with proper waste handling and emergency procedures for their job. The regulations don’t require the same structured program or annual refresher that LQGs must have, but training should be repeated whenever duties or operations change. Treating an annual refresher as a standing practice is the cleanest way to avoid trouble during an inspection.

Universal Waste: The Streamlined Path

Colorado recognizes a lighter regulatory track for “universal waste,” common hazardous items that many businesses generate: batteries, certain pesticides, mercury-containing equipment such as thermostats, hazardous waste lamps (fluorescent tubes and similar mercury-containing bulbs), and aerosol cans.²⁰

Handlers don’t need a full hazardous waste manifest for these items. Instead, each item or container must be labeled (for example, “Universal Waste — Lamp(s)”), managed to prevent releases, and shipped to an authorized destination facility. Broken lamps must be cleaned up immediately and placed in a closed container. Any handler crushing lamps must use an enclosed system fitted with a mercury-capture filter. Large quantity handlers who accumulate more than 5,000 kilograms of universal waste at one time must notify CDPHE of their activities.

What Violations Cost

Colorado’s enforcement runs through three tiers, and the numbers escalate fast.

Administrative and Civil Penalties

CDPHE can impose administrative penalties of up to $15,000 per day per violation. The department can also skip the administrative route and pursue civil penalties in district court, where a judge can impose up to $25,000 per day per violation.⁵ “Per day” is the key phrase. A storage violation that continues for a month isn’t one $15,000 problem; it is potentially thirty.

Criminal Penalties

Colorado criminal enforcement distinguishes negligent from knowing conduct. A person who violates hazardous waste requirements through criminal negligence commits a misdemeanor punishable by a fine of up to $25,000 per day. A person who knowingly violates the law commits a felony carrying up to $50,000 per day in fines, up to four years of imprisonment, or both. Second convictions double the maximum penalties for both fine and imprisonment.²¹

Colorado specifically targets generators who knowingly exceed the 90-day storage limit; that violation is a misdemeanor carrying the same penalties as a criminal negligence offense. Federal RCRA criminal provisions sit on top of state law, so a single illegal disposal incident can be prosecuted at both levels at once.²² Inspectors know accumulation deadlines down to the day, and “we forgot” has never been a defense that worked well.

1
Colorado Department of Public Health and Environment. Hazardous Waste Regulations
2
eCFR. 40 CFR 261.21 – Characteristic of Ignitability
3
eCFR. 40 CFR 261.22 – Characteristic of Corrosivity
4
eCFR. 40 CFR 261.24 – Toxicity Characteristic
5
Justia. Colorado Code 25-15-309 – Administrative and Civil Penalties
6
Colorado Department of Public Health and Environment. Very Small Quantity Generator Waste Programs
7
U.S. Environmental Protection Agency. Categories of Hazardous Waste Generators
8
Cornell Law Institute. Colorado Code 6 CCR 1007-3-8.94 – Basis and Purpose – Section: Episodic Generation
9
U.S. Environmental Protection Agency. Instructions and Form for Hazardous Waste Generators, Transporters and Treatment, Storage and Disposal Facilities to Obtain an EPA Identification Number
10
Colorado Department of Public Health and Environment. Hazardous Waste Forms and Applications
11
Legal Information Institute. Colorado Code 6 CCR 1007-3-262.9 – Generator Annual Fees
12
eCFR. 40 CFR 262.17 – Conditions for Exemption for a Large Quantity Generator
13
eCFR. 40 CFR 262.15 – Satellite Accumulation
14
Legal Information Institute. Colorado Code 6 CCR 1007-3-263.12 – Transfer Facility Requirements – Section: Weekly Inspections
15
eCFR. 40 CFR 262.32 – Marking
16
U.S. Environmental Protection Agency. Uniform Hazardous Waste Manifest – Instructions, Sample Form and Continuation Sheet
17
Colorado Secretary of State. 6 CCR 1007-3 Part 263 – Transporters of Hazardous Waste
18
eCFR. 40 CFR 262.42 – Exception Reporting
19
eCFR. 40 CFR Part 262 Subpart M – Preparedness, Prevention, and Emergency Procedures for Large Quantity Generators
20
Legal Information Institute. Colorado Code 6 CCR 1007-3-8.41 – Basis and Purpose – Section: Universal Waste
21
FindLaw. Colorado Revised Statutes 25-15-310 – Criminal Penalties
22
U.S. Environmental Protection Agency. Criminal Provisions of the Resource Conservation and Recovery Act (RCRA)