Hazardous waste generator status is the category a site falls into under the Resource Conservation and Recovery Act (RCRA), based on how much hazardous waste it generates in a calendar month. The U.S. Environmental Protection Agency (EPA) uses three categories: very small quantity generator (VSQG), small quantity generator (SQG) and large quantity generator (LQG). The category decides which accumulation limits, time limits, paperwork and training rules apply.
Generator status matters because it can change from month to month. A site that usually qualifies as a small generator can become a large generator after a cleanout or a spill, and must then meet stricter rules for that month's waste.
What Is Hazardous Waste Generator Status?
EPA's generator rules are in 40 CFR Part 262, with the category definitions in 40 CFR 262.13 and 260.10. Status is set separately for each site, identified by its EPA ID number, and is based on the total weight of hazardous waste generated at that site in a calendar month, not the amount shipped off. Wastes are split into two groups for counting:
- Non-acute hazardous waste: most listed and characteristic wastes, such as spent solvents, ignitable liquids and corrosive wastes.
- Acute hazardous waste: wastes on the P-list and certain F-listed wastes that EPA considers acutely hazardous even in small amounts, along with residues from cleaning up spills of acute waste.
Our page on RCRA hazardous waste generator requirements covers the full set of rules for each category.
The Three Generator Categories
Very Small Quantity Generator (VSQG)
A VSQG generates 100 kilograms (about 220 pounds) or less of non-acute hazardous waste per month, and no more than 1 kilogram of acute hazardous waste and 100 kilograms of acute spill cleanup residue. VSQGs must identify their waste, never accumulate more than 1,000 kilograms of non-acute waste on site, and send waste to an appropriate facility. If accumulated amounts exceed the limits, the VSQG becomes subject to the stricter requirements of a larger generator.
Small Quantity Generator (SQG)
An SQG generates more than 100 but less than 1,000 kilograms of non-acute hazardous waste per month, with acute waste within the VSQG limits. An SQG may accumulate up to 6,000 kilograms on site for up to 180 days, or up to 270 days if the waste must travel 200 miles or more to a treatment, storage or disposal facility. SQGs need an EPA ID number, must use the hazardous waste manifest, must meet basic container, labeling, training and emergency preparedness rules, and must re-notify EPA or their state of their status every four years.
Large Quantity Generator (LQG)
An LQG generates 1,000 kilograms (about 2,200 pounds) or more of non-acute hazardous waste per month, or more than 1 kilogram of acute hazardous waste, or more than 100 kilograms of acute spill residue. LQGs may accumulate waste for up to 90 days with no quantity limit, but must meet the most detailed requirements, including a written contingency plan, formal personnel training, weekly inspections of central accumulation areas, closure requirements and a biennial report due by March 1 of each even-numbered year.
Counting Waste Correctly
Counting is where many sites go wrong. Under 262.13, a site counts all hazardous waste it generates in the month, with some exclusions. Examples of waste that is generally not counted include:
- Waste managed under the universal waste rules, such as batteries, lamps and certain pesticides.
- Used oil managed under the used oil management standards.
- Waste that is exempt or excluded from regulation, such as certain recycled materials.
- Waste already counted once that is removed from on-site accumulation.
Mixing hazardous waste with non-hazardous waste can make the whole mixture hazardous and raise a site's monthly total. Each state with an authorized RCRA program can have rules that are more stringent than the federal rules, including different categories, thresholds or names, so always confirm the requirements in your state.
Episodic Generation
EPA's episodic generation rules in 40 CFR Part 262, Subpart L let VSQGs and SQGs handle a short-term increase in waste, such as a tank cleanout, a spill or a cleanup project, without changing their category. Key points:
- A generator may have one episodic event per calendar year, and may petition for a second event under certain conditions.
- Each event may last up to 60 days.
- The generator must notify EPA or the state at least 30 days before a planned event, or within 72 hours after an unplanned event.
- Episodic waste must be managed under specific container and labeling rules, shipped with a manifest and kept separate from routine waste.
Episodic generation rules are optional for authorized states, so check whether your state has adopted them.
How to Determine Your Generator Status Step by Step
- List your waste streams. Identify each process that produces waste and determine which wastes are hazardous through a hazardous waste determination.
- Separate acute and non-acute waste. Check whether any waste is on the P-list or is otherwise acute hazardous waste.
- Weigh or estimate monthly quantities. Record the amount of each hazardous waste generated each calendar month.
- Apply the exclusions. Remove waste that does not count under 262.13, such as properly managed universal waste and used oil.
- Compare to the thresholds. Determine your category for the month for both non-acute and acute waste, and use the stricter result.
- Check state rules. Confirm whether your state uses different categories or thresholds.
- Notify and update. Obtain an EPA ID number if needed and notify the agency when your status changes, using the required notification form.
- Review monthly. Re-check status every month, especially during cleanouts, spills and production changes.
Common Mistakes to Avoid
- Counting only the waste shipped off site instead of the waste generated each month.
- Forgetting that acute hazardous waste has a much lower threshold of 1 kilogram.
- Exceeding accumulation time limits because pickups are not scheduled in time.
- Failing to notify the agency when a site's status changes.
- Assuming federal thresholds apply in a state with stricter rules.
- Missing the SQG re-notification or the LQG biennial report.
How SMS360 Helps
SMS360's Compliance Management module helps teams track recurring obligations such as accumulation time limits, re-notifications and biennial reports with reminders and records. Audits & Inspections supports checklists for weekly accumulation area inspections, and Training Management keeps records of hazardous waste training.
Frequently Asked Questions
Can my generator status change from month to month?
Yes. Status is based on the waste generated in each calendar month. A site must follow the requirements for the category it falls into in that month, which is why episodic generation rules exist for short-term increases.
What is the difference between an SQG and an LQG?
An SQG generates more than 100 but less than 1,000 kilograms of non-acute hazardous waste per month and may accumulate waste up to 180 days (or 270 days in some cases). An LQG generates 1,000 kilograms or more, or more than 1 kilogram of acute waste, and may accumulate waste for up to 90 days with more detailed planning, training and reporting rules.
Do I count universal waste toward my generator status?
No, universal waste managed under the universal waste rules is not counted. Waste that is not properly managed as universal waste may need to be counted as hazardous waste.
How do I find out my state's rules?
Contact your state environmental agency or check its website. EPA's hazardous waste generator pages also link to state program information.
