EPA Regulations on Refrigerant Leaks: Thresholds, Repairs, and Penalties

The EPA’s refrigerant leak regulations require owners of covered cooling equipment to calculate an annual leak rate every time refrigerant is added, repair any system whose leak rate exceeds the threshold for its equipment category within 30 days (120 days for industrial process refrigeration), verify the repair with two separate tests, and keep records of it all for at least three years. These obligations sit under Section 608 of the Clean Air Act and 40 CFR Part 82, Subpart F, with a substantially broader set of rules under the AIM Act at 40 CFR Part 84 taking effect January 1, 2026. Civil penalties now exceed $45,000 per day, per violation.

The Baseline Rule: No Knowing Venting

Before any of the leak-specific rules kick in, one prohibition applies to everyone. Anyone who maintains, services, repairs, or disposes of an appliance or industrial process refrigeration system is prohibited from knowingly releasing refrigerant into the environment.¹ This covers ozone-depleting substances like R-22 and their HFC replacements like R-410A.

A few refrigerants are exempt because they don’t threaten the ozone layer or contribute meaningfully to warming: carbon dioxide, nitrogen, water, and ammonia in commercial or industrial systems, plus certain hydrocarbons like propane (R-290) and isobutane (R-600a) in specific residential and retail food equipment.¹

Small, incidental releases during a good-faith recovery or recycling effort are treated as de minimis, but only when the technician follows applicable recovery practices, uses certified equipment, and holds proper Section 608 certification.¹ Only technicians certified under Section 608 may legally service or dispose of refrigerant-containing equipment.²

Which Systems Trigger the Leak Repair Rules

Not every appliance falls under the full leak repair program. Under Part 82, the trigger is a full charge of 50 or more pounds of regulated refrigerant.³ Smaller systems still face the venting prohibition and recovery requirements, but they escape the leak rate calculations and repair deadlines.

That changes January 1, 2026. Under the AIM Act, a second set of leak repair rules applies to appliances with a full charge of just 15 pounds or more, so long as the refrigerant contains an HFC or an HFC substitute with a global warming potential above 53.⁴ Equipment that solely contains an ozone-depleting substance stays under Part 82, and residential and light commercial air conditioning and heat pump systems remain outside Part 84’s leak repair reach.⁵

The practical effect is significant. A mid-sized commercial walk-in cooler holding 20 pounds of R-404A, previously outside the Part 82 leak repair regime, becomes subject to formal leak rate tracking and repair deadlines under Part 84.

Leak Rate Thresholds by Equipment Type

Under Part 82, covered equipment falls into three categories, each with its own maximum allowable annual leak rate:

Comfort cooling — 10%. Systems that control temperature and humidity in occupied buildings, such as office HVAC chillers and large residential complex systems.⁶
Commercial refrigeration — 20%. Retail food sector equipment, including supermarket rack systems and cold storage warehouses. The higher threshold reflects the sprawling piping networks typical of these setups.⁶
Industrial process refrigeration — 30%. Systems integrated into manufacturing or chemical production, where extreme temperatures and pressures make some loss harder to prevent.⁶

Getting the category right matters. Applying the wrong percentage can convert a compliant system into a violation on paper.

How to Calculate the Leak Rate

You must calculate the leak rate every time refrigerant is added to a covered appliance, with limited exceptions for additions made right after a retrofit or new installation.⁵ The formula is simple: divide the total refrigerant added over the previous 12 months by the system’s full charge, then express the result as a percentage.

Take a commercial refrigeration system with a 200-pound full charge. If 50 pounds have been added over the past year, the leak rate is 25%. That exceeds the 20% commercial refrigeration threshold, so the repair clock starts immediately. If your records don’t show exactly how much refrigerant was added and when, the calculation can’t be defended, and an EPA inspector won’t fill in the gaps in your favor.

Repair Deadlines Once the Threshold Is Exceeded

Once an appliance exceeds its applicable leak rate, the owner or operator has 30 days to complete all necessary repairs.⁶ The clock starts the day a technician adds refrigerant and the calculation comes back over the limit.

Industrial process refrigeration gets more room. When a repair requires shutting down the industrial process, the window extends to 120 days.⁶ Taking a chemical plant or food processing line offline for a compressor repair carries its own logistical and safety complications.

Mothballing Pauses the Clock

If you take a leaking system completely out of service by evacuating the refrigerant to at least atmospheric pressure and shutting it down, the repair and retrofit timelines are temporarily suspended. The EPA calls this “mothballing.”⁶ The clock resumes the moment refrigerant is added back and the system returns to service. Mothballing buys time; it doesn’t erase the obligation.

Extension Requests Under Part 84

For appliances covered by the newer Part 84 rules, owners who cannot finish within the 30-day or 120-day window must submit an electronic leak repair extension request. The request has to explain why more time is needed, identify the appliance and leak details, outline the repair plan, and provide an estimated completion date.⁵ If the EPA doesn’t respond within 60 days, the request is treated as approved.

Verification Tests Are Mandatory

Fixing the leak isn’t enough. Two separate verification tests are required to confirm the repair holds.⁷

Initial Verification Test

The initial test must be completed within the same 30-day or 120-day repair window. For repairs that don’t require opening or evacuating the system, the test happens after the repair but before any additional refrigerant is added. For repairs that require evacuating the appliance, the test must be done before recharging.⁷ A pressure test or vacuum hold is standard. If the test fails, additional repairs and retests are permitted within the applicable time period.

Follow-Up Verification Test

The follow-up test must be performed within 10 days of the successful initial test, or within 10 days of the appliance reaching normal operating conditions if the system was evacuated for the repair.⁸ This test evaluates the repair under real heat and pressure loads rather than static conditions. If the follow-up shows the repair didn’t hold, additional repairs and a fresh verification sequence follow, still within the applicable deadline.

The 10-day window is one of the details that catches owners off guard. Many assume the follow-up can happen whenever it’s convenient. The regulation is specific.

When Repair Isn’t the Answer: Retrofit or Retirement Plans

If a leak can’t be fixed, or if the owner decides it’s not worth repairing, a formal retrofit or retirement plan is required. The plan must be created within 30 days of discovering the leak rate exceeded the applicable threshold.⁶ The same 30-day deadline applies if the owner simply fails to take any action after discovering the exceedance.

All work described in the plan must be completed within one year of the plan’s creation date.⁵ A copy of the plan has to be kept on-site and made available to the EPA on request. Extensions beyond one year are available in limited circumstances, such as when a suitable replacement refrigerant isn’t available, when other federal or state regulations create scheduling conflicts, or when custom-built equipment has a supplier lead time exceeding 30 weeks.⁶

Ignoring a system leaking above its threshold, without either repairing it or drafting a plan, is itself a violation, and the penalty exposure grows daily.

Recordkeeping

Every service event on an appliance containing 50 or more pounds of ozone-depleting refrigerant has to be documented. The records must include the date, the type of service performed, and the quantity of refrigerant added. Technicians must give the owner an invoice reflecting the refrigerant added, plus records of any leak inspections or verification tests.⁹

Records must be kept for at least three years and available on-site for inspection. Physical logbooks or electronic files both work, so long as they can be produced on demand.¹⁰ These records are the only proof that leak rate calculations happened, that repairs were made on time, and that verification tests passed. Without them, there is no compliance case to make.

What Changes January 1, 2026

The American Innovation and Manufacturing (AIM) Act, passed in 2020, phases down HFC production and consumption by 85% by 2036. Its implementing regulations at 40 CFR Part 84 bring several changes on January 1, 2026, in addition to the 15-pound leak repair threshold already noted.

Global Warming Potential Limits on New Equipment

Several categories of new equipment face refrigerant GWP caps:

Residential and light commercial AC and heat pump systems, including mini-splits and unitary systems, are limited to refrigerants with a GWP of 700 or below.¹¹
Industrial process refrigeration chillers with exiting fluid temperatures above -30°C are limited to a GWP of 700.¹¹
Industrial process refrigeration systems (non-chiller) with 200 or more pounds of charge and evaporator temperatures above -30°C are restricted to a GWP of 150. Systems below 200 pounds get a cap of 300.¹¹

These caps don’t require ripping out existing high-GWP equipment. They apply to new installations and, in some cases, to equipment manufactured or imported before 2025 but not installed before the compliance date.¹² If a major system replacement is on the calendar for 2026 or later, the refrigerant choice becomes a regulatory question, not just an engineering one.

Automatic Leak Detection for Large Systems

Under Part 84, owners of industrial process refrigeration or commercial refrigeration systems with a full charge of 1,500 pounds or more must install and use an automatic leak detection system. The system must alert the owner when measurements indicate a loss of 50 pounds of refrigerant or 10% of the full charge, whichever is less.⁵ For a large supermarket rack system or an industrial cold storage facility, continuous monitoring is no longer optional.

Penalties

The Clean Air Act authorizes civil penalties of up to $25,000 per day for each violation. Inflation adjustments have pushed that figure above $45,000 per day.¹³ The per-day math is what makes refrigerant violations so financially dangerous. A leak that goes unrepaired for 60 days is not one violation. It is 60.

Beyond fines, the EPA can revoke or suspend a technician’s Section 608 certification for failing to follow the recovery and handling rules.³ Losing certification means losing the legal right to work on refrigeration systems. For equipment owners, enforcement usually opens with an information request or an inspection. The EPA doesn’t need to catch anyone in the act of venting. Missing records, undocumented refrigerant additions, and overdue repairs build the paper trail on their own.

1
eCFR. 40 CFR 82.154 – Prohibitions
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US EPA. Section 608 Technician Certification Requirements
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eCFR. 40 CFR Part 82 Subpart F – Recycling and Emissions Reduction
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Federal Register. Phasedown of Hydrofluorocarbons: Management of Certain Hydrofluorocarbons and Substitutes Under the AIM Act
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eCFR. 40 CFR 84.106 – Leak Repair
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US EPA. Stationary Refrigeration Leak Repair Requirements
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eCFR. 40 CFR 82.157 – Appliance Maintenance and Leak Repair
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eCFR. 40 CFR 82.157 – Appliance Maintenance and Leak Repair
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US EPA. Recordkeeping and Reporting Requirements for Stationary Refrigeration
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U.S. Environmental Protection Agency. Recordkeeping and Reporting for the 608 Refrigerant Management Program
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US EPA. Technology Transitions HFC Restrictions by Sector
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US EPA. Regulatory Actions for Technology Transitions
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Office of the Law Revision Counsel. 42 USC 7413 – Federal Enforcement