Maryland asbestos regulations run on two tracks at once: the Maryland Department of the Environment (MDE) enforces state rules under COMAR 26.11.21, and federal standards from the EPA and OSHA set the baseline that Maryland adopts and in places tightens.1Library of Maryland Regulations. COMAR 26.11.21 – Control of Asbestos If you’re involved in demolition, renovation, or maintenance that could disturb asbestos-containing material in the state, you need to notify the MDE before work starts, use licensed and accredited people, follow prescribed removal and disposal methods, and keep records for six years. The penalties for skipping any of that reach $25,000 per day.
How the State and Federal Rules Fit Together
Two federal frameworks sit under Maryland’s rules. The EPA’s National Emission Standard for Hazardous Air Pollutants (NESHAP) under 40 CFR Part 61, Subpart M governs notification, work practices, and waste handling for demolition and renovation.2eCFR. 40 CFR Part 61 Subpart M – National Emission Standard for Asbestos OSHA governs what workers can be exposed to on the job. COMAR 26.11.21 incorporates NESHAP and adds Maryland-specific licensing, training, recordkeeping, and enforcement provisions.
Where the Maryland rule is stricter, the Maryland rule controls. Where Maryland is silent, the federal rule still applies. You comply with both layers at the same time.
Notification Before Demolition or Renovation
Written notice to the MDE must be filed at least 10 working days before work begins that will disturb asbestos-containing material. This tracks the federal NESHAP requirement in 40 CFR 61.145, which calls for the same 10-working-day written notice.3eCFR. 40 CFR 61.145 – Standard for Demolition and Renovation
For renovations, the notification trigger is a quantity threshold. You must notify if the regulated asbestos-containing material meets or exceeds any of these amounts:
- 260 linear feet on pipes
- 160 square feet on other building components
- 35 cubic feet where length or area can’t be measured
All demolitions require notification regardless of the amount of asbestos present. Emergency demolitions ordered by a government agency have a compressed deadline: notify as early as possible, and no later than the next working day. If your start date changes, update the MDE, and in most cases file a new written notice 10 working days before the revised start.
Work Practice Standards During Removal
COMAR 26.11.21.06 sets out exactly how asbestos removal must be carried out on projects subject to NESHAP. The requirements are prescriptive, and the MDE treats departures as violations whether or not fibers were actually released.
Containment and Wet Methods
Material being removed must be wetted with a surfactant solution that penetrates friable asbestos and keeps it wet through the removal.4Library of Maryland Regulations. COMAR 26.11.21.06 – Control of Emissions from an Asbestos Project Subject to NESHAP Work areas must be sealed off with plastic sheeting at least 6 mils thick and waterproof tape. Negative-pressure systems with HEPA filters are required inside enclosures to keep fibers from migrating into occupied parts of the building.
Cleaning and Air Monitoring
After removal, the area is cleaned with the surfactant solution, dried, and vacuumed with a HEPA-filtered vacuum. That cycle repeats until no visible residue remains and air monitoring confirms airborne concentration below 0.01 fibers per cubic centimeter. At least one sample is required per room, and at least one per 50,000 cubic feet or 5,000 square feet of floor area, whichever yields more samples. Barriers stay up until clearance monitoring confirms safe levels. Within 24 hours of receiving the final results, the contractor must submit the air monitoring record to the MDE.
Waste Disposal
Asbestos waste has to be contained, labeled, and taken to an approved disposal facility. Off-site transport requires a Uniform Hazardous Waste Manifest tracking the waste from origin to the receiving landfill, with every handler signing and keeping a copy.5US Environmental Protection Agency. Hazardous Waste Manifest System Maryland may impose additional state-specific waste codes, so confirm requirements with the MDE before transport.
Recordkeeping
Under COMAR 26.11.21.09, records of asbestos activity, including quantities, methods, air monitoring results, and final disposal location, must be kept for at least six years and made available to the MDE on inspection.6Library of Maryland Regulations. COMAR 26.11.21.09 – Records Six years is a long retention window, and missing documentation becomes its own compliance problem during an audit.
Who Needs a License or Certification
The MDE operates a two-layer credentialing system. Individual workers need accredited training and certification. Companies need a separate business license.
Workers
Every person performing asbestos work in Maryland must complete a training course accredited by either the MDE or the EPA.7Maryland Department of the Environment. Training and Accreditation Requirements to Provide Asbestos Services The EPA’s Model Accreditation Plan recognizes five disciplines: worker, contractor/supervisor, inspector, management planner, and project designer.8US EPA. Asbestos Professionals Anyone trained since October 1, 2013 must also pass a third-party exam administered by the MDE. Annual refresher training is required to keep credentials active.
Contractors
Abatement companies need an MDE-issued license, valid for one year and renewable annually.9Maryland Department of the Environment. Asbestos for Contractors The application requires proof of insurance, worker safety programs, and evidence of financial stability. Fees range from $0 to $625.10Maryland OneStop. Asbestos Contractor License The responsibility for making sure every worker on a job has current credentials sits with the employer. Sending an uncertified worker to a project is a company violation, not just an individual one.
OSHA Worker Exposure Limits
The MDE handles the environmental side. OSHA handles the worker side, and those rules apply in Maryland the same way they do elsewhere. The permissible exposure limit for asbestos is 0.1 fibers per cubic centimeter of air averaged over an eight-hour workday, with a separate excursion limit of 1.0 fiber per cubic centimeter over any 30-minute period.11Occupational Safety and Health Administration. 1926.1101 App H – Substance Technical Information for Asbestos
If any employee is exposed at or above the 0.1 fibers per cubic centimeter PEL, the employer must put a medical surveillance program in place, with regular examinations at the employer’s expense.12Occupational Safety and Health Administration. 1910.1001 App H – Medical Surveillance Guidelines for Asbestos Smaller abatement firms frequently overlook this requirement, and it’s often where OSHA inspections focus.
Residential Exemptions, and Where They End
Under NESHAP, residential buildings with four or fewer dwelling units are generally exempt from the demolition and renovation requirements.13U.S. Environmental Protection Agency. Letter Regarding Asbestos NESHAP Residential Building Exemption A homeowner renovating a single-family house usually doesn’t need to file a NESHAP notification or follow the federal work practice standards.
The exemption is narrower than it looks. You lose it in these situations:
- Two or more residential buildings under the same owner demolished as part of one project are treated as an “installation” and fully regulated.
- A residential demolition combined with a commercial or institutional building under the same owner triggers full NESHAP compliance for everything.
- Spacing demolitions of multiple buildings over a planning period doesn’t avoid the rules. The EPA prohibits circumventing NESHAP through piecemeal operations.
Developers sometimes assume that because each individual home has four or fewer units, they qualify. That’s wrong if multiple homes are being demolished as part of a larger project. A single developer-owned home demolished in isolation does qualify, regardless of whether the owner is an individual or a company.
On the sale side, federal law doesn’t require a home seller to disclose asbestos to a buyer, though state or local rules may.14US EPA. Does a Home Seller Have to Disclose to a Potential Buyer That a Home Contains Asbestos? Buyers of older properties, especially those built before the late 1980s, should consider requesting an asbestos inspection.
Penalties for Violations
Maryland imposes civil and criminal penalties, and the MDE enforces them. The most common violations are failing to notify before demolition, improper handling or disposal of asbestos waste, and performing work without the required license or training.
Civil Penalties
Under Maryland Environment Article §6-422, a violation of the asbestos subtitle or its regulations can bring a civil penalty of up to $25,000 per violation, collected through a civil action. Each day a violation continues is a separate violation, so a week of noncompliance can theoretically expose a violator to $175,000.15Maryland General Assembly. Maryland Environment Code 6-422 – Penalties A parallel air-quality provision under §2-610 carries the same $25,000-per-day structure for violations that release fibers into the air.16Maryland General Assembly. Maryland Environment Code 2-610 – Civil Penalty
Actual penalties depend on the severity of the violation, whether it caused harm or risk to public health, and the violator’s compliance history. Repeat offenders face the top of the range.
Criminal Penalties
Knowing and willful violations move into criminal territory. Under §6-422(b), a first offense is a misdemeanor punishable by a fine up to $20,000. A second or subsequent offense carries a fine up to $25,000, imprisonment up to two years, or both. The MDE can also issue cease-and-desist orders halting work until violations are corrected.
Collateral Consequences
Beyond fines, companies in violation can face civil suits from affected individuals, loss of the asbestos contractor license, and a compliance record that disqualifies them from future contracts, especially government work.
Reducing Penalty Exposure
Facing an enforcement action doesn’t mean paying the full amount. If the Attorney General concurs, the Secretary of the Environment can compromise and settle penalty claims under §2-610. If the violator eliminates the problem within 36 months, up to 75% of the settled penalty may be returned.16Maryland General Assembly. Maryland Environment Code 2-610 – Civil Penalty For a first-time violator who moves quickly to correct the problem, this is often the most realistic way to limit financial damage.
Defenses do exist. The strongest involves genuinely uncontrollable circumstances: a natural disaster, an emergency collapse, or asbestos concealed in a way no reasonable inspection would have found. The burden is on the defendant to prove all reasonable compliance steps were taken beforehand and the response afterward was prompt. A de minimis argument, that the violation was so minor it caused no actual harm, is theoretically available but rarely succeeds on its own, because the MDE treats departures from notification and work-practice rules as inherently risky. Even strong documentation showing exposure stayed below thresholds usually produces a reduced penalty rather than no penalty at all.
The practical lesson is to document everything, correct problems the moment they surface, and not wait for the MDE to arrive before fixing a known deficiency.