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CARB Formaldehyde Compliance

For Composite Wood Products in California

Assure your customers that your composite wood products comply fully with the California Air Resources Board (CARB) Airborne Toxic Control Measure (ATCM 93120) for formaldehyde emissions. Producers selling hardwood plywood (veneer or composite core), particleboard, and medium density fiberboard (MDF) products in California must comply.

As a leader in environmental claims certification, SCS provides professional, timely services worldwide. Bundle your ATCM 93120 with other certifications, such as FSC, recycled content, and indoor air quality, for even greater recognition and cost-efficiency.

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Erik Hanba
Program Manager

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CalCompliant CARB BrochureBrochure: CARB ATCM 93120 Certification

Find out what it takes to get certified under CARB ATCM 93120.

Program Details


This program applies to producers of medium density fiberboard (MDF), particle board (PB), and hardwood plywood (HWP), including veneer and composite core.

Program Criteria

Formaldehyde levels in certified products must fall within established limits set by the state of California for each type of product. For more information about the regulation, including updates and advisories, see:



  1. Apply for Certification

    Complete and submit an SCS Application Form. SCS scopes the project based on information provided in the application and prepares a proposal for your approval with a suggested timeline and quote. Once you approve the proposal, you sign a Work Order.  An SCS account manager is be assigned to guide you through the certification process.

  2. Data Collection

    An SCS technical coordinator helps you assemble preliminary data that will be submitted to SCS. SCS reviews the product data, corporate documentation, manufacturing process, product formulation, testing, etc., and assesses your readiness for an audit. Once sufficient data is collected, an auditor is assigned.

  3. On-site Audit

    The auditor conducts an on-site audit to evaluate your data. The auditor interacts with your technical staff to clarify and obtain any additional information that might prove essential to reaching an accurate supportable evaluation.

  4. Draft Assessment Report

    The auditor writes a draft assessment report that details the findings of the audit, which includes data analysis, non-conformities, and opportunities for improvement.

  5. Internal peer review

    A second qualified SCS representative reviews the report, making any necessary corrections or changes before the report is sent to the client.

  6. Corrective Actions

    You respond to any non-conformities with a Corrective Action Plan. You may also make comments and responses to the information contained in the report and the conclusions drawn by the auditor.

  7. Certification Decision

    SCS conducts a final technical review of the assessment report and makes the final certification decision. If certification is granted, SCS issues the certificate and final report to your facility or operation. Once certified, your company is listed in the Green Products Certificate Database on the SCS website.

  8. Certification Maintenance and Renewal

    Depending on the certification, SCS requires annual audits to maintain your certification and support continual improvement.


The State of California Air Resources Board provides an extensive list of questions frequently asked about the implementation of this regulation. Some of these questions and answers are excerpted below. For the full set, visit:

What composite wood products fall under the airborne toxic control measure (ATCM)?

The ATCM applies to all hardwood plywood (HWPW), particleboard (PB), and medium density fiberboard (MDF), including thin MDF (≤ 8 mm), and finished goods that contain these products, that are sold, offered for sale, supplied, used, or manufactured for sale in California.

What specific products are not covered by the ATCM?

Materials that are not covered by the ATCM include, but are not limited to hardboard, natural wood, and certified structural plywood, certified structural panels, structural composite lumber, oriented strand board, glue laminated timber, prefabricated wood I-joist, finger jointed lumber, or "composite wood products" used inside of new vehicles, rail cars, boats, aerospace craft or aircraft (please also refer to question #23).

What are examples of finished goods?

Finished goods mean any good or product other than a panel, containing HWPW, PB, and MDF. Finished goods include, but are not limited to furniture, cabinets, shelving, countertops, flooring, moldings, caskets, base boards, rosettes, corbels, etc.

Who does the ATCM apply to?

The ATCM applies to manufacturers, distributors, importers, fabricators, and retailers of the products described in question 1, as well as third party certifiers of manufacturers.

Does the ATCM apply to blockboard?

No, blockboard is not covered by the ATCM since it is not included in the definition of HWPW.

Does the ATCM apply to molded pallet blocks?

Molded pallet blocks that are made in individual molds and made specifically as molded pallet components are exempt for the ATCM. If in a given manufacturing process no flat panels are made or used, and if the resulting molded pallet block products have a very specific purpose, then molded pallet block products would not be subject to the ATCM.

Does SCS provide certification support?

SCS provides ongoing program support, including on-going staff assistance, marketing and promotional support, and information about new or revised requirements. Certified clients will receive information about creating batch-specific Lot Labels for on-product use.


ATCM 93120 (English)


ATCM 93120 (Chinese)

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