All Knowledge & Insights By Date

On July 3, 2026, the Office of Management and Budget (OMB) published the Trump Administration’s 2026 Unified Agenda. The U.S. Environmental Protection Agency’s (EPA) Unified Agenda includes the following rulemakings under the Toxic Substances Control Act (TSCA): Cyclic Aliphatic Bromide Cluster (HBCD); Regulation under TSCA: According to EPA, this rulemaking will address the unreasonable risk of injury to health presented by HBCD. EPA states that TSCA Section 6(a) requires that EPA, when it...

On June 12, 2026, the U.S. Environmental Protection Agency (EPA) released its draft risk evaluation for 4,4'-(1-methylethylidene)bis[2, 6-dibromophenol] (TBBPA) under the Toxic Substances Control Act (TSCA). EPA states in its press release that “[u]sing gold standard science -- including real-world monitoring data and modeling -- the draft identifies unreasonable risk to workers from inhalation exposure (three conditions of use [COU]) and unreasonable risk to the environment from releases to...

The U.S. Environmental Protection Agency (EPA) announced on April 10, 2026, that it is advancing its review of four chemicals under the Toxic Substances Control Act (TSCA) -- 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta [g]-2-benzopyran (HHCB), phthalic anhydride, o-dichlorobenzene (oDCB), and p-dichlorobenzene (pDCB) -- by releasing draft documents related to the review of these chemicals and convening a Science Advisory Committee on Chemicals (SACC) peer review meeting. According to...

The U.S. Environmental Protection Agency (EPA) announced on January 6, 2026, the availability of the final risk evaluations under the Toxic Substances Control Act (TSCA) for butyl benzyl phthalate (BBP), dibutyl phthalate (DBP), dicyclohexyl phthalate (DCHP), diethylhexyl phthalate (DEHP), and diisobutyl phthalate (DIBP). 91 Fed. Reg. 373. EPA states that it “used the best available science to prepare these final risk evaluations, and determined, based on the weight of scientific evidence,...

The U.S. Environmental Protection Agency (EPA) announced on January 5, 2026, the availability of the final risk evaluation under the Toxic Substances Control Act (TSCA) for 1,3-butadiene. 91 Fed. Reg. 264. EPA states in its December 31, 2025, press release that it found “potential unreasonable health risks for workers who breathe in this chemical at their jobs in 11 specific industrial settings.” As required by TSCA, EPA will now develop a risk management rule to protect workers from the...

On December 3, 2025, the U.S. Environmental Protection Agency (EPA) announced the availability of and solicited public comment on an Updated Draft Risk Calculation Memorandum (Draft Memorandum) to inform a revised draft risk evaluation for formaldehyde under the Toxic Substances Control Act (TSCA). 90 Fed. Reg. 55726. EPA states that after further consideration of comments raised during the scientific peer review process, it is reconsidering the use of certain hazard values in the formaldehyde...

On November 19, 2025, the U.S. Environmental Protection Agency (EPA) announced the availability of and requested comment on a draft risk evaluation under the Toxic Substances Control Act (TSCA) for 1,2-dichloroethane (Chemical Abstracts Service Registry Number® (CAS RN®) 107-06-2, also known as ethylene dichloride or EDC). 90 Fed. Reg. 52054. EPA notes that the purpose of risk evaluations under TSCA is to determine whether a chemical substance presents an unreasonable risk of injury to health...

On November 10, 2025, the U.S. Environmental Protection Agency (EPA) announced that it is rescheduling the November 18, 2025, preparatory meeting for the Science Advisory Committee on Chemicals (SACC). The meeting to consider the scope and clarity of the draft charge questions for SACC’s peer review of EPA’s draft risk evaluation for octamethylcyclotetrasiloxane (D4) will now be held virtually on December 1, 2025. Registration for the meeting is open. To present oral comments during the...

As the federal government endures another prolonged shutdown, uncertainty is rippling through every agency, with the impact clearly visible at the U.S. Environmental Protection Agency (EPA). With only a fraction of staff on duty and most routine operations halted, the chemical and pesticide regulatory landscape faces a new round of challenges in both the Office of Pollution Prevention and Toxics (OPPT) and the Office of Pesticide Programs (OPP). EPA’s September 29, 2025, contingency plan...

On Sept. 23, 2025, the U.S. Environmental Protection Agency (EPA) proposed highly anticipated amendments to the procedural framework rule for conducting existing chemical risk evaluations under the Toxic Substances Control Act (TSCA). When conducting a TSCA existing chemical risk evaluation, EPA must determine whether a chemical substance presents an unreasonable risk of injury to health or the environment, without considering costs or non-risk factors under the conditions of use (COU). As...

On September 23, 2025, the U.S. Environmental Protection Agency (EPA) proposed highly anticipated amendments to the procedural framework rule for conducting existing chemical risk evaluations under the Toxic Substances Control Act (TSCA). 90 Fed. Reg. 45690. When conducting an existing chemical risk evaluation under TSCA, EPA must determine whether a chemical substance presents an unreasonable risk of injury to health or the environment, without considering costs or nonrisk factors, including...

The U.S. Environmental Protection Agency (EPA) announced on September 10, 2025, that it is seeking nominations of scientific and technical experts to be considered as ad hoc reviewers assisting the Science Advisory Committee on Chemicals (SACC) with the peer review of the draft risk evaluation of octamethylcyclotetrasiloxane (D4) under the Toxic Substances Control Act (TSCA). EPA states that these nominations will help it select approximately seven to eight ad hoc reviewers to assist SACC with...

As reported in our May 30, 2025, blog item, on May 15, 2025, the Center for Environmental Accountability (CEA) filed a petition under Section 21 of the Toxic Substances Control Act (TSCA) requesting that the U.S. Environmental Protection Agency (EPA) reconsider the 2024 final rule regarding procedures for chemical risk evaluation under TSCA and initiate a rulemaking to amend certain provisions in 40 C.F.R. Part 702, subpart B. According to CEA, the current process “has led to overly...

The U.S. Environmental Protection Agency (EPA) announced on August 6, 2025, the availability of the draft Toxic Substances Control Act (TSCA) risk evaluations for the phthalates butyl benzyl phthalate (BBP) and diisobutyl phthalate (DIBP) for public comment. 90 Fed. Reg. 37855. According to EPA, the purpose of TSCA risk evaluations is to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment under the conditions of use (COU), including...

The U.S. Environmental Protection Agency (EPA) announced on August 8, 2025, that it seeks self-nominations from small businesses, governments, and not-for-profits to participate as Small Entity Representatives (SER) providing advice and recommendations for two separate Small Business Advocacy Review (SBAR) Panels. One SBAR Panel will focus on EPA’s development of a proposed rule to address unreasonable risk identified in the Toxic Substances Control Act (TSCA) risk evaluation for asbestos part...

On August 4, 2025, the U.S. Environmental Protection Agency (EPA) submitted to the Office of Management and Budget (OMB) a proposed rule entitled “Further Reconsideration of Procedures for Chemical Risk Evaluation Under the Toxic Substances Control Act (TSCA).” As reported in our March 14, 2025, memorandum, on March 10, 2025, EPA announced its intent to reconsider the May 2024 rule amending the procedural framework rule for conducting TSCA risk evaluations. According to EPA’s March 10,...

On June 25, 2025, Bergeson & Campbell, P.C. (B&C®), the Environmental Law Institute (ELI), and the George Washington University (GWU) Milken Institute School of Public Health presented “TSCA Reform -- Nine Years Later.” This virtual conference marked the ninth Toxic Substances Control Act (TSCA) Annual Conference, reflecting on the accomplishments and challenges since the implementation of the 2016 Frank R. Lautenberg Chemical Safety for the 21st Century Act (Lautenberg Act) and...

On June 16, 2025, the U.S. Environmental Protection Agency (EPA) filed a motion with the U.S. Court of Appeals for the Fifth Circuit requesting that litigation over its 2024 final rule regulating chrysotile asbestos under the Toxic Substances Control Act (TSCA) be held in abeyance for an additional six months. According to the filing, EPA intends to initiate a new notice-and-comment rulemaking to reconsider certain provisions of the rule. The litigation, Texas Chemistry Council, et al. v. EPA,...

On June 16, 2025, the U.S. Environmental Protection Agency (EPA) announced the release of the draft charge questions for discussion at the upcoming Science Advisory Committee on Chemicals (SACC) meeting to review all documents released thus far on the risk evaluations of five phthalates. SACC will review the draft risk evaluations for dibutyl phthalate (DBP), di(2-ethylhexyl) phthalate (DEHP), and dicyclohexyl phthalate (DCHP), as well as cross-cutting documents related to DBP, DEHP, DCHP, butyl...

Download transcript. This week, I discuss with Patricia Underwood, Ph.D., DABT, MBA, Chief Toxicologist, Principal Director – Chemical and Material Risk Management, Office of the Assistant Secretary of Defense, Department of Defense, and my colleague, Richard E. Engler, Ph.D., Director of Chemistry for B&C and The Acta Group (Acta®), our consulting affiliate, the U.S. Department of Defense’s (DOD) recent Request for Information (RFI) on chemicals undergoing U.S. Environmental...

On May 27, 2025, the U.S. Department of Defense (DOD) issued a request for information (RFI) to gather information to identify and assess critical applications for DOD and the defense industrial base (DIB) that necessitate the use of existing chemicals undergoing the U.S. Environmental Protection Agency’s (EPA) Toxic Substances Control Act (TSCA) Section 6 risk evaluation process. The RFI states that it will help the Office of the Assistant Secretary of Defense for Energy, Installations, and...

On May 15, 2025, the Center for Environmental Accountability (CEA) filed a petition under Section 21 of the Toxic Substances Control Act (TSCA) requesting that the U.S. Environmental Protection Agency (EPA) reconsider the 2024 final rule regarding procedures for chemical risk evaluation under TSCA and initiate a rulemaking to amend certain provisions in 40 C.F.R. Part 702, subpart B. According to CEA, the current process “has led to overly conservative risk conclusions and, in turn,...

The U.S. Environmental Protection Agency (EPA) announced on April 30, 2025, that it is requesting public comments on candidates who are interested and available to serve as ad hoc reviewers assisting its Science Advisory Committee on Chemicals (SACC) in the peer review of the Agency’s data, methods, models, and approaches for the draft Toxic Substances Control Act (TSCA) risk evaluations of dibutyl phthalate (DBP), di(2-ethylhexyl) phthalate (DEHP), and dicyclohexyl phthalate (DCHP). According...

On May 2, 2025, U.S. Environmental Protection Agency (EPA) Administrator Lee Zeldin announced the “[n]ext phase of organizational improvements to better integrate science into agency offices.” As part of this reorganization effort, Administrator Zeldin introduced the creation of the Office of Applied Science and Environmental Solutions (OASES) within the Office of the Administrator. According to Zeldin, OASES will “align research and put science at the forefront of the agency’s...

As reported in our March 31, 2025, blog item, on March 21, 2025, the U.S. Court of Appeals for the District of Columbia Circuit heard oral argument in a case challenging the U.S. Environmental Protection Agency’s (EPA) May 3, 2024, final rule amending the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (USW) v. EPA,...

On March 21, 2025, the U.S. Court of Appeals for the District of Columbia Circuit heard oral argument in a case challenging the U.S. Environmental Protection Agency’s (EPA) May 3, 2024, final rule amending the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Service Workers International Union (USW) v. EPA, Consolidated Case No. 24-1151. If you have a...

On March 10, 2025, the U.S. Environmental Protection Agency (EPA) announced its intent to reconsider the May 3, 2024, rule amending the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA) (2024 Risk Evaluation Framework Rule). According to EPA, it will initiate a rulemaking “that will ensure the agency can efficiently and effectively protect human health and the environment and follow the law.” As reported in our February 7, 2025, blog...

The U.S. Environmental Protection Agency (EPA) announced on March 11, 2025, the rescheduled meeting dates of the Science Advisory Committee on Chemicals (SACC) that had been previously scheduled for February 2025 to consider and review the draft risk evaluation for 1,3-butadiene. 90 Fed. Reg. 11737. The rescheduled preparatory meeting for the SACC to consider the scope and clarity of the revised draft charge questions for the peer review will now be held on March 25, 2025, and the rescheduled...

The U.S. Environmental Protection Agency (EPA) announced on March 7, 2025, that it is extending the comment period on the draft risk evaluation for dicyclohexyl phthalate (DCHP) under the Toxic Substances Control Act (TSCA). EPA released the risk evaluation for DCHP on January 7, 2025, with a comment period that closed March 10, 2025. EPA states that it will soon publish a Federal Register notice extending the public comment period for an additional 60 days. Upon publication of the Federal...

On March 5, 2025, the U.S. Environmental Protection Agency (EPA) extended the comment period on the draft scope of the risk evaluation to be conducted under the Toxic Substances Control Act (TSCA) for vinyl chloride. 90 Fed. Reg. 11315. As reported in our January 28, 2025, memorandum, under TSCA, the scope documents must include the conditions of use (COU), hazards, exposures, and the potentially exposed or susceptible subpopulations (PESS) that EPA expects to consider in conducting its risk...

The U.S. Environmental Protection Agency (EPA) announced on January 31, 2025, that it is extending the public comment period on the draft risk evaluation for 1,3-butadiene under the Toxic Substances Control Act (TSCA). 90 Fed. Reg. 8798. Comments that were due February 3, 2025, are now due March 5, 2025. EPA states in its announcement that to give the peer reviewers on the Science Advisory Committee on Chemicals (SACC) time to review any additional comments received, it is in the process of...

On January 16, 2025, the U.S. Environmental Protection Agency (EPA) announced the availability of and requested public comment on the draft scope of the risk evaluation to be conducted under the Toxic Substances Control Act (TSCA) for vinyl chloride. 90 Fed. Reg. 4738. EPA notes that under TSCA, the scope documents must include the conditions of use (COU), hazards, exposures, and the potentially exposed or susceptible subpopulations (PESS) that EPA expects to consider in conducting its risk...

The U.S. Environmental Protection Agency (EPA) announced on September 3, 2024, the release of the draft risk evaluation for diisononyl phthalate (DINP) under the Toxic Substances Control Act (TSCA) for public comment. 89 Fed. Reg. 71270. EPA states in its August 30, 2024, press release that it preliminarily determined that two industrial uses and one consumer use “significantly contribute to the unreasonable risk of DINP out of the 45 uses evaluated.” EPA preliminarily determined that DINP...

The U.S. Environmental Protection Agency (EPA) announced on July 25, 2024, that it is proposing to designate acetaldehyde, acrylonitrile, benzenamine, vinyl chloride, and 4,4-methylene bis(2-chloroaniline) (MBOCA) as high-priority substances (HPS) for risk evaluation under the Toxic Substances Control Act (TSCA). 89 Fed. Reg. 60420. EPA is providing a 90-day comment period, during which interested persons may submit comments on the proposed designations of these chemicals as HPSs for risk...

The U.S. Environmental Protection Agency (EPA) announced on May 20, 2024, the availability of and solicited public comment on the draft manufacturer-requested risk evaluation (MRRE) for di-isodecyl phthalate (DIDP) and the draft physical chemical, fate, and hazard assessments for di-isononyl phthalate (DINP) prepared under the Toxic Substances Control Act (TSCA). 89 Fed. Reg. 43847. In its May 17, 2024, press release, EPA states that it preliminarily determined that all but one of the uses of...

The U.S. Environmental Protection Agency (EPA) released a final rule on April 23, 2024, that amends the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). According to the final rule, published in the Federal Register on May 3, 2024, EPA reconsidered the procedural framework rule for conducting such risk evaluations and is revising certain aspects of that framework to align better with the statutory text and applicable court decisions, to...

On May 3, 2024, comments by Lynn L. Bergeson were featured in Chemical Watch’s article on possible legal challenges to updated TSCA risk evaluation procedures. "The rule is so foundational", said Lynn Bergeson, managing partner at Bergeson & Campbell. If there is a lawsuit, both NGOs and industry "can be expected to claim that the other’s view is unsupported".  In its 2019 decision, the Ninth Circuit declined to weigh in on many issues, stating that it was premature to...

On April 16, 2024, the U.S. Environmental Protection Agency (EPA) announced the availability of and requested public comment on a draft document titled “Draft Risk Evaluation for Asbestos Part 2: Supplemental Evaluation Including Legacy Uses and Associated Disposals of Asbestos” (the Draft Asbestos Part 2). 89 Fed. Reg. 26878. EPA is evaluating legacy uses and associated disposals of asbestos, including chrysotile asbestos, five additional fiber types, asbestos-containing talc, and Libby...

The U.S. Environmental Protection Agency (EPA) published on March 26, 2024, a proposed rule requiring manufacturers (including importers) of 16 chemical substances to submit copies and lists of certain unpublished health and safety studies to EPA. 89 Fed. Reg. 20918. EPA identified 15 of the chemical substances as potential candidates for prioritization through a screening process based on a combination of hazard, exposure (including uses), and persistence and bioaccumulation characteristics....

The U.S. Environmental Protection Agency (EPA) announced on March 15, 2024, the availability of and solicited public comment on the 2024 draft risk evaluation for formaldehyde prepared under the Toxic Substances Control Act (TSCA). 89 Fed. Reg. 18933. EPA states that it “preliminarily finds that formaldehyde poses unreasonable risk to human health. The risk evaluation notes that these risks may not apply to everyone, everywhere and describes some of the sources of uncertainties in EPA’s...

The U.S. Environmental Protection Agency (EPA) announced on February 14, 2024, the list of ten scientific experts selected to review the 2023 draft risk evaluation for tris(2-chloroethyl) phosphate (TCEP) under the Toxic Substances Control Act (TSCA). Biographies of these experts are available in docket EPA-HQ-OPPT-2023-0265. EPA states that it will hold a virtual public meeting on March 5, 2024, to review the documents and draft charge questions being posed to the reviewers and address any...

On December 28, 2023, the U.S. Environmental Protection Agency (EPA) released comments from the letter peer review for its 2023 white paper presenting EPA’s quantitative approach for the human health risk assessment for part 2 of the Toxic Substances Control Act (TSCA) risk evaluation for asbestos. EPA notes in its December 28, 2023, press release that under the previous Administration, it narrowed the scope of the asbestos risk evaluation by reviewing only ongoing uses and excluding legacy...

The U.S. Environmental Protection Agency (EPA) announced on October 19, 2023, a proposed rule that would amend the procedural framework rule for conducting risk evaluations under the Toxic Substances Control Act (TSCA). Published in the Federal Register on October 30, 2023, the proposed rule states that the purpose of risk evaluations under TSCA is to determine whether a chemical substance presents an unreasonable risk of injury to health or the environment, without considering costs or non-risk...

The American Chemistry Council (ACC) announced on September 20, 2023, that together with the Texas Chemical Council, it submitted a 60-day notice of intent to file suit for the U.S. Environmental Protection Agency’s (EPA) failure to complete manufacturer-requested risk evaluations (MRRE) for diisononyl phthalate (DINP) and diisodecyl phthalate (DIDP) under the Toxic Substances Control Act (TSCA). ACC states that EPA failed to complete the MRREs by TSCA’s mandatory deadline of three years and...

On August 3, 2023, the U.S. Environmental Protection Agency (EPA) announced the availability of and solicited public comment on the document entitled “White Paper: Quantitative Human Health Approach to be Applied in the Risk Evaluation for Asbestos Part 2 -- Supplemental Evaluation including Legacy Uses and Associated Disposals of Asbestos” (White Paper) and related charge questions. 88 Fed. Reg. 51309. EPA states that it will be soliciting comments from expert ad hoc reviewers on the...

Earthjustice announced on September 18, 2023, that environmental justice and health advocates have filed suit in the U.S. District Court for the District of Columbia against the U.S. Environmental Protection Agency (EPA) “for missing statutory deadlines to complete risk evaluations for 22 toxic chemicals released in high volumes in fenceline communities and found in many everyday consumer products.” Earthjustice states that “EPA initiated risk evaluations for the nearly two dozen toxic...

The U.S. Environmental Protection Agency’s (EPA) spring 2023 Unified Agenda, published on June 13, 2023, includes the following rulemakings under the Toxic Substances Control Act (TSCA) or the Toxics Release Inventory (TRI). Proposed Rule Stage Tiered Data Reporting to Inform Prioritization, Risk Evaluation and Risk Management under TSCA (RIN: 2070-AK62): EPA is developing a rulemaking under TSCA Sections 8(a) and (d) to establish reporting requirements based upon a chemical’s status in...

On July 7, 2023, Earthjustice, on behalf of its clients, announced that it notified the U.S. Environmental Protection Agency (EPA) of its intent to sue for missing the statutory deadlines under the Toxic Substances Control Act (TSCA) for EPA to evaluate the risks to public health posed by 22 toxic chemicals. Earthjustice states that until EPA completes the overdue risk evaluations, “some of the most dangerous and widely used chemicals on the market will remain unregulated under [TSCA].”...

On June 22, 2023, the U.S. Environmental Protection Agency (EPA) called for public nominations of scientific and technical experts to review the “2023 White Paper on the Quantitative Human Health Approach to be Applied in the Risk Evaluation for Asbestos Part 2.” 88 Fed. Reg. 40819. EPA states that it will release the white paper for public review and comment in late July 2023 and subsequently submit it for letter peer review. EPA currently anticipates selecting approximately ten to 15...

Bergeson & Campbell, P.C.’s (B&C®) May 17, 2023, webinar, “TOP TSCA TOPICS: PFAS, Cumulative Risk, NAMs, Risk Evaluations, CBI, and More,” is now available for on-demand viewing. During this one-hour webinar, Anna B. Lowit, Ph.D., Senior Science Advisor, the U.S. Environmental Protection Agency (EPA) Office of Pollution Prevention and Toxics (OPPT); Richard E. Engler, Ph.D., Director of Chemistry, B&C; and Lynn L. Bergeson, Managing Partner, B&C, discussed...