Understanding Federal Environmental Compliance: CAA, CWA, CERCLA and More

Federal environmental compliance is complex. But, it is also extremely important. Noncompliance can expose companies of all sizes to substantial liability—not only in government enforcement proceedings, but also in civil litigation involving commercial disputes and statutory private rights of action.

So, what does it take to effectively manage federal environmental compliance in 2026? As with all areas of compliance, a comprehensive and custom-tailored approach is key. Companies of all sizes must ensure that they have a clear understanding of their specific statutory and regulatory obligations, and they must develop and implement policies and procedures that are designed to help them maintain and document compliance on an ongoing basis.

An Introduction to Federal Environmental Compliance

Developing a comprehensive and custom-tailored environmental compliance program starts with understanding the obligations that apply. With this in mind, here is an introduction to some of the key federal statutes of which company owners, executives and in-house lawyers need to be aware:

Clean Air Act (CAA)

The Clean Air Act (CAA) regulates the emission of hazardous pollutants into the air. It applies to both “area sources” and “major sources” (an area source is any stationary source of air pollution that does not qualify as a major source), and it establishes stringent emission standards—including the Maximum Achievable Control Technology (MACT) standards for major sources.

The CAA also serves as the source of statutory authority for the Environmental Protection Agency’s National Ambient Air Quality Standards (NAAQS). The NAAQS further regulate air pollutant emissions with a focus on protecting public health.

Clean Water Act (CWA)

The Clean Water Act (CWA) regulates the emission of hazardous pollutants into the waters of the United States. It also establishes water quality standards. Under the CWA, the Environmental Protection Agency (EPA) has implemented extensive regulations governing everything from wastewater and industrial discharge contamination to surface water testing requirements. The CWA serves as the primary source of authority for the EPA’s National Pollutant Discharge Elimination System (NPDES) permit program, which covers discharges into federal and state navigable waters..

Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA)

The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) regulates the cleanup of contaminated sites and plays a major role in many commercial real estate transactions and mergers and acquisitions that involve real prolperty. Remediation costs can be substantial, and CERCLA provides mechanisms for purchasers and other parties to appropriately limit their liability as warranted.

CERCLA governs companies’ responses to spills and other contamination events as well—and, here too, companies’ liability exposure can be substantial. CERCLA liability is strict, joint and several, regardless of fault. As a result, CERCLA compliance is a critical aspect of overall federal environmental compliance for many companies.

Endangered Species Act (ESA)

While the Endangered Species Act (ESA) is among the more well-known federal environmental statutes, less well-known are the extensive compliance obligations it places on companies that interact (or have the potential to interact) with the environment. Among these is an obligation to avoid the “taking” of protected species, which includes causing harm to protected species’ habitats. The ESA establishes extensive pesticide-related controls as well, which are managed by the EPA’s Office of Pesticide Programs (OPP).

Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA)

The Federal Insecticide, Fungicide, and Rodenticide Act (FIFRA) also regulates companies’ use of pesticides, and its requirements and prohibitions extend far beyond those established under the ESA. For pesticide manufacturers, the law requires an affirmative demonstration that their products, “will not generally cause unreasonable adverse effects to the environment.” While ESA and FIFRA compliance often go hand-in-hand, ESA compliance is not necessarily sufficient for maintaining compliance with FIFRA.

National Environmental Policy Act (NEPA)

As the EPA explains, “[t]he National Environmental Policy Act (NEPA) was one of the first laws ever written that establishes the broad national framework for protecting our environment.” Under NEPA, companies must often meet extensive environmental review obligations in order to secure government approval or funding for proposed projects. These include the obligation to conduct Environmental Assessments (EAs) and Environmental Impact Statements (EISs), among many others.

Resource Conservation and Recovery Act (RCRA)

The Resource Conservation and Recovery Act (RCRA) gives the EPA, “the authority to control hazardous waste from cradle to grave.” As the EPA goes on to explain, this includes, “the generation, transportation, treatment, storage, and disposal of hazardous waste . . . . [as well as] the management of non-hazardous solid wastes.” As a result, the RCRA is a key source of environmental liability risk for many companies as well; and, here too, an informed and comprehensive approach to compliance is essential for avoiding both governmental enforcement actions and private civil litigation.

Safe Drinking Water Act (SDWA)

The Safe Drinking Water Act (SDWA) works alongside the CWA to regulate water contamination, with a specific focus on sources of drinking water in the United States. Under the SDWA, the EPA has established both primary and secondary standards regulating potential sources of contamination and other potential environmental harms.

Toxic Substances Control Act (TSCA)

The Toxic Substances Control Act (TSCA) also regulates various substances throughout their lifecycles, including asbestos, radon and polychlorinated biphenyls (PCBs), among others. Under the TSCA, the EPA has the authority to regulate substances covered under the statute before and during the manufacturing process as well as during and after use. A key aspect of the TSCA is its provision for Significant New Use Rules (SNURs), which allows the EPA to proactively regulate substances that “might create concerns” for the environment.

Again, these are just examples. Companies across the United States may need to comply with various other federal and state environmental laws and regulations as well. Once they have identified all pertinent laws and regulations, companies can manage their environmental risk with confidence, and they can make informed decisions about transactions and other business opportunities that have environmental implications going forward.

Speak with a Federal Environmental Compliance Lawyer at McLaughlin & Stern

If you have questions or concerns about your company’s federal environmental compliance obligations, we invite you to get in touch. To speak with an experienced federal environmental compliance lawyer at McLaughlin & Stern, please call 212-448-6247 or request an appointment online today.