EPA Finalizes CWA Section 401 Water Quality Certification Regulation


Yesterday, on June 1, the U.S. Environmental Protection Agency (EPA) Administrator, Andrew Wheeler, signed a final rule seeking to increase predictability for applicants by clarifying the regulations that govern the Clean Water Act (CWA) Section 401 water quality certification process.

As discussed in earlier blog posts, certain states have relied on ambiguities in the CWA Section 401 water quality certification process to block the construction of significant energy infrastructure projects (e.g., oil and gas pipelines, coal export facilities, and liquid natural gas terminals) determined by federal agencies to be in the public interest of individual states, regions, and the nation as a whole. For example, on May 15, the New York State Department of Environmental Conservation (DEC) denied a CWA section 401 water quality certification associated with the construction and operation of an interstate natural gas pipeline. The denial was based, in part, on DEC findings associated with greenhouse gas (GHG) emissions and New York’s recently-enacted Climate Leadership and Community Protection Act, which requires a 40 percent reduction in statewide GHG emissions from 1990 levels by 2030 (and an 85 percent reduction by 2050), and 100 percent of New York’s electricity generated by carbon-free energy by 2040.

CWA Section 401 requires applicants for a federal license or permit anticipated to result in discharges to navigable waters to obtain a certification from the relevant state that the discharge will comply with applicable state water quality standards. States can waive this requirement, and if they do not act within “a reasonable period of time (which shall not exceed one year) after receipt” of the request for the certification, waiver is automatic. 33 U.S.C. § 1341(a).  Contrary to this plain language, projects have been derailed or significantly delayed when states exceed the statutory one-year time limit for certification or deny certification for reasons unrelated to water quality, such as a project’s potential downstream GHG emissions.

EPA’s existing regulations were promulgated in 1971 and pre-date the 1972 CWA amendments. In accordance with Executive Order 13868, which directed EPA to clarify the certification process and revise its outdated regulations, yesterday, EPA Administrator Andrew Wheeler signed the pre-publication version of the final rule.

Key Aspects of EPA’s Final Rule

Our October 31, 2019 blog post, provided an overview of EPA’s proposal to revise and update its CWA Section 401 regulations. Although the final rule is very similar to the proposal, it includes a number of key changes. Key aspects of the final rule and changes that EPA made since the proposal are included below:

New Water Quality Certification Process

Under the final rule, the water quality certification process would follow the sequence outlined in the flow chart, below.

Click image to view larger.

The rule will go into effect 60 days after the date of publication in the Federal Register and will likely draw legal challenges from certain states and environmental groups who oppose the rule. The final CWA Section 401 water quality certification rule is another wrinkle in the evolving CWA regulatory landscape, adding to other recent developments, for example, the County of Maui U.S. Supreme Court opinion in County of Maui and the final Navigable Waters Protection Rule.


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National Law Review, Volume X, Number 154