By Melanie Condon

The Environmental Protection Agency (EPA) along with the Army Corps of Engineers (USACE) have released the long-awaited Definition of “Waters of the U.S.” Under the Clean Water Act proposed draft rule. 

The definition clarifies which of the nation’s waterways fall under the Clean Water Act (CWA) permitting requirements. EPA originally submitted clarification for CWA jurisdiction for waters of the U.S. to the Office of Management and Budget (OMB) as a guidance document in 2011. However, in September 2013 EPA announced it would be moving forward with a rulemaking process and retracting the guidance document that was still under review at OMB.

NCSL has long urged the administration to undertake a formal rulemaking process instead of issuing guidance to clarify “waters of the U.S.” under the CWA, and was pleased to see EPA take this step. EPA noted in the proposal that they will continue to work closely with the states with respect to development of a final rule.

On a recent outreach call with state and local associations, Acting Assistant Administrator for Water Nancy Stoner explained the waters/wetlands that will be covered under the CWA in the proposed rule. These include: all interstate waters, including interstate wetlands; all waters that are currently used for interstate or foreign commerce; the territorial seas; tributaries and impoundments of the above mentioned waters; and all adjacent waters to the above mentioned waters.

The proposed rule does not add new types of waterways that have not historically been covered under the CWA. Furthermore, the draft rule has a number of exemptions for waterways that will not be required to have CWA permits, including waste treatment facilities, converted cropland, ditches that do not have perennial flow and agricultural activities.

Additionally, for those waterways that are geographically isolated from navigable waterways (known as “other waters”), the rule would define the scope of regulatory jurisdiction as was outlined in the U.S. Supreme Court Case Rapanos v. United States and aims to stick closely with the court’s interpretation. To this end, the proposal will initiate a case-specific significant nexus evaluation for any “other water” or wetland before it is determined to fit under the CWA jurisdiction.

Along with the release of the draft proposal, the EPA and USACE simultaneously released an “interpretative rule” effective immediately that ensures 53 specific conservation practices that protect or improve water quality will not be subject to CWA permitting requirements.

The proposed rule will be open for public comment for 90 days past the date it is published in the Federal Register (expected imminently). EPA officials noted they do not expect a final rule to be released until 2015, at the earliest.

For more information please check out NCSL’s information alert.

Melanie Condon is a NCSL policy associate with the Natural Resources and Infrastructure Committee.

Posted in: NCSL, Public Policy
Actions: E-mail | Permalink |

Subscribe to the NCSL Blog

Click on the RSS feed at left to add the NCSL Blog to your favorite RSS reader. 

Blog Archives | By Category

About the NCSL Blog

This blog offers updates on the National Conference of State Legislatures' research and training, the latest on federalism and the state legislative institution, and posts about state legislators and legislative staff. The blog is edited by NCSL staff and written primarily by NCSL's experts on public policy and the state legislative institution.


Share this: 
NCSL Early Bird Registration
We are the nation's most respected bipartisan organization providing states support, ideas, connections and a strong voice on Capitol Hill.

NCSL Member Toolbox


7700 East First Place
Denver, CO 80230
Tel: 303-364-7700 | Fax: 303-364-7800


444 North Capitol Street, N.W., Suite 515
Washington, D.C. 20001
Tel: 202-624-5400 | Fax: 202-737-1069

Copyright 2015 by National Conference of State Legislatures