On February 17, 2026, ACWA submitted comments to EPA in response to the proposed rule, “Updating the Water Quality Certification Regulations”.
Watersheds Committee
ACWA Request for Extension of Public Comment Period – “Updating the Water Quality Certification Regulations”
On January 20, 2026, ACWA requested that EPA extend the public comment period for the proposed rule, “Updating the Water Quality Certification Regulations”.
ACWA Comment Letter: Updated Definition of Waters of the United States
On January 5, 2026, ACWA submitted comments to EPA and USACE in response to the agencies’ proposed rule, “Updated Definition of Waters of the United States.”
2025 Water Quality Modeling Workshop – Agendas
2025 Water Quality Modeling Workshop – Track Agendas
In re: Clean Water Act Rulemaking
In sum, in light of the lack of reasoned decisionmaking and apparent errors in the rule’s scope of certification, the indications that the rule contravenes the structure and purpose of the Clean Water Act, and that EPA itself has signaled it could not or will not adopt the same rule upon remand, significant doubt exists that EPA correctly promulgated the rule.
Comments on EPA Intent to Revise & Reconsider Sec. 401 Rule
Comments on the agency’s efforts to review and revise the sec. 401 water quality certification rule and encourage the agency to engage in robust coordination with the states through organizations… Read More »
ACWA Comments on Proposal To Reissue and Modify Nationwide Permits
The NWPS are an important part of the regulatory system and enable efficient and effective regulatory review of construction and development activities that have a minimal individual and cumulative adverse environmental impacts. NWPS are permits used by the U.S. Army Corps of Engineers (USACE) to permit a wide range of activities that, upon incorporation of identified conditions and mitigation measures, have been determined to result in minimal adverse effects to the environment. NWPS
are useful for project applicants and states because they streamline the permitting processes necessary for approval. However, the states have several concerns, such as the water quality certification process, removal of the 300 linear foot limit for loss of stream bed and pre-construction notice requirements (PCN) with the changes outlined in the proposal and offer the
following comments.
EPA Governors Letter on WOTUS Meetings
A letter from EPA informing Governors of the opportunity for engagement meetings on the revised Waters of the U.S. proposal.
Clean Water Act Section 401 Final Rule Powerpoint (June 2020)
An EPA presentation on the changes to Section 401 of the Clean Water Act.
ACWA Weekly Wrap Vol. XI, Issue 20 (Week of June 1, 2020)
News EPA Issues Final Rule Revising 401 Regulations This week, the Office of Water released the long-awaited final rule revising the water quality certification process, Clean Water Act Section 401… Read More »
Request for Comment on Clean Water Act Sec. 404 & ESA Consultations
EPA is seeking comment on whether the Agency should reconsider its current position that consultation under ESA Section 7(a)(2) is not required when the EPA approves a State or Tribe’s request to assume the Section 404 dredged and fill permit program under Section 404(h) of the Clean Water Act (CWA).
ACWA Redline Comparison between 2020 Navigable Waters Protection Rule and 2019 Proposed Rule Redefining WOTUS
ACWA used Microsoft Word redlines to compared the 2019 Proposed Rule Redefining “Waters of the United States” to the 2020 final rule defining “Waters of the United States”, known as… Read More »
