Water Quality Standards Regulations: North Dakota
Presented are water quality standards in effect for Clean Water Act (CWA) purposes for this state.
The EPA is posting these standards as a convenience to users and has made a reasonable effort to assure their accuracy. For each document listed under "State Standards in Effect for CWA Purposes", the EPA has made a reasonable effort to identify parts of the standards that are disapproved or are otherwise not in effect for CWA purposes. Additionally, please note the documents may also contain provisions that the EPA does not have the authority and duty to act on under the Clean Water Act because the provisions are not water quality standards.
On this page:
State Standards in Effect for CWA Purposes
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Standards of Water Quality for North Dakota (pdf)
(Effective March 4, 2024) Surface water quality standards for North Dakota. Please note that not all provisions of this document are effective for CWA purposes (refer to cover letter for more information).
Action Letters on State WQS Submissions
- EPA Action on Amendments to North Dakota's Standards of Quality for Waters of the State (pdf)
- EPA Action on ND's Revised Chronic Aquatic Life Criterion for Mercury (pdf)
- EPA Action Action on Revisions to Standards of Quality for Waters of the State (pdf)
- EPA Action on Revisions to Standards of Water Quality of the State (pdf)
- EPA Action on Revisions to Standards of Water Quality of the State (pdf)
- EPA partial action on revisions to Standards of Quality for Waters of the State (pdf)
- Approval of 2006 Triennial Revisions (pdf)
- Action Letter for 04-05-01 Submission - Triennial Review (pdf)
Note: If you need assistance reading the action letters, contact Mario Sengco on (202) 566-2676.
Federally Proposed or Promulgated Standards
- None at this time.