Division of Water Quality
Utah’s Integrated Report
The Clean Water Act (CWA) requires states to submit a biennial, Integrated Report to the Environmental Protection Agency (EPA) on the quality of their surface waters. This report analyzes water quality data to determine if assessed waterbodies support their designated beneficial uses. These beneficial uses include drinking water, recreation, aquatic life, agriculture, and the Great Salt Lake. Waterbodies that do not support one or more of their designated beneficial uses are classified as non-supporting and placed on the CWA 303(d) list of impaired waters. The report guides the development and implementation of water quality plans (Total Maximum Daily Load plans, or TMDLs) that bring impaired waterbodies into compliance with state water quality standards.
Utah’s Integrated Report (IR) fulfills these requirements under the CWA. The report includes:
- Water quality assessment methods used for the report
- Summary of the overall condition of Utah’s waters and significant water quality threats to their beneficial uses (305(b) report).
- Impaired waters that fail to meet water quality standards or are biologically impaired (303(d) list).
The CWA requires a formal public comment period on the IR before submission to the EPA. Upon completion of this comment period, the Division of Water Quality (DWQ) submits the report, public comments, and its response to comments to EPA for approval. EPA reviews the report to ensure that assessments were based on all existing, credible, and readily available data and each assessment is legally and scientifically justified. EPA can approve or deny the 303(d) list.
2026 Integrated Report (EPA Approved)
2026 Development Timeline:
- Call for Data: March 3, 2025 – April 1, 2025
- Public Comment Period: February 2, 2026 – March 3, 2026
- EPA Submission: March 31, 2026
- EPA Approval: June 2, 2026
The EPA has officially approved Utah’s 2026 Integrated Report (EPA Approval Letter). This cycle evaluated data collected between October 1, 2018, and September 30, 2024, assessing over 15,000 miles of rivers and nearly 1.5 million acres of lakes and reservoirs.
2026 Integrated Report Map
Select the assessment unit polygons for draft assessment information. Hover over the layers button to turn on and off assessment category polygons. The “Reset View” button will set the map to its original bounds around the state of Utah. Use the “Search” box to look up assessment units by name or assessment unit ID.
Note: DWQ only assesses monitoring locations situated within the jurisdictional boundaries of the State of Utah. Waterbodies or monitoring sites located on lands under tribal jurisdiction are not included in the assessments.
Integrated Report Archives
Utah's Integrated Report on Water Quality is updated every two years and submitted to EPA for approval. View past reports, data files, public comments, approval letters, and more on the archives page.