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Water Quality

Past Integrated Reports

2012 Integrated Report - Search

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The Integrated Report Assessment Database contains information on water quality in Oregon's surface waters and includes waters identified as water quality limited that need TMDLs (Category 5: Section 303(d) list). The database contains assessment information submitted to EPA in November 2014.

EPA approved most of the submitted 303(d) listings and delistings in December 2016. See EPA's website for details on what was approved and disapproved. The approved 303(d) list with EPA's modifications is currently effective for Oregon. DEQ will update the searchable database when EPA has completed final action to add other impaired waters to Oregon's 303(d) list.

The 2012 Integrated Report Assessment Database contains new assessment information and updates to assessments from 1998, 2002, 2004, and 2010. (See 2010 Integrated Report Database). The updates made in 2012 are described in the "2012 Assessment Action" report field. If no new data evaluations or assessments are done in 2012, the assessment information and the status assigned in previous assessments are carried forward into the 2012 Integrated Report and noted as "No Action".

Information for each record in the assessment database includes:

  • Basin Name - Name of USGS 3rd level hydrologic unit.
  • Subbasin, 4th Field HUC - Name and Hydrologic Unit Codes (HUC 8-digit code) of USGS 4th level hydrologic unit.
  • Record ID - An identifier for a unique combination of waterbody location, pollutant parameter, and season.
  • Waterbody Information -
    • Name - Name of waterbody from Geographic Information System if available
    • LLID - Georeferenced identifier derived from the latitude/longitude at the mouth of the stream line or center of river or lake.
    • River Miles - Starting and ending point of assessment unit in river miles from georeferenced location information. RM 0 is at the mouth of the stream, or center of a lake/reservoir.
    • Segment Miles - Total miles in the assessment unit that represents a segment on a stream.
    • Beach Name - Beach name used for reporting to EPA.
    • Beach ID - Beach identifier used for reporting to EPA.
  • Pollutant - A pollutant or condition that may impair water quality and has an Oregon water quality standard.
  • Season - The season, such as Summer or Fall Winter Spring, or a time period when the pollutant or impairment may be present.
  • Criteria - Summary of Oregon water quality criteria for the pollutant.
  • Beneficial Use - Beneficial use protected by the water quality standard.
  • Status - An assessment category assigned to each record based on evaluating water quality information using the assessment methodology decision rules.
    • Category 1: All standards are met. (This category is not used.)
    • Category 2: Attaining - Specific water quality standards are met.
    • Category 3: Insufficient data to determine whether a standard is met.
      • 3B: Potential concern - Some data indicate non-attainment of a criterion, but data are insufficient to assign another category.
    • Category 4: Water is water quality limited but a TMDL is not needed. This includes:
      • 4A: TMDL approved - TMDLs needed to attain applicable water quality standards have been approved.
      • 4B: Other pollution control requirements are expected to address all pollutants and will attain water quality standards.
      • 4C: Impairment is not caused by a pollutant (e.g., flow or lack of flow is not considered a pollutant.)
    • Category 5: Water is water quality limited and a TMDL is needed, Section 303(d) list.
  • 2012 Assessment Action - Any new assessment action taken in 2012 after evaluating new data or information.
  • Supporting Data - Summary of data and/or information evaluated for the assessment.

Search criteria options:

  • Full report - Use the default "All" selections. (The report may take a while to load as there are almost 20,000 records.)
  • Limited report - Select by Subbasin (4th Field Hydrologic Unit Code (HUC)), Waterbody (Stream/Lake), LLID, pollutant, and/or Listing Status from the dropdown lists.
  • Water quality limited waterbodies (Appendix A) - Select a category 4 or 5 Listing Status.
  • 2012 303(d) list - Select Listing Status: "Water Quality Limited TMDL needed - 303(d)". Includes only Category 5, 303(d).
  • Delisted waters - Click the checkbox for "Waterbodies delisted in 2012". Search may be for all delisted waterbodies, or be limited by Subbasin, Waterbody, and/or Pollutant Parameter.

NOTE: Large rivers (Willamette River, Columbia River, Deschutes River, etc.) and large assessment units may be in more than one subbasin (4th Field HUC). Search by waterbody name to find ALL the assessments on large waters. Searching by subbasin names will return any assessment unit contained in or crossing that 4th field HUC. (Example: "Alsea" returns 439 records.) Searching by combined subbasin names will return only the assessment segments that are in all those 4th field HUCs. (Example: "Alsea; Siuslaw" returns 2 records.)

Sorting and counting options:

  • Click on the active headings (Subbasin, Waterbody, Pollutant, Season, Criteria) to re-sort the search results in alphanumeric order.
  • Click on "Show All Records" to show the count of records in the search in the "Records per page" box.

Searching result options:

  • Click the "Search" button to view results on screen.
  • Use the quick filter or type "Ctrl+F" to find specific text in the search results.
  • Click box for "download spreadsheet" to create a Comma Separated Values (CSV) file of search results that can be viewed using Microsoft Excel or saved.