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Water Quality

Water Quality Assessment

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Oregon's 2010 Integrated Report

DEQ assessed water quality in Oregon to meet the federal Clean Water Act Sections 305(b) and 303(d) requirements to provide an Integrated Report on Oregon’s surface waters. DEQ prepared Oregon’s 2010 Integrated Report in phases and submitted a final 2010 Integrated Report to EPA in May 2011.

EPA approved the submitted 303(d) listings and de-listings on March 15, 2012 but also disapproved DEQ’s overall submittal for not including other waters. EPA proposed additions to Oregon’s 2010 303(d) list and took public comment on the additional listings. EPA completed its process and took final action on Oregon’s 2010 303(d) list on Dec. 14, 2012 by adding 870 listed segments.

With EPA’s action, the listings/de-listings approved in March 2012 and listings added in December 2012 complete Oregon’s 303(d) list and the list can be used for Clean Water Act purposes.

See below for links to database reports and documents for the 2010 Integrated Report and 303(d) list. For additional information, contact Karla Urbanowicz at DEQ, Portland, at 503-229-6099 (toll free in Oregon at 800-452-4011, ext. 6099) or by email.

2010 Integrated Report

Assessment information available for the 2010 Integrated Report includes:

Oregon's 2010 Integrated Report – Assessment Database and 303(d) List
A searchable database report with data for each water body, pollutant and location that have been assessed, and the conclusion about water quality in each water body.

Search options to display data including:

  • All waters in the state for all pollutants and conditions
  • Waters that are Water Quality Limited (Category 4 and Category 5)
  • Waters where pollutant Total Maximum Daily Loads (TMDLs) need to be developed (Category 5 303(d) list)
  • Waters that have been de-listed and removed from Category 5 (303(d) list) in the 2010 assessment

EPA action on Oregon’s 2010 303(d) List

EPA final additions to Oregon's 2010 303(d) list letter, Dec. 2012 (this link redirects to the EPA website)

DEQ’s comments on EPA’s proposed 303(d) additions, April 2012

EPA approval/disapproval action, March 2012 (this link redirects to the EPA website)

Other Information

Methodology for Oregon’s 2010 Water Quality Report and List of Water Quality Limited Waters (May 2011)
The methodology contains the protocols and decision rules DEQ used to evaluate data and assign an assessment status category to each water body where data were reviewed.

Oregon’s TMDL Priorities and Schedule (May 2011)

Response to Comments on Oregon’s Draft 2010 Integrated Report (Jan. 2011)

Response to Comments on Final Supplement to Oregon’s 2010 Integrated Report (May 2011)

Call for Data - Closed June 2009

[print version]

For more information about DEQ's Integrated Report and 303(d) list contact Karla Urbanowicz by phone at (503) 229-6099 or by e-mail.

Oregon Department of Environmental Quality
Headquarters: 811 SW Sixth Ave., Portland, OR 97204-1390
Phone: 503-229-5696 or toll free in Oregon 1-800-452-4011
Oregon Telecommunications Relay Service: 1-800-735-2900  FAX: 503-229-6124

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the State of Oregon and the Environmental Protection Agency.

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