The Integrated Report - 303(d) List of Water Quality Limited Segments
and 305(b) Surface Water Quality Assessment

California has integrated the 303(d) List of Impaired Waters and the 305(b) Water Quality Assessment Report into a single report (Integrated Report). This Integrated Report satisfies the requirements of both CWA Sections 303(d) and 305(b).

Section 303(d) of the federal Clean Water Act and 40 CFR §130.7 require states to identify water bodies that do not meet water quality standards and are not supporting their beneficial uses. These waters are placed on the Section 303(d) List of Water Quality Limited Segments (also known as the list of Impaired water bodies). The List identifies the pollutant or stressor causing impairment and establishes a schedule for developing a control plan to address the impairment. Placement on this list generally triggers development of a pollution control plan called a Total Maximum Daily Load (TMDL) for each water body and associated pollutant/stressor on the list. The TMDL serves as the means to attain and maintain water quality standards for the impaired water body.

Section 305(b) of the federal Clean Water Act requires states to report biennially to the USEPA on the water quality conditions of their surface waters. The USEPA then compiles these assessments into their biennial “National Water Quality Inventory Report” to Congress.

If you would like to receive announcements and notices pertaining to the Integrated Report by e-mail, please visit our e-mail subscriptions page.

2018 Integrated Report - 303(d) List & 305(b) Report

On November 3, 2016 the State Water Resources Control Board (State Water Board) released a Notice announcing the beginning of the data and information solicitation period for the 2018 Integrated Report.  Three of the nine Regional Water Boards, including the North Coast Region, will participate in the 2018 Integrated Report development process.

As detailed in the Notice, for the 2018 Integrated Report update data and information must be successfully submitted to the State Water Board via the California Environmental Data Exchange Network (CEDEN), except as noted in Enclosure 1 of the Notice.  All successful submittals to be used for the 2018 Integrated Report must have passed Regional Data Center Review and have been input into CEDEN no later than 5:00 p.m. on Wednesday May 3, 2017.

For complete details on data solicitation and submittal, please see the State Water Board's Notice at the link below.

• Notice of Public Solicitation of Water Quality Data and Information for 2018 California Integrated Reort - Clean Water Act Sections 305(b) and 303(d) – Updated December 9, 2016

2012 Integrated Report - 303(d) List & 305(b) Report

On June 26, 2015, the USEPA approved the North Coast portion of California’s 2012 303(d) List section of the Integrated Report as part of the partial approval/partial disapproval letter.  The USEPA did not make any changes to the 2012 303(d) List of water bodies in the North Coast Region that was approved by State Water Resources Control Board members in April 2015.

• Letter USEPA’s Partial Approval / Partial Disapproval of California’s 2012 303(d) List - June 26, 2015 
• Enclosure: EPA Review of California’s 2012 Section 303(d) List

The 2012 California Integrated Report, fact sheets, and category reports are available on the State Water Board’s website at the link below. NOTE: water bodies in Category 5, 4a, and 4b are considered part of the 303(d) List.

• 2012 California Integrated Report for the Clean Water Act Section 303(d) List & 305(b) Report Website

A list of the 2012 Clean Water Act 303(d) List of Water Quality Limited Segments for the North Coast Region is available at the following link:

• Table of the North Coast Region’s 2012 CWA Section 303(d) List of Water Quality Limited Segments and Status of TMDLs

Additional information on the 2012 Integrated Report for the North Coast Region can be found below.

• North Coast Regional Water Quality Control Board Resolution No. R1-2014-0043 Approving the 303(d) List Portion of the North Coast Region's 2012 Integrated Report for CWA Sections 305(b) and 303(d) - August 14, 2014

• North Coast Region Staff Report for the 2012 Integrated Report for the CWA Section 305(b) Surface Water Quality Assessment and the 303(d) List of Impaired Waters - July 30, 2014
• North Coast Region 2012 Integrated Report Transmittal Letter - September 5, 2014
• State Water Resources Control Board Resolution No. 2015-0021- Approving the 303(d) List Portion of the Proposed 2012 Integrated Report - April 8, 2015
• State Water Resources Control Board Staff Report for the 2012 California Integrated Report - April 8, 2015
• State Water Resources Control Board 2012 Integrated Report Transmittal letter to USEPA - April 24, 2015

Join the Integrated Report – 303(d) List & 305 (b) Report e-mail Notification List

If you would like to receive notices pertaining to Integrated Report – 303(d) List & 305(b) Report by e-mail please visit our e-mail subscriptions page, fill in your name and e-mail address, and check the box titled “Integrated Report - 303(d) List and 305(b) Report”. This will ensure that you receive an e-mail copy of all future notices put out by the North Coast Regional Water Quality Control Board relating to the Integrated Report.

• Email List Subscription Webpage

Contact Information

Katharine Carter
Adaptive Watershed Management Unit
707-576-2290
Katharine.Carter@waterboards.ca.gov