Water Protection Program

Missouri Water Quality 305(b) Report

Section 305(b) of the federal Clean Water Act requires each state to report on the status of the waters of the state. The Missouri Water Quality Report fulfills this obligation and is published every two years. The report summarizes water quality issues and judges the degree of progress Missouri has made toward meeting federal Clean Water Act goals. The water quality assessments made in this report will help direct future water quality management efforts to those waters most in need of restoration or protection. This report also includes the list on impaired waters that are in the 303(d) List. See the table below for links to the 305(b) reports.

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Missouri's 303(d) Streams and Lakes

Section 303(d) of the federal Clean Water Act requires that each state identify waters not meeting water quality standards and for which adequate water pollution controls have not been required. Water quality standards protect such beneficial uses of water as whole body contact (such as swimming), maintaining fish and other aquatic life, and providing drinking water for people, livestock and wildlife. The 303(d) List helps state and federal agencies keep track of impaired waters not addressed by normal water pollution control programs.

303(d) List and Listing Methodology Information

Public Availability Session Supporting Documents:

2014 303(d) Impaired Waters List

Proposed 2016 Listing Methodology

Monitoring Data and Mapping Resources

303(d) and 305(b) Reporting Information - Organized by reporting year. A link to the Total Maximum Daily Loads are also included below. Once a TMDL is developed and approved by EPA, the water may be delisted from the 303(d) List.

305(b) Integrated Report Listing Methodology Document EPA Approval Memo EPA Approved 303(d) List 303(d) List Assessment Worksheets EPA Approved 303(d) Delist 303(d) Delist Assessment Worksheets Total Maximum Daily Loads
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2014 WEA
2014 WEA
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Excel versions of these spreadsheets are available upon request by email.

UD = Under Development
PNP = Public Notice Period
WEA = Waiting EPA Approval
-- = Not Available