Missouri Water Quality
Missouri Water Quality 305(b) Report
Under Section 303(d), 305(b) and 314 of the Clean Water Act each state is required to report to the U.S. Environmental Protection Agency (EPA) on the status of their state waters on April 1 every even numbered year. The information provided by the states in their 305(b) integrated report are combined into one National Water Quality Inventory Report to Congress. The report and other information are available from EPA's electronic reporting database (ATTAINS). This is the primary way for EPA to report the general status of water quality conditions to Congress and the public.
The Missouri 305(b) Integrated Report provides an overview of the status of Missouri's waters. This water quality report fulfills EPA's reporting obligation. 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 of impaired waters that are in the 303(d) List. See the table below for links to Missouri's 305(b) integrated report submittals.
Missouri's 303(d) Streams and Lakes
The goal of the Clean Water Act is (33 U.S.C. §1251(a)) "to restore and maintain the chemical, physical, and biological integrity of the Nation's waters." 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. See the table below for links to Missouri's 303(d) List of impaired waterbodies.
Missouri's Monitoring and Assessment Program
Under Section 106(e)(1) of the Clean Water Act, EPA provides monitoring support to eligible state monitoring programs. The Elements of a State Water Monitoring and Assessment Program recommends 10 elements of a state water monitoring and assessment program.. These elements, in addition to Missouri's proposed monitoring strategy, are described in A Proposal for a Water Quality Monitoring Strategy for Missouri. In addition to a biennial submittal of a 303(d) List of impaired waterbodies to EPA, the state must also provide written methodology describing their approach for considering and evaluating existing and readily available data and information used to develop their 303(d) List of impaired waterbodies. See the table below for links to Missouri's Listing Methodology Document submittals.
Biennial Reporting Requirements
2018 303(d) List
The public notice for the 2018 303(d) List of Impaired Waters was originally published on June 30, 2017. Because the notice was only published in five regional newspapers instead of the required six newspapers, the department is republishing the notice and holding two more public meetings, with the public comment period scheduled for April 24, 2018 through July 23, 2018. The public hearing will be held on July 16, 2018, at the Clean Water Commission meeting. See the Upcoming Meetings Section for more information on meeting dates, times and location.
Second Public Notice Period April 24, 2018 - July 23, 2018
First Public Notice Period July 1, 2017 - Oct. 13, 2017
- 2018 303(d) List of Impaired Waters
- 2018 303(d) Public Comments July 1, 2017 - Oct. 13, 2017
- 2018 303(d) Response to Public Comments July 1, 2017 - Oct. 13, 2017
- 2020 Listing Methodology Document Public Comments July 1, 2017 - Oct. 13, 2017
- 2020 Listing Methodology Document Response to Public Comments July 1, 2017 - Oct. 13, 2017
May 24, 2018 - 2018 303(d) List of Impaired Waters and 2020 Listing Methodology Document
9 a.m. - 3 p.m.
Lewis and Clark State Office Building
May 10, 2018 - 2018 303(d) List of Impaired Waters and 2020 Listing Methodology Document
303(d) Listing Methodology Document Meeting Summary
2020 Draft Listing Methodology Document as of May 10, 2018
March 9, 2018 - TMDL Priority and 2020 Listing Methodology Document Third Stakeholder Meeting
2020 Listing Methodology Document March 9, 2018 DRAFT with Updates
2020 Listing Methodology Document Session Video
Kleekamp Thesis - Streams in a Changing Landscape: Identifying Candidate Reference Reaches to Assess the Physical and Biotic Integrity of Missouri's Wadeable Streams
Development of Reference Reaches for Missouri Streams
Candidate Headwater Reference Segments Shapefile
Feb. 5, 2018 - TMDL Priority and 2020 Listing Methodology Document Second Stakeholder Meeting
2020 Listing Methodology Document Feb. 5, 2018 DRAFT With Updates
TMDL Priority and 2020 Listing Methodology Document Session Video - Part 1
TMDL Priority and 2020 Listing Methodology Document Session Video - Part 2
Jan. 18, 2018 - TMDL Priority and 2020 Listing Methodology Document Meeting
Listing Methodology Document Public Meeting Summary
Category 5 - Alternative Documentation Checklist - DRAFT
TMDL Priority Session Video
2020 Listing Methodology Document Session Video
TMDL Priority Session Attendance Sheets
2020 Listing Methodology Document Session Attendance Sheets
2020 Listing Methodology Document Session Attachments
Oct. 4, 2017 - Clean Water Commission Meeting
A Public Hearing for both the Draft 2018 Missouri Section 303(d) List and the Draft 2020 Missouri Listing Methodology Document was conducted at this Clean Water Commission meeting.
May 9, 2017 - Biological Workgroup Meeting-focus on the assessment of sediments for metals and organics
Missouri 2018 Section 303(d) Impaired Waters Public Notice and Hearing Schedule
Solicitation Request for Readily Available and Qualified Water Quality Data
2018 Integrated Reporting Cycle
Monitoring Information and Mapping Resources
Water Quality Monitoring Data Search-Access this link for water quality data used for 303(d) Listings
Water Quality Data Source
Environmental Services Program Reports and Database-Access this link for biological data used for 303(d) Listings
Geographic Information Systems (GIS)
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|
|2018 UD||2018||2018 PNP||2018 PNP||2018 PNP||2018 PNP|
|2014||2014||2014||2014||2014||2014||2014||What are TMDLs?|
|2012||2012||2012||2012||2012||2012||2012||EPA approved TMDLs|
|2010||2010||2010||2010||2010||2010||2010||TMDLs under development|
Excel versions of these spreadsheets are available upon request by email.
P = Partial
F - Final
UD = Under Development
PNP = Public Notice Period
CWC = Waiting Clean Water Commission Approval
WEA = Waiting EPA Approval
-- = Not Available