This layer includes 303 features indicating all assessed polygonal water bodies for the combined 2014 and 2016 Integrated Report. Under Section 303(d) of the Clean Water Act, states, territories and authorized tribes are required to develop a list of water quality limited segments. These waters on the list do not meet water quality standards, even after point sources of pollution have installed the minimum required levels of pollution control technology. The Clean Water Act requires that these jurisdictions establish priority rankings for water on the lists and develop action plans, called as Total Maximum Daily Loads (TMDL), to improve water quality. Every two years, the California State Water Resources Control Board submits a report on the State's water quality to the U.S. Environmental Protection Agency pursuant to Section 305(b) of the federal Clean Water Act. The Report provides water quality information to the general public and serves as the basis for U.S. EPA 's National Water Quality Inventory Report to Congress. This dataset is a compilation of all polygonal water body features in California assessed under Sections 303(d) and 305(b) of the Clean Water Act for the combined 2014 and 2016 Integrated Report listing cycle. Each water body is assigned a unique Water Body ID (WBID) number as well as selected associated information (water body name, Regional Water Quality Control Board number, etc.).

2006 303d List of Water Quality Limited Segments that: 1) Require Total Maximum Daily Loads (TMDLS), 2) Are being addressed by USEPA approved TMDLs 3) Are being addressed by actions other than TMDLs

2006 303d List of Water Quality Limited Segments that: 1) Require Total Maximum Daily Loads (TMDLS), 2) Are being addressed by USEPA approved TMDLs 3) Are being addressed by actions other than TMDLs

2006 303d List of Water Quality Limited Segments that: 1) Require Total Maximum Daily Loads (TMDLS), 2) Are being addressed by USEPA approved TMDLs 3) Are being addressed by actions other than TMDLs

2006 303d List of Water Quality Limited Segments that: 1) Require Total Maximum Daily Loads (TMDLS), 2) Are being addressed by USEPA approved TMDLs 3) Are being addressed by actions other than TMDLs

2006 303d List of Water Quality Limited Segments that: 1) Require Total Maximum Daily Loads (TMDLS), 2) Are being addressed by USEPA approved TMDLs 3) Are being addressed by actions other than TMDLs

Waters identified as impaired from the current approved Clean Water Act 303(d) lists submitted by states.

This is the 2014 Integrated Report. EPA approved this submission in accordance with Sections 303(d), 305(b), and 314(l) of the Clean Water Act, on October 16, 2015. The Integrated Report (IR) combines two water quality reports required under sections 305(b) and 303(d) of the federal Clean Water Act. Section 305(b) requires states, territories and authorized tribes to perform annual water quality assessments to determine the status of jurisdictional waters. Section 303(d) requires states, territories and authorized tribes to identify waters assessed as not meeting water quality standards(see Code of Maryland Regulations 26.08.02). Waters that do not meet standards may require a Total Maximum Daily Load to determine the maximum amount of an impairing substance or pollutant that a particular water body can assimilate and still meet water quality criteria. Historically, the 303(d) List and the 305(b) report were submitted to the Environmental Protection Agency (EPA) as separate documents but more recent guidance has called for combining these two reports into a single biennial publication. More information is available at http://www.mde.state.md.us/PROGRAMS/WATER/TMDL/INTEGRATED303DREPORTS/Pages/Programs/WaterPrograms/TMDL/Maryland%20303%20dlist/index.aspx A searchable version of this data is available at http://www.mde.state.md.us/programs/Water/TMDL/Integrated303dReports/Pages/303d.aspx

Waters identified as impaired as well as their associated causes of impairment from the current approved Clean Water Act 303(d) lists submitted by states.

,The California Water Quality Status Report is an annual data-driven snapshot of the Water Board’s water quality and ecosystem data. This second edition of the report is organized around the watershed from land to sea. Each theme-specific story includes a brief background, a data analysis summary, an overview of management actions, and access to the raw data.,View the 2018 California Water Quality Status Report.,For more information please contact the Office of Information Management and Analysis (OIMA).,