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**• Impaired**  **Waters Listed by State** 

**• Causes of**  **Impairment for 303(d) Listed**  **Waters**

**• Cumulative**  **TMDLs by Pollutant** 

**• Approved**  **TMDLs by State** 

**• Cumulative**  **Number of TMDLs** 

**• Status of**  **Available Data Used in This**  **Report**

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**Depicted below are national summary tables and charts for available water quality data reported by the**  **States to EPA under Section 305(b) and 303(d) of the**

**Clean Water Act.**
**This report displays the most current available**

**reporting year data. Check the**  **Status of Available Data for more** 

**information.** 

# National Summary of Impaired Waters and TMDL Information **Page 1**  **of 9**  **National Summary of Impaired Waters and TMDL Information | Water Quality Ass essme** 

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### Impaired Waters Listed By State
**Description of this table** State Name Number of Waters on 303(d) List **Alabama 220**  **Alaska 35**  **American Samoa 45**  **Arizona 90**  **Arkansas 225**  **California 1,052**  **Colorado 293**  **Connecticut 286**  **Delaware 101**  **District Of Columbia 36**  **Florida 2,292**  **Georgia 242**  **Guam 47**  **Hawaii 352**  **Idaho 741**  **Illinois 1,057**  **Indiana 1,836**  **Iowa 480**  **Kansas 1,372**  **Kentucky 1,433**  **Louisiana 236**  **Maine 113**  **Maryland 337**  **Massachusetts 720**  **Michigan 2,584**  **Minnesota 1,592**  **Mississippi 261**  **Missouri 270**  **Montana 480**  **N. Mariana Islands 24**  **Nebraska 342**  **Nevada 210**  **New Hampshire 1,449**  **New Jersey 710**  **New Mexico 237**  **New York 1,543**  **North Carolina 1,152**  **Page 2** **of 9**  **National Summary of Impaired Waters and TMDL Information | Water Quality Ass essme** 

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** **North Dakota 217**  **Ohio 267**  **Oklahoma 635**  **Oregon 1,397**  **Pennsylvania 6,957**  **Puerto Rico 195**  **Rhode Island 121**  **South Carolina 907**  **South Dakota 166**  **Tennessee 1,012**  **Texas 719**  **Utah 156**  **Vermont 101**  **Virgin Islands 87**  **Virginia 1,490**  **Washington 2,420**  **West Virginia 1,097**  **Wisconsin 663**  **Wyoming 107** 

**Total: 43,209 impaired waters**



### Causes of Impairment for 303(d) Listed Waters

**Description of this table** NOTE: **Click on a cause of impairment (e.g. pathogens) to see the specific state-rep orted causes**  **that are grouped to make up this category. Click on the "Number of Causes of Impairme nt**  **Reported" to see a list of waters with that cause of impairment.** Cause of Impairment Group Name Number of Causes of Impairment Reported **Pathogens 10,676**  **Nutrients 7,902**  **Metals (other than Mercury) 7,060**  **Organic Enrichment/Oxygen Depletion 6,707**  **Sediment 6,466**  **Polychlorinated Biphenyls (PCBs) 6,181**  **Mercury 4,565**  **pH/Acidity/Caustic Conditions 4,318**  **Cause Unknown - Impaired Biota 4,073**  **Temperature 3,127**  **Turbidity 2,912**  **Salinity/Total Dissolved Solids/Chlorides/Sulfates**  **1,911 Page**  **3 of**  **9 National Summary of Impaired Waters and TMDL Information | Water Quality Ass** **essme**

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** **Pesticides 1,796** 

**Algal Growth 1,284**  **Cause Unknown 1,156**  **Habitat Alterations 860**  **Dioxins 561**  **Total Toxics 521**  **Toxic Organics 457**  **Other Cause 453**  **Ammonia 420**  **Toxic Inorganics 373**  **Flow Alteration(s) 210**  **Oil and Grease 189**  **Nuisance Exotic Species 119**  **Taste, Color and Odor 102**  **Fish Consumption Advisory 98**  **Biotoxins 82**  **Trash 70**  **Noxious Aquatic Plants 68**  **Cause Unknown - Fish Kills 64**  **Chlorine 59**  **Radiation 52**  **Nuisance Native Species 4** 
**Total: 74,896 Causes of Impairment**



### National Cumulative TMDLs by Pollutant

**This chart includes TMDLs since October 1, 1995.**

**Description of this table** NOTE: **Click on the underlined "Pollutant Group" value to see a detailed list of pollutants. Click on the underlined**  **"Number of TMDLs" value to see a listing of those TMDLs for the pollutant Group.** 

Pollutant Group Number of TMDLs Number of

Causes of Impairment Addressed **Mercury 21,545**  **21,575 Pathogens**  **13,263 13,572**  **Metals (other than Mercury)**  **9,955 10,153**  **Page 4** **of 9**  **National Summary of Impaired Waters and TMDL Information | Water Quality Ass essme** 

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** **Nutrients 6,154**  **7,520 Sediment**  **3,943 4,593**  **Temperature 2,305**  **2,315 Organic**  **Enrichment/Oxygen Depletion**  **2,191 2,315** 
**pH/Acidity/Caustic Conditions**  **1,958 2,017**  **Salinity/Total Dissolved Solids/Chlorides/Sulfates**  **1,715 1,773**  **Turbidity 1,603**  **1,829 Pesticides**  **1,351 1,514**  **Ammonia 1,131**  **1,230 Polychlorinated Biphenyls**  **(PCBs) 500**  **520**
**Chlorine 335**  **341 Other Cause**  **268 323**  **Toxic Inorganics 206**  **206 Toxic Organics**  **158 199**  **Cause Unknown - Impaired Biota**  **128 132** 
**Total Toxics 120**  **130 Algal Growth**  **95 103**  **Habitat Alterations 83**  **84 Trash**  **75 75**  **Dioxins 27**  **28 Noxious Aquatic Plants**  **21 22**  **Radiation 19**  **22 Oil and Grease**  **14 14**  **Cause Unknown 7**  **7 Nuisance Exotic Species**  **3 6**  **Fish Consumption Advisory**  **2 2** 

**Total: 69,175 TMDLs; 72,620 Causes of Impairment Addressed**



### Approved TMDLs By State

**This chart includes TMDLs since October 1, 1995.**

**Description of this table** NOTE: **Click on the state name to see a state report. Click on the Number of TMDLs to se e a**  **detailed list of the TMDLs. Page**  **5 of**  **9 National Summary of Impaired Waters and TMDL Information | Water Quality Ass** **essme**

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** State Name Number of TMDLs

**Alabama 305**  **Alaska 60**  **American Samoa 43**  **Arizona 88**  **Arkansas 318**  **California 2,013**  **Colorado 1,016**  **Connecticut 407**  **Delaware 581**  **District Of Columbia 385**  **Florida 2,246**  **Georgia 1,700**  **Guam 43**  **Hawaii 65**  **Idaho 2,187**  **Illinois 429**  **Indiana 1,305**  **Iowa 217**  **Kansas 3,335**  **Kentucky 345**  **Louisiana 750**  **Maine 341**  **Maryland 830**  **Massachusetts 607**  **Michigan 238**  **Minnesota 1,802**  **Mississippi 1,440**  **Missouri 288**  **Montana 1,444**  **Nebraska 171**  **Nevada 67**  **New Hampshire 6,055**  **New Jersey 616**  **New Mexico 344**  **New York 719**  **North Carolina 13,443**  **North Dakota 137**  **Ohio 1,761**  **Oklahoma 704**  **Oregon 1,241**  **Pennsylvania 7,152**  **Puerto Rico 321**  **Page 6** **of 9**  **National Summary of Impaired Waters and TMDL Information | Water Quality Ass essme** 

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** **Rhode Island 217** 

**South Carolina 524**  **South Dakota 329**  **Tennessee 1,276**  **Texas 268**  **Utah 319**  **Vermont 119**  **Virgin Islands 66**  **Virginia 1,490**  **Washington 1,500**  **West Virginia 4,867**  **Wisconsin 247**  **Wyoming 394** 
**Total: 69,175 TMDLs**



### National Cumulative Number of TMDLs
**EPA Fiscal Year starts October 1 and ends September 30.**

**Description of this table** NOTE: **Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.** 

Fiscal Year Number of TMDLs Number of Causes of Impairment Addressed **1996 135**  **136 1997**  **337 351**  **1998 402**  **408 1999**  **330 373**  **2000 1,555**  **1,580 2001**  **2,581 2,617**  **2002 2,735**  **2,815 2003**  **3,008 3,281**  **2004 3,392**  **3,650 2005**  **4,319 4,634**  **2006 4,205**  **4,556 2007**  **4,321 4,651**  **2008 9,264**  **9,546 Page**  **7 of**  **9 National Summary of Impaired Waters and TMDL Information | Water Quality Ass** **essme**

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** **2009 4,399**  **4,623 2010**  **2,572 2,708**  **2011 2,830**  **3,113 2012**  **2,883 3,151** 
**2013 15,534**  **15,624**
**2014 3,338**  **3,511 2015**  **946 1,068**  **2016 89**  **224**
**Total: 69,175 TMDLs; 72,620 Causes of Impairment Addressed**



### Status of Available Data Used in This Report

**Description of this table** State Name Assessed Waters Report YearImpaired Waters Report Year **Alabama 2014 2014 Alaska 2010 2010**  **American Samoa 2014 2014 Arizona 2010 2010**  **Arkansas 2008 2008 California 2012 2012**  **Colorado 2012 2012 Connecticut 2014 2014**  **Delaware 2006 2006 District Of Columbia2014 2014**  **Florida 2010 2010 Georgia 2012 2012**  **Guam 2010 2010 Hawaii 2014 2014**  **Idaho 2012 2012 Illinois 2010 2006**  **Indiana 2010 2008 Iowa 2012 2012**  **Kansas 2014 2014 Kentucky 2012 2012**  **Louisiana 2012 2012 Maine 2012 2012**  **Maryland 2012 2012 Massachusetts 2012 2012**  **Michigan 2010 2010 Minnesota 2012 2012**  **Mississippi 2014 2014 Missouri 2014 2014**  **Montana 2014 2014 Page**  **8 of**  **9 National Summary of Impaired Waters and TMDL Information | Water Quality Ass** **essme**

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**1/ 11/** **2016 http://iaspub.epa.gov/waters10/attains_nation_cy.control?p_report_type=T** **N. Mariana Islands 2014 2014**

**Nebraska 2014 2014 Nevada 2012 2012**  **New Hampshire 2010 2010 New Jersey 2012 2012**  **New Mexico 2014 2014 New York 2012 2012**  **North Carolina 2014 2014 North Dakota 2014 2014**  **Ohio 2010 2008 Oklahoma 2014 2014**  **Oregon 2006 2006 Pennsylvania 2006 2004**  **Puerto Rico 2014 2014 Rhode Island 2014 2014**  **South Carolina 2012 2012 South Dakota 2014 2014**  **Tennessee 2012 2012 Texas 2010 2010**  **Utah 2010 2010 Vermont 2014 2014**  **Virgin Islands 2012 2012 Virginia 2014 2012**  **Washington 2008 2008 West Virginia 2010 2010**  **Wisconsin 2006 2008 Wyoming 2012 2012** 

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