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On This Page 303(d) Listed Waters for 2012

Data are also available for these cycles:
2002 2004 2006 2008 2010

Waterbody Changes from Prior Cycle

For More Information:

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Mississippi Water Quality Assessment Report

Assessed Waters of Mississippi by Watershed

Select a watershed from the list:
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Search for a waterbody within Mississippi
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Display impaired waters and TMDL information only


NOTE: The data and information provided on this web site may differ from the information provided in the original Mississippi 2012 Section 305(b) Report. This is a result of differences in the way the state's assement database tracks information and how the national data system prepares summary reports. Mississippi's 2012 Section 305(b) Water Quality Report is available via http://deq.state.ms.us/MDEQ.nsf/page/FS_SurfaceWaterQualityAssessments. Information on Mississippi's TMDL program and Section 303(d) list is available via http://deq.state.ms.us/MDEQ.nsf/page/TWB_Total_Maximum_Daily_Load_Section.



Site-specific Targeted Monitoring Summary Results

Mississippi (2012)

Description of this table
 
    1,781.5 24.3
      
   
                     
                     
                     
                     
    3,229.9 36,806.9 2.2
           1,452.4     36,806.9     
                     
                     
           1,777.5          2.2
              129.9     .0     1.4
                    1,647.6                     .8
5,011.4 36,806.9 26.5
84,003.0 500,000.0 245.0
6.0 7.4 10.8

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2012


Site-specific Targeted Monitoring Results

Mississippi Rivers and Streams 2012

Description of this table

All
Rivers and Streams

84,003.0 Miles of Rivers and Streams

Assessed 5,011.4
Unassessed 78,991.6
Total Miles 84,003.0







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Description of this table

Assessed
Rivers and Streams

5,011.4 Miles of
Assessed Rivers and Streams

Good 1,781.5
Threatened .0
Impaired 3,229.9
Total Miles Assessed 5,011.4







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Description of this table

Threatened and Impaired
Rivers and Streams

3,229.9 Miles of
Threatened and Impaired
Rivers and Streams

1,582.3
.0
.0
1,647.6
Total Threatened and Impaired 3,229.9

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Mississippi Rivers and Streams 2012

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table
% Good
% Threatened
% Impaired
Aquatic Life Use Support 4,220.7 39.9 .0 60.1 color.gifcolor.gif
Fish Consumption 414.3 .0 .0 100.0 color.gif
Primary Contact Recreation 431.3 49.9 .0 50.1 color.gifcolor.gif
Secondary Contact Recreation 161.1 18.2 .0 81.8 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Mississippi Rivers and Streams 2012

Description of this table
Biological Impairment Cause Unknown - Impaired Biota color.gif 1,532.4
Sedimentation/Siltation Sediment color.gif 718.0
Fecal Coliform Pathogens color.gif 347.8
Mercury in Fish Tissue Mercury color.gif 276.4
Organic Enrichment/Low Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 219.8
Phosphorus Nutrients color.gif 184.6
Nitrogen Nutrients color.gif 154.5
pH pH/Acidity/Caustic Conditions color.gif 138.8
DDT in Fish Tissue Pesticides color.gif 127.1
Toxaphene Pesticides color.gif 127.1
Nutrients Nutrients color.gif 115.3
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 69.0
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 50.7
Carbonaceous Bod (CBOD) Organic Enrichment/Oxygen Depletion color.gif 45.7
Ammonia, Un-ionized Ammonia color.gif 10.9
Conductivity Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 7.0
Cadmium Metals (other than Mercury) color.gif 3.2
Lead Metals (other than Mercury) color.gif 3.2

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Site-specific Targeted Monitoring Results

Probable Sources
Mississippi Rivers and Streams 2012

Description of this table
Unknown Source Unknown color.gif 3,220.7
Industrial Point Sources Industrial color.gif 3.2

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Site-specific Targeted Monitoring Results

Mississippi Lakes, Reservoirs, and Ponds 2012

Description of this table

All
Lakes, Reservoirs, and Ponds

500,000.0 Acres of Lakes, Reservoirs, and Ponds

Assessed 36,806.9
Unassessed 463,193.1
Total Acres 500,000.0







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

36,806.9 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good .0
Threatened .0
Impaired 36,806.9
Total Acres Assessed 36,806.9







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Description of this table

Threatened and Impaired
Lakes, Reservoirs, and Ponds

36,806.9 Acres of
Threatened and Impaired
Lakes, Reservoirs, and Ponds

36,806.9
.0
.0
.0
Total Threatened and Impaired 36,806.9

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Mississippi Lakes, Reservoirs, and Ponds 2012

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table
% Good
% Threatened
% Impaired
Fish Consumption 36,806.9 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Mississippi Lakes, Reservoirs, and Ponds 2012

Description of this table
Mercury in Fish Tissue Mercury color.gif 35,049.6
Toxaphene Pesticides color.gif 1,757.3
DDT in Fish Tissue Pesticides color.gif 1,757.3

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Site-specific Targeted Monitoring Results

Probable Sources
Mississippi Lakes, Reservoirs, and Ponds 2012

Description of this table
Unknown Source Unknown color.gif 36,806.9

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Site-specific Targeted Monitoring Results

Mississippi Coastal Shoreline 2012

Description of this table

All
Coastal Shoreline

245.0 Miles of Coastal Shoreline

Assessed 26.5
Unassessed 218.5
Total Miles 245.0







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Description of this table

Assessed
Coastal Shoreline

26.5 Miles of
Assessed Coastal Shoreline

Good 24.3
Threatened .0
Impaired 2.2
Total Miles Assessed 26.5







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Description of this table

Threatened and Impaired
Coastal Shoreline

2.2 Miles of
Threatened and Impaired
Coastal Shoreline

1.4
.0
.0
.8
Total Threatened and Impaired 2.2

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Mississippi Coastal Shoreline 2012

* Waters assessed for more than one designated use are included in multiple designated use groups below.

Description of this table
% Good
% Threatened
% Impaired
Aquatic Life Use Support .8 .0 .0 100.0 color.gif
Primary Contact Recreation 26.5 91.8 .0 8.2 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Mississippi Coastal Shoreline 2012

Description of this table
Enterococcus Bacteria Pathogens color.gif 2.2
Nitrogen Nutrients color.gif .8

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Site-specific Targeted Monitoring Results

Probable Sources
Mississippi Coastal Shoreline 2012

Description of this table
Unknown Source Unknown color.gif 2.2

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Mississippi Causes of Impairment for Reporting Year 2012


Description of this table
NOTE: Click on the underlined Cause of Impairment Group to see a list of specific state causes of impairment making up the Cause of Impairment Group. See also Pollution categories summary document (PDF) (20 pp, 557K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Ammonia 10.9
Cause Unknown - Impaired Biota 1,532.4
Mercury 276.4 35,049.6
Metals (other than Mercury) 3.2
Nutrients 295.9 .8
Organic Enrichment/Oxygen Depletion 316.2
Pathogens 347.8 2.2
Pesticides 127.1 1,757.3
pH/Acidity/Caustic Conditions 138.8
Polychlorinated Biphenyls (PCBs) 50.7
Salinity/Total Dissolved Solids/Chlorides/Sulfates 7.0
Sediment 718.0

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Mississippi Probable Sources Contributing to Impairments
for Reporting Year 2012

Description of this table
NOTE: Click on the underlined Probable Source Group to see a list of specific state Probable Sources making up the Probable Source Group.
Size of Assessed Waters with Probable Sources of Impairments
Industrial 3.2
Unknown 3,220.7 36,806.9 2.2

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Mississippi TMDL Alternatives by Cause of Impairment 2012


No TMDL Alternatives reported.

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Mississippi Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards

Description of this table
NOTE: Click on the underlined "Number of Waters Attaining" value for a detailed list of those previously 303(d)-listed waters now attaining all applicable water quality standards.
2005 color.gif 21 27
2007 color.gif 35 55
2008 color.gif 3 3

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Mississippi 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-reported causes that are grouped to make up this category. Click on the "Number of Causes of Impairment Reported" to see a list of waters with that cause of impairment.
Cause Unknown - Impaired Biota color.gif 197
Nutrients color.gif 13
pH/Acidity/Caustic Conditions color.gif 12
Organic Enrichment/Oxygen Depletion color.gif 9
Pathogens color.gif 7
Metals (other than Mercury) color.gif 2
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 1

Total: 241 Causes of Impairment

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Mississippi Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Pollutant" value to see associated listed waters for which a TMDL was developed. Click on the underlined "Number of TMDLs" value to see a listing of those TMDLs for the pollutant.
Number of Causes of
Impairment Addressed
Fecal Coliform color.gif 209 210
Siltation color.gif 200 201
Toxaphene color.gif 153 155
Biochemical Oxygen Demand (BOD) color.gif 150 181
DDT color.gif 148 148
Phosphorus, Total color.gif 145 148
Nitrogen, Total color.gif 138 141
Sediment color.gif 131 135
Ammonia, Un-ionized color.gif 32 33
Mercury color.gif 28 28
Toxicity color.gif 14 16
Escherichia Coli (E. Coli) color.gif 13 13
Carbonaceous Bod (CBOD) color.gif 10 10
Chronic Toxicity color.gif 8 14
Organic Enrichment/Low Dissolved Oxygen color.gif 7 7
Low pH color.gif 6 6
pH color.gif 6 6
Nutrients color.gif 5 5
Sedimentation/Siltation color.gif 5 5
Conductivity color.gif 4 4
Phenol color.gif 4 5
Ammonia Nitrogen color.gif 3 3
Polychlorinated Biphenyls (PCBs) color.gif 3 3
Total Toxics color.gif 3 3
4,4'-DDT color.gif 1 1
Acute Toxicity color.gif 1 1
Aluminum color.gif 1 1
Cadmium color.gif 1 1
Carbofuran color.gif 1 1
Chlorine color.gif 1 1
Dioxin color.gif 1 1
Dissolved Oxygen color.gif 1 1
Lead color.gif 1 1
Nitrogenous BOD (NBOD) color.gif 1 1
Oil and Grease color.gif 1 1
Pathogens color.gif 1 1
Pentachlorophenol (PCP) color.gif 1 1

Total: 1,438 TMDLs; 1,493 Causes of Impairment Addressed


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Mississippi 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.
1999