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 2014 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 2014 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 (2014)

Description of this table
 
    1,788.7 61,381.9 27.2
       160.3
   
                     
                     
                     
                     
    3,739.8 46,470.1 .8
           1,709.5     41,000.0     
                     
                     
           2,013.6     5,470.1     .8
              .0     .0     .0
                    2,013.6           5,470.1           .8
5,528.5 107,852.0 27.9
84,003.0 500,000.0 245.0
6.6 21.6 11.4

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2014


Site-specific Targeted Monitoring Results

Mississippi Rivers and Streams 2014

Description of this table

All
Rivers and Streams

84,003.0 Miles of Rivers and Streams

Assessed 5,528.5
Unassessed 78,474.5
Total Miles 84,003.0







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Description of this table

Assessed
Rivers and Streams

5,528.5 Miles of
Assessed Rivers and Streams

Good 1,788.7
Threatened .0
Impaired 3,739.8
Total Miles Assessed 5,528.5







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Description of this table

Threatened and Impaired
Rivers and Streams

3,739.8 Miles of
Threatened and Impaired
Rivers and Streams

1,709.5
.0
.0
2,013.6
Total Threatened and Impaired 3,739.8

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Mississippi Rivers and Streams 2014

* 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 Support 4,389.8 41.7 .0 58.3 color.gifcolor.gif
Aquatic Life Use Support 405.2 .0 .0 100.0 color.gif
Fish Consumption 414.3 .0 .0 100.0 color.gif
Primary Contact (Recr) 404.4 17.1 .0 82.9 color.gifcolor.gif
Primary Contact Recreation 42.5 .0 .0 100.0 color.gif
Secondary Contact 156.9 30.0 .0 70.0 color.gifcolor.gif
Secondary Contact Recreation 25.2 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Mississippi Rivers and Streams 2014

Description of this table
Biological Impairment Cause Unknown - Impaired Biota color.gif 1,817.8
Sedimentation/Siltation Sediment color.gif 820.5
Fecal Coliform Pathogens color.gif 506.3
Phosphorus Nutrients color.gif 285.4
Mercury in Fish Tissue Mercury color.gif 276.4
Nitrogen Nutrients color.gif 255.4
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 224.6
pH pH/Acidity/Caustic Conditions color.gif 142.7
Organic Enrichment/Low Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 142.4
Toxaphene Pesticides color.gif 127.1
DDT in Fish Tissue Pesticides color.gif 124.5
Nutrients Nutrients color.gif 69.7
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 50.7
Carbonaceous Bod (CBOD) Organic Enrichment/Oxygen Depletion color.gif 46.5
Ammonia, Un-ionized Ammonia color.gif 26.4
Total Organic Carbon (TOC) Organic Enrichment/Oxygen Depletion color.gif 26.4
Chemical Oxygen Demand (COD) Organic Enrichment/Oxygen Depletion color.gif 25.0
Phosphorus, Total Nutrients color.gif 14.1
Conductivity Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 7.0
Temperature Temperature color.gif 5.5
Lead Metals (other than Mercury) color.gif 3.2
Cadmium Metals (other than Mercury) color.gif 3.2
DDT Pesticides color.gif 2.7

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Site-specific Targeted Monitoring Results

Probable Sources
Mississippi Rivers and Streams 2014

Description of this table
Unknown Source Unknown color.gif 3,748.0
Industrial Point Sources Industrial color.gif 3.2

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Site-specific Targeted Monitoring Results

Mississippi Lakes, Reservoirs, and Ponds 2014

Description of this table

All
Lakes, Reservoirs, and Ponds

500,000.0 Acres of Lakes, Reservoirs, and Ponds

Assessed 107,852.0
Unassessed 392,148.0
Total Acres 500,000.0







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Description of this table

Assessed
Lakes, Reservoirs, and Ponds

107,852.0 Acres of
Assessed Lakes, Reservoirs, and Ponds

Good 61,381.9
Threatened .0
Impaired 46,470.1
Total Acres Assessed 107,852.0







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Description of this table

Threatened and Impaired
Lakes, Reservoirs, and Ponds

46,470.1 Acres of
Threatened and Impaired
Lakes, Reservoirs, and Ponds

41,000.0
.0
.0
5,470.1
Total Threatened and Impaired 46,470.1

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Mississippi Lakes, Reservoirs, and Ponds 2014

* 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 Support 100,352.2 90.2 .0 9.8 color.gifcolor.gif
Fish Consumption 36,641.3 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Mississippi Lakes, Reservoirs, and Ponds 2014

Description of this table
Mercury in Fish Tissue Mercury color.gif 35,049.8
Phosphorus Nutrients color.gif 8,834.9
Organic Enrichment/Low Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 5,470.1
Nitrogen Nutrients color.gif 4,358.8
Biochemical Oxygen Demand (BOD) Organic Enrichment/Oxygen Depletion color.gif 3,718.6
Toxaphene Pesticides color.gif 1,591.5
DDT in Fish Tissue Pesticides color.gif 1,591.5

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Site-specific Targeted Monitoring Results

Probable Sources
Mississippi Lakes, Reservoirs, and Ponds 2014

Description of this table
Unknown Source Unknown color.gif 46,470.1

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Site-specific Targeted Monitoring Results

Mississippi Coastal Shoreline 2014

Description of this table

All
Coastal Shoreline

245.0 Miles of Coastal Shoreline

Assessed 27.9
Unassessed 217.1
Total Miles 245.0







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Description of this table

Assessed
Coastal Shoreline

27.9 Miles of
Assessed Coastal Shoreline

Good 27.2
Threatened .0
Impaired .8
Total Miles Assessed 27.9







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Description of this table

Threatened and Impaired
Coastal Shoreline

.8 Miles of
Threatened and Impaired
Coastal Shoreline

.0
.0
.0
.8
Total Threatened and Impaired .8

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Mississippi Coastal Shoreline 2014

* 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 Support .8 .0 .0 100.0 color.gif
Primary Contact (Recr) 27.9 97.3 .0 2.7 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Mississippi Coastal Shoreline 2014

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

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Site-specific Targeted Monitoring Results

Probable Sources
Mississippi Coastal Shoreline 2014

Description of this table
Unknown Source Unknown color.gif .8

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Mississippi Causes of Impairment for Reporting Year 2014


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, 557 K, About PDF) for brief, non-technical descriptions of general cause categories.
Size of Assessed Waters with Listed Causes of Impairment
Ammonia 26.4
Cause Unknown - Impaired Biota 1,817.8
Mercury 276.4 35,049.8
Metals (other than Mercury) 3.2
Nutrients 365.2 8,834.9 .8
Organic Enrichment/Oxygen Depletion 435.2 9,188.7
Pathogens 506.3 .8
Pesticides 127.1 1,591.5
pH/Acidity/Caustic Conditions 142.7
Polychlorinated Biphenyls (PCBs) 50.7
Salinity/Total Dissolved Solids/Chlorides/Sulfates 7.0
Sediment 820.5
Temperature 5.5

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Mississippi Probable Sources Contributing to Impairments
for Reporting Year 2014

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 3,748.0 46,470.1 .8

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Mississippi TMDL Alternatives by Cause of Impairment 2014


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
2013 color.gif 2 2
2014 color.gif 8 8

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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 236
Nutrients color.gif 16
Organic Enrichment/Oxygen Depletion color.gif 14
pH/Acidity/Caustic Conditions color.gif 9
Sediment color.gif 1
Pathogens color.gif 1
Temperature color.gif 1

Total: 278 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
Sedimentation/Siltation color.gif 7 7
Low pH color.gif 6 6
pH color.gif 6 6
Nutrients 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: 1,440 TMDLs; 1,495 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 color.gif 1 1
2000 color.gif 78 79
2001 color.gif 45 52
2002 color.gif 28 29
2003 color.gif 194 221
2004 color.gif 35 37
2005 color.gif 56 60
2006 color.gif 251 253
2007 color.gif 168 170
2008 color.gif 361 370
2009 color.gif 144 144
2010 color.gif 23 23
2011 color.gif 25 25
2012 color.gif 13 13
2013 color.gif 12 12
2014 color.gif 6 6

Total: 1,440 TMDLs; 1,495 Causes of Impairment Addressed

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TMDL Document Search


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