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South Dakota Assessment Summary for Reporting Year 2008

Description of this table

	Size of Water
	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Good Waters	3,905.8	65,851.3
Previously impaired waters       now attaining all uses
Threatened Waters	287.0	4,012.0
TMDL completed
TMDL alternative
Non-pollutant impairment
TMDL needed	287.0	4,012.0
Impaired Waters	3,711.5	63,883.2
TMDL completed	36.4	12,240.6
TMDL alternative
Non-pollutant impairment
TMDL needed	3,675.1	51,642.6
New TMDLs completed	364.7	2,351.8
Remaining TMDLs needed	3,310.4	49,290.9
Total Assessed Waters	7,904.2	133,746.5
Total Waters	95,130.0	750,000.0
Percent of Waters Assessed	8.3	17.8

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2008

South Dakota Assessed Waters
Summary of Water Quality Attainment for Rivers and Streams
Reporting Year 2008

Description of this table Assessed Status Miles Assessed 7,904.2 Unassessed 87,225.8 Total Miles 95,130.0

Description of this table Attainment Status Miles Good 3,905.8 Threatened 287.0 Impaired 3,711.5 Total Miles Assessed 7,904.2

Description of this table TMDL Development Status Miles All TMDLs completed 401.1 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 3,597.4 Total Threatened and Impaired 3,998.5

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South Dakota Assessed Waters
Designated Use Support for Rivers and Streams
Reporting Year 2008*

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

Description of this table

Designated Use	Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
					% Threatened
					% Impaired
Coldwater Marginal Fish Life Propagation Waters	225.5	67.5	.0	32.5
Coldwater Permanent Fish Life Propagation Waters	597.3	37.5	4.7	57.8
Commerce And Industry Waters	1,413.9	100.0	.0	.0
Domestic Water Supply Waters	1,884.5	96.4	1.9	1.7
Fish And Wildlife Propagation, Recreation, And Stock Watering Waters	7,870.1	98.1	.7	1.2
Immersion Recreation Waters	2,294.8	77.1	.0	22.9
Irrigation Waters	7,877.4	86.7	4.2	9.1
Limited Contact Recreation Waters	6,367.3	78.1	.2	21.7
Warmwater Marginal Fish Life Propagation Waters	1,610.9	77.2	8.3	14.5
Warmwater Permanent Fish Life Propagation Waters	1,046.7	66.9	.0	33.1
Warmwater Semipermanent Fish Life Propagation Waters	3,219.9	45.4	.0	54.6

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South Dakota Causes of Impairment
for Threatened and Impaired Rivers and Streams
Reporting Year 2008

Description of this table

Cause of Impairment	Cause of Impairment Group	Miles Threatened or Impaired
Total Suspended Solids (TSS)	Turbidity	2,013.3
Fecal Coliform	Pathogens	1,574.2
Temperature, Water	Temperature	519.1
Specific Conductivity	Salinity/Total Dissolved Solids/Chlorides/Sulfates	482.7
Salinity	Salinity/Total Dissolved Solids/Chlorides/Sulfates	454.6
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	188.1
pH	pH/Acidity/Caustic Conditions	176.1
Total Dissolved Solids (TDS)	Salinity/Total Dissolved Solids/Chlorides/Sulfates	127.5
Ammonia, Total	Ammonia	43.0
Nitrates	Nutrients	31.6
Copper	Metals (other than Mercury)	2.1
Cadmium	Metals (other than Mercury)	2.1
Zinc	Metals (other than Mercury)	2.1

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South Dakota Probable Sources of Impairments
for Threatened and Impaired Rivers and Streams
Reporting Year 2008

Description of this table

Probable Source	Probable Source Group	Miles Threatened or Impaired
Livestock (Grazing Or Feeding Operations)	Agriculture	1,749.5
Natural Sources	Natural/Wildlife	1,722.1
Crop Production (Crop Land Or Dry Land)	Agriculture	1,166.4
Grazing In Riparian Or Shoreline Zones	Agriculture	561.2
Wildlife Other Than Waterfowl	Natural/Wildlife	504.5
Animal Feeding Operations (Nps)	Agriculture	466.8
Rangeland Grazing	Agriculture	367.0
Irrigated Crop Production	Agriculture	129.6
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	81.8
Streambank Modifications/Destabilization	Hydromodification	76.5
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Dishcarges/Sewage	76.4
Non-Point Source	Unspecified Nonpoint Source	60.5
Drought-Related Impacts	Natural/Wildlife	38.3
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso)	Municipal Dishcarges/Sewage	19.0
Non-Irrigated Crop Production	Agriculture	16.6
Residential Districts	Urban-Related Runoff/Stormwater	10.0
Industrial Point Source Discharge	Industrial	9.4
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	4.7
Acid Mine Drainage	Resource Extraction	2.1
Impacts From Abandoned Mine Lands (Inactive)	Resource Extraction	2.1
Mine Tailings	Resource Extraction	2.1
Combined Sewer Overflows	Municipal Dishcarges/Sewage	1.5

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South Dakota Assessed Waters
Summary of Water Quality Attainment for Lakes, Reservoirs, and Ponds
Reporting Year 2008

Description of this table Assessed Status Acres Assessed 133,746.5 Unassessed 616,253.5 Total Acres 750,000.0

Description of this table Attainment Status Acres Good 65,851.3 Threatened 4,012.0 Impaired 63,883.2 Total Acres Assessed 133,746.5

Description of this table TMDL Development Status Acres All TMDLs completed 14,592.3 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 53,302.9 Total Threatened and Impaired 67,895.2

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South Dakota Assessed Waters
Designated Use Support for Lakes, Reservoirs, and Ponds
Reporting Year 2008*

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

Description of this table

Designated Use	Acres Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
					% Threatened
					% Impaired
Coldwater Marginal Fish Life Propagation Waters	163.2	96.6	.0	3.4
Coldwater Permanent Fish Life Propagation Waters	1,644.5	71.8	.0	28.2
Domestic Water Supply Waters	13,290.5	67.1	.0	32.9
Fish And Wildlife Propagation, Recreation, And Stock Watering Waters	132,034.5	93.6	6.4	.0
Immersion Recreation Waters	101,544.3	93.7	.0	6.3
Irrigation Waters	43,778.1	88.4	.0	11.6
Limited Contact Recreation Waters	100,083.3	95.1	.0	4.9
Warmwater Marginal Fish Life Propagation Waters	21,397.0	14.4	.0	85.6
Warmwater Permanent Fish Life Propagation Waters	69,448.6	62.9	.2	37.0
Warmwater Semipermanent Fish Life Propagation Waters	37,161.6	71.8	1.0	27.2

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South Dakota Causes of Impairment
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2008

Description of this table

Cause of Impairment	Cause of Impairment Group	Acres Threatened or Impaired
Trophic State Index (TSI)	Nutrients	51,451.2
Total Dissolved Solids (TDS)	Salinity/Total Dissolved Solids/Chlorides/Sulfates	9,383.2
pH	pH/Acidity/Caustic Conditions	7,768.7
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	5,379.7
Salinity	Salinity/Total Dissolved Solids/Chlorides/Sulfates	5,069.9
Chloride	Salinity/Total Dissolved Solids/Chlorides/Sulfates	5,069.9
Sulfates	Salinity/Total Dissolved Solids/Chlorides/Sulfates	4,196.0
Fecal Coliform	Pathogens	1,515.7
Temperature, Water	Temperature	463.6
Sedimentation/Siltation	Sediment	279.2
Mercury	Mercury	206.0
Nitrates	Nutrients	54.6
Selenium	Metals (other than Mercury)	54.6
Specific Conductivity	Salinity/Total Dissolved Solids/Chlorides/Sulfates	54.6

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South Dakota Probable Sources of Impairments
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2008

Description of this table

Probable Source	Probable Source Group	Acres Threatened or Impaired
Non-Point Source	Unspecified Nonpoint Source	51,028.3
Natural Sources	Natural/Wildlife	9,374.6

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South Dakota Causes of Impairment for Reporting Year 2008

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.
Cause of Impairment Group	Size of Assessed Waters with Listed Causes of Impairment
	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Ammonia	43.0
Mercury		206.0
Metals (other than Mercury)	2.1	54.6
Nutrients	31.6	51,451.2
Organic Enrichment/Oxygen Depletion	188.1	5,379.7
Pathogens	1,574.2	1,515.7
pH/Acidity/Caustic Conditions	176.1	7,768.7
Salinity/Total Dissolved Solids/Chlorides/Sulfates	822.9	9,383.2
Sediment		279.2
Temperature	519.1	463.6
Turbidity	2,013.3

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South Dakota Probable Sources Contributing to Impairments
for Reporting Year 2008

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.
Probable Source Group	Size of Assessed Waters with Probable Sources of Impairments
	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Agriculture	2,137.4
Hydromodification	76.5
Industrial	9.4
Municipal Dishcarges/Sewage	159.6
Natural/Wildlife	1,872.7	9,374.6
Resource Extraction	2.1
Unspecified Nonpoint Source	60.5	51,028.3
Urban-Related Runoff/Stormwater	14.6

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South Dakota TMDL Alternatives by Cause of Impairment 2008

No TMDL Alternatives reported.

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South Dakota Previously Impaired Waters Now Attaining All Uses

Description of this table

NOTE: Click on the underlined "Number of Waters Attaining" value for a detailed list of those waters now attaining all uses.
Cycle Attaining	Number of Waters Attaining	Number of Causes of Impairment Addressed
2004	4	4
2008	11	11

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South Dakota 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 of Impairment Group Name	Number of Causes of Impairment Reported
Pathogens	52
Nutrients	40
Salinity/Total Dissolved Solids/Chlorides/Sulfates	35
Turbidity	34
Temperature	27
pH/Acidity/Caustic Conditions	24
Organic Enrichment/Oxygen Depletion	11
Mercury	6
Metals (other than Mercury)	3

Total: 232 Causes of Impairment

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South Dakota 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.
Pollutant	Number of TMDLs	Number of Causes of Impairment Addressed
Ammonia	131	131
Phosphorus	44	71
Fecal Coliform	25	25
Sediment	15	25
Total Suspended Solids (TSS)	13	13
Dissolved Oxygen	9	9
Nutrients	5	7
Biochemical Oxygen Demand (BOD)	3	3
Carbonaceous Bod	3	3
Cyanide	3	3
Cadmium	2	2
Chromium	2	2
Silver	2	2
Zinc	2	2
Arsenic	1	1
Chloride	1	1
Copper	1	1
Fecal	1	1
Lead	1	1
Mercury	1	1
Nitrate	1	1
Nitrogen	1	1
Selenium	1	1
Trend	1	1

Total: 269 TMDLs; 308 Causes of Impairment Addressed

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South Dakota 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
1997	22	22
1998	13	13
1999	42	66
2000	10	10
2001	16	21
2002	23	27
2003	28	32
2004	27	27
2005	20	20
2006	15	15
2007	22	24
2008	26	26
2009	5	5

Total: 269 TMDLs; 308 Causes of Impairment Addressed

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