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North 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	47,669.3	190,406.7
Previously impaired waters       now attaining all uses	455.1
Threatened Waters	4,199.9	18,244.7
TMDL completed	77.3	3,188.8
TMDL alternative
Non-pollutant impairment	231.0
TMDL needed	3,891.7	15,055.9
Impaired Waters	2,737.0	491,566.8
TMDL completed		135.0
TMDL alternative
Non-pollutant impairment	15.0
TMDL needed	2,722.0	491,431.8
New TMDLs completed	375.5	346.6
Remaining TMDLs needed	2,346.5	491,085.2
Total Assessed Waters	54,606.2	700,218.2
Total Waters	54,607.0	714,910.0
Percent of Waters Assessed	100.0	97.9

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

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

Description of this table Assessed Status Miles Assessed 54,606.2 Unassessed .8 Total Miles 54,607.0

Description of this table Attainment Status Miles Good 47,669.3 Threatened 4,199.9 Impaired 2,737.0 Total Miles Assessed 54,606.2

Description of this table TMDL Development Status Miles All TMDLs completed 452.8 TMDL alternative .0 Non-pollutant impairment 246.0 TMDL needed 6,238.1 Total Threatened and Impaired 6,936.9

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North 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
Agricultural	54,606.2	100.0	.0	.0
Fish And Other Aquatic Biota	4,764.4	33.8	50.2	16.0
Fish Consumption	401.5	.0	.0	100.0
Industrial	54,606.2	100.0	.0	.0
Municipal And Domestic	1,737.5	95.1	4.9	.0
Recreation	6,617.0	23.2	50.8	26.0

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North 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
Fecal Coliform	Pathogens	4,969.0
Physical Substrate Habitat Alterations	Habitat Alterations	2,525.1
Sedimentation/Siltation	Sediment	1,783.1
Fish Bioassessments	Cause Unknown - Impaired Biota	492.3
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	461.7
Methylmercury	Mercury	401.5
Benthic Macroinvertebrates Bioassessments	Cause Unknown - Impaired Biota	388.1
Combination Benthic/Fishes Bioassessments	Cause Unknown - Impaired Biota	356.9
Low Flow Alterations	Flow Alteration(s)	253.7
Selenium	Metals (other than Mercury)	191.1
Cadmium	Metals (other than Mercury)	191.1
Arsenic	Metals (other than Mercury)	85.7
Lead	Metals (other than Mercury)	78.1
Copper	Metals (other than Mercury)	78.1
Escherichia Coli (E. Coli)	Pathogens	54.3
Nutrient/Eutrophication Biological Indicators	Nutrients	51.4
Temperature, Water	Temperature	40.7
Ammonia, Un-ionized	Ammonia	34.1
Chloride	Salinity/Total Dissolved Solids/Chlorides/Sulfates	30.4
BOD, Carbonaceous	Organic Enrichment/Oxygen Depletion	21.1
Other Flow Regime Alterations	Flow Alteration(s)	20.6
Non-Native Aquatic Plants	Nuisance Exotic Species	5.5
Total Dissolved Solids (TDS)	Salinity/Total Dissolved Solids/Chlorides/Sulfates	5.5

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North 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
Grazing In Riparian Or Shoreline Zones	Agriculture	5,154.4
Animal Feeding Operations (Nps)	Agriculture	3,439.5
Crop Production (Crop Land Or Dry Land)	Agriculture	2,575.0
Loss Of Riparian Habitat	Habitat Alterations (Not Directly Related To Hydromodification)	2,522.3
Source Unknown	Unknown	884.2
Livestock (Grazing Or Feeding Operations)	Agriculture	801.3
Highway/Road/Bridge Runoff (Non-Construction Related)	Urban-Related Runoff/Stormwater	634.9
Channel Erosion/Incision From Upstream Hydromodifications	Hydromodification	584.9
Streambank Modifications/Destabilization	Hydromodification	582.5
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Dishcarges/Sewage	524.8
Drainage/Filling/Loss Of Wetlands	Habitat Alterations (Not Directly Related To Hydromodification)	449.8
Rangeland Grazing	Agriculture	411.9
Upstream Impoundments (E.G., Pl-566 Nrcs Structures)	Hydromodification	368.0
Channelization	Hydromodification	292.4
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	264.8
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso)	Municipal Dishcarges/Sewage	245.1
Wildlife Other Than Waterfowl	Natural/Wildlife	228.8
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	224.6
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	180.7
Site Clearance (Land Development Or Redevelopment)	Construction	125.3
Industrial Point Source Discharge	Industrial	79.6
Sources Outside State Jurisdiction Or Borders	Other	59.6
Wet Weather Discharges (Non-Point Source)	Urban-Related Runoff/Stormwater	57.8
Waterfowl	Natural/Wildlife	36.1
Post-Development Erosion And Sedimentation	Hydromodification	32.3
Flow Alterations From Water Diversions	Hydromodification	27.2
Clean Sediments	Hydromodification	13.1
Dam Construction (Other Than Upstream Flood Control Projects)	Hydromodification	13.1
Golf Courses	Recreation And Tourism (Non-Boating)	13.0

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

Description of this table Assessed Status Acres Assessed 700,218.2 Unassessed 14,691.8 Total Acres 714,910.0

Description of this table Attainment Status Acres Good 190,406.7 Threatened 18,244.7 Impaired 491,566.8 Total Acres Assessed 700,218.2

Description of this table TMDL Development Status Acres All TMDLs completed 3,670.4 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 506,141.1 Total Threatened and Impaired 509,811.5

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North 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
Agricultural	700,218.2	100.0	.0	.0
Fish And Other Aquatic Biota	686,286.9	45.1	54.9	.0
Fish Consumption	485,928.0	.0	.0	100.0
Industrial	700,218.2	100.0	.0	.0
Municipal And Domestic	481,406.2	100.0	.0	.0
Recreation	686,250.1	79.5	19.7	.8

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North 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
Methylmercury	Mercury	485,928.0
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	374,506.7
Temperature, Water	Temperature	368,231.0
Nutrient/Eutrophication Biological Indicators	Nutrients	140,968.4
Sedimentation/Siltation	Sediment	5,499.9
Turbidity	Turbidity	1,567.8
Total Dissolved Solids (TDS)	Salinity/Total Dissolved Solids/Chlorides/Sulfates	36.8

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North 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
Source Unknown	Unknown	485,928.0
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	368,231.0
Crop Production (Crop Land Or Dry Land)	Agriculture	141,282.2
Internal Nutrient Recycling	Natural/Wildlife	139,777.3
Rangeland Grazing	Agriculture	126,299.7
Drainage/Filling/Loss Of Wetlands	Habitat Alterations (Not Directly Related To Hydromodification)	125,895.3
Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso)	Municipal Dishcarges/Sewage	117,760.3
Municipal Point Source Discharges	Municipal Dishcarges/Sewage	117,697.0
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	117,697.0
Livestock (Grazing Or Feeding Operations)	Agriculture	16,341.4
Grazing In Riparian Or Shoreline Zones	Agriculture	14,647.5
Animal Feeding Operations (Nps)	Agriculture	13,484.2
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Dishcarges/Sewage	9,607.2
Littoral/Shore Area Modifications (Non-Riverine)	Habitat Alterations (Not Directly Related To Hydromodification)	7,648.9
Changes In Ordinary Stratification And Bottom Water Hypoxia/Anoxia	Natural/Wildlife	6,275.7
Sediment Resuspension (Clean Sediment)	Hydromodification	2,518.4
Upstream Impoundments (E.G., Pl-566 Nrcs Structures)	Hydromodification	2,073.4
Waterfowl	Natural/Wildlife	2,073.4
Highway/Road/Bridge Runoff (Non-Construction Related)	Urban-Related Runoff/Stormwater	413.6
Streambank Modifications/Destabilization	Hydromodification	392.5
Surface Mining	Resource Extraction	376.8
Loss Of Riparian Habitat	Habitat Alterations (Not Directly Related To Hydromodification)	194.0
Land Application Of Wastewater Biosolids (Non-Agricultural)	Land Application/Waste Sites/Tanks	55.2
Septage Disposal	Municipal Dishcarges/Sewage	55.2
Flow Alterations From Water Diversions	Hydromodification	36.8

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North 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	34.1
Cause Unknown - Impaired Biota	1,237.2
Flow Alteration(s)	274.3
Habitat Alterations	2,525.1
Mercury	401.5	485,928.0
Metals (other than Mercury)	191.1
Nuisance Exotic Species	5.5
Nutrients	51.4	140,968.4
Organic Enrichment/Oxygen Depletion	461.7	374,506.7
Pathogens	5,023.3
Salinity/Total Dissolved Solids/Chlorides/Sulfates	35.9	36.8
Sediment	1,783.1	5,499.9
Temperature	40.7	368,231.0
Turbidity		1,567.8

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North 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	5,684.4	141,467.7
Construction	125.3
Habitat Alterations (Not Directly Related To Hydromodification)	2,563.7	131,470.8
Hydromodification	1,069.9	373,252.1
Industrial	79.6
Land Application/Waste Sites/Tanks		55.2
Municipal Dishcarges/Sewage	727.7	127,422.7
Natural/Wildlife	264.9	139,931.8
Other	59.6
Recreation And Tourism (Non-Boating)	13.0
Resource Extraction		376.8
Unknown	884.2	485,928.0
Urban-Related Runoff/Stormwater	763.2	118,110.6

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North Dakota TMDL Alternatives by Cause of Impairment 2008

No TMDL Alternatives reported.

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North 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
2003	1	1
2004	1	1
2008	2	4

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North 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	123
Sediment	73
Cause Unknown - Impaired Biota	45
Metals (other than Mercury)	40
Nutrients	29
Organic Enrichment/Oxygen Depletion	27
Mercury	21
Salinity/Total Dissolved Solids/Chlorides/Sulfates	3
Temperature	2
Ammonia	2
Turbidity	1

Total: 366 Causes of Impairment

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North 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
Phosphorus	22	37
Fecal Coliform	21	25
Dissolved Oxygen	10	10
Sediment	8	9
Nutrients	5	5
Escherichia Coli (E. Coli)	3	3

Total: 69 TMDLs; 89 Causes of Impairment Addressed

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North 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	11	11
2004	8	12
2005	1	1
2006	6	6
2007	10	10
2008	7	19
2009	26	30

Total: 69 TMDLs; 89 Causes of Impairment Addressed

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