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- North Dakota Assessment Summary
- Water Quality by Waterbody Type
- Causes of Impairment
- Probable Sources Contributing to Impairments
- TMDL Alternatives by Cause of Impairment
- Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards
- Causes of Impairment for 303(d) Listed Waters
- Cumulative TMDLs by Pollutant
- Cumulative Number of TMDLs
Data are also available for these cycles:
2002
2004
2008
2010
2012
Waterbody Changes from Prior Cycle
For More Information:
North Dakota Assessment Report
State Water Quality Program
North Dakota Water Quality Assessment Report
Assessed Waters of North Dakota by Watershed
Search for a waterbody within North Dakota
NOTE: The data provided in this report differs slightly from the information provided in the original North Dakota 2006 305(b) report. This is a result of differences between the North Dakota State assessment database and the summary data provided in North Dakota's 2006 Integrated Report, which is available at http://www.health.state.nd.us/WQ/SW/Z7_Publications/303(d)Lists/2006%20Integrated%20Report%20for%20North%20Dakota-Final%20Approved%2020060720(f).pdf
NOTE: The data provided in this report differs slightly from the information provided in the original North Dakota 2006 305(b) report. This is a result of differences between the North Dakota State assessment database and the summary data provided in North Dakota's 2006 Integrated Report, which is available at http://www.health.state.nd.us/WQ/SW/Z7_Publications/303(d)Lists/2006%20Integrated%20Report%20for%20North%20Dakota-Final%20Approved%2020060720(f).pdf
Features
- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
- EnviroMapper for Water
- AskWATERS
- EPA WATERS Homepage
- Exchange Network
- Assessment Database
- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Site-specific Targeted Monitoring Summary Results
North Dakota (2006)
Description of this table| Size of Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Good Waters | 2,600.7 | 157,623.9 | |||||||||||||
| Previously impaired waters now attaining all uses |
114.3 | 1,014.1 | |||||||||||||
| Threatened Waters | 3,339.7 | 19,544.3 | |||||||||||||
| TMDL completed | 77.3 | 1,871.5 | |||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | 260.2 | ||||||||||||||
| TMDL needed | 3,002.2 | 17,672.8 | |||||||||||||
| Impaired Waters | 2,697.3 | 498,832.8 | |||||||||||||
| TMDL completed | |||||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | 39.8 | ||||||||||||||
| TMDL needed | 2,657.5 | 498,832.8 | |||||||||||||
| New TMDLs completed | 81.0 | 2,222.2 | |||||||||||||
| Remaining TMDLs needed | 2,576.5 | 496,610.6 | |||||||||||||
 |
|||||||||||||||
| Total Assessed Waters | 8,637.7 | 676,001.0 | |||||||||||||
| Total Waters | 54,427.0 | 714,910.0 | |||||||||||||
| Percent of Waters Assessed | 15.9 | 94.6 | |||||||||||||
Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2006
Site-specific Targeted Monitoring Results
North Dakota Rivers and Streams 2006
Description of this table
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
North Dakota Rivers and Streams 2006
* 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 |
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| Fish And Other Aquatic Biota | 4,517.1 | 30.9 | 51.6 | 17.5 | |
| Fish Consumption | 399.2 | .0 | .0 | 100.0 | |
| Municipal And Domestic | 1,512.2 | 91.4 | 8.6 | .0 | |
| Recreation | 6,296.9 | 35.9 | 37.4 | 26.7 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
North Dakota Rivers and Streams 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Fecal Coliform | Pathogens | 3,993.0 |
| Physical Substrate Habitat Alterations | Habitat Alterations | 2,562.6 |
| Sedimentation/Siltation | Sediment | 1,980.8 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | 462.6 |
| Fishes Bioassessments (Streams) | Cause Unknown - Impaired Biota | 457.8 |
| Methylmercury | Mercury | 399.2 |
| Combination Benthic/Fishes Bioassessments | Cause Unknown - Impaired Biota | 358.7 |
| Benthic Macroinvertebrates Bioassessments | Cause Unknown - Impaired Biota | 336.1 |
| Low Flow Alterations | Flow Alteration(s) | 294.6 |
| Odor Threshold Number | Taste, Color and Odor | 130.0 |
| Nutrient/Eutrophication Biological Indicators | Nutrients | 109.8 |
| Selenium | Metals (other than Mercury) | 67.6 |
| Total Dissolved Solids (TDS) | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 52.7 |
| Temperature, Water | Temperature | 40.1 |
| Lead | Metals (other than Mercury) | 36.6 |
| Copper | Metals (other than Mercury) | 36.6 |
| Ammonia, Un-ionized | Ammonia | 34.5 |
| Other Flow Regime Alterations | Flow Alteration(s) | 20.6 |
| BOD, Carbonaceous | Organic Enrichment/Oxygen Depletion | 20.1 |
| Non-Native Aquatic Plants | Nuisance Exotic Species | 5.5 |
Site-specific Targeted Monitoring Results
Probable Sources
North Dakota Rivers and Streams 2006
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| Grazing In Riparian Or Shoreline Zones | Agriculture | 4,936.2 |
| Animal Feeding Operations (Nps) | Agriculture | 3,269.0 |
| Crop Production (Crop Land Or Dry Land) | Agriculture | 2,664.3 |
| Loss Of Riparian Habitat | Habitat Alterations (Not Directly Related To Hydromodification) | 2,565.3 |
| Livestock (Grazing Or Feeding Operations) | Agriculture | 800.8 |
| Source Unknown | Unknown | 771.5 |
| Streambank Modifications/Destablization | Hydromodification | 658.6 |
| Highway/Road/Bridge Runoff (Non-Construction Related) | Urban-Related Runoff/Stormwater | 657.1 |
| Channel Erosion/Incision From Upstream Hydromodifications | Hydromodification | 598.3 |
| Drainage/Filling/Loss Of Wetlands | Habitat Alterations (Not Directly Related To Hydromodification) | 580.5 |
| Upstream Impoundments (E.G., Pl-566 Nrcs Structures) | Hydromodification | 555.3 |
| On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Discharges/Sewage | 494.9 |
| Rangeland Grazing | Agriculture | 454.0 |
| Channelization | Hydromodification | 290.1 |
| Wildlife Other Than Waterfowl | Natural/Wildlife | 262.1 |
| Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | 260.2 |
| Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) | Municipal Discharges/Sewage | 238.9 |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | 223.2 |
| Municipal (Urbanized High Density Area) | Urban-Related Runoff/Stormwater | 175.7 |
| Site Clearance (Land Development Or Redevelopment) | Construction | 123.2 |
| Flow Alterations From Water Diversions | Hydromodification | 103.4 |
| Industrial Point Source Discharge | Industrial | 78.5 |
| Sources Outside State Juristiction Or Borders | Other | 59.6 |
| Wet Weather Discharges (Non-Point Source) | Urban-Related Runoff/Stormwater | 56.3 |
| Dam Construction (Other Than Upstream Flood Control Projects) | Hydromodification | 34.4 |
| Natural Sources | Natural/Wildlife | 31.0 |
| Post-Development Erosion And Sedimentation | Hydromodification | 30.8 |
| Waterfowl | Natural/Wildlife | 21.2 |
| Golf Courses | Recreation And Tourism (Non-Boating) | 14.4 |
| Clean Sediments | Hydromodification | 12.8 |
Site-specific Targeted Monitoring Results
North Dakota Lakes, Reservoirs, and Ponds 2006
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
North Dakota Lakes, Reservoirs, and Ponds 2006
* 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 |
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| Fish And Other Aquatic Biota | 676,001.0 | 43.9 | 56.0 | .0 | |
| Fish Consumption | 493,231.0 | .0 | .0 | 100.0 | |
| Municipal And Domestic | 368,762.0 | 100.0 | .0 | .0 | |
| Recreation | 675,964.2 | 77.9 | 21.3 | .8 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
North Dakota Lakes, Reservoirs, and Ponds 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| Methylmercury | Mercury | 493,231.0 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | 377,169.5 |
| Temperature, Water | Temperature | 368,231.0 |
| Nutrient/Eutrophication Biological Indicators | Nutrients | 149,848.8 |
| Sedimentation/Siltation | Sediment | 6,632.3 |
| Turbidity | Turbidity | 1,488.3 |
| Total Dissolved Solids (TDS) | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 36.8 |
Site-specific Targeted Monitoring Results
Probable Sources
North Dakota Lakes, Reservoirs, and Ponds 2006
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| Source Unknown | Unknown | 493,267.8 |
| Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | 368,231.0 |
| Crop Production (Crop Land Or Dry Land) | Agriculture | 149,923.8 |
| Internal Nutrient Recycling | Natural/Wildlife | 148,726.8 |
| Rangeland Grazing | Agriculture | 134,005.5 |
| Drainage/Filling/Loss Of Wetlands | Habitat Alterations (Not Directly Related To Hydromodification) | 133,217.9 |
| Wet Weather Discharges (Point Source And Combination Of Stormwater, Sso Or Cso) | Municipal Discharges/Sewage | 125,085.3 |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | 125,000.0 |
| Municipal (Urbanized High Density Area) | Urban-Related Runoff/Stormwater | 125,000.0 |
| Livestock (Grazing Or Feeding Operations) | Agriculture | 17,415.7 |
| Grazing In Riparian Or Shoreline Zones | Agriculture | 14,708.0 |
| Animal Feeding Operations (Nps) | Agriculture | 13,716.7 |
| On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Discharges/Sewage | 11,491.9 |
| Changes In Ordinary Stratification And Bottom Water Hypoxia/Anoxia | Natural/Wildlife | 8,938.5 |
| Littoral/Shore Area Modifications (Non-Riverine) | Habitat Alterations (Not Directly Related To Hydromodification) | 8,395.0 |
| Sediment Resuspension (Clean Sediment) | Hydromodification | 2,438.9 |
| Upstream Impoundments (E.G., Pl-566 Nrcs Structures) | Hydromodification | 2,086.0 |
| Waterfowl | Natural/Wildlife | 2,086.0 |
| Site Clearance (Land Development Or Redevelopment) | Construction | 414.0 |
| Loss Of Riparian Habitat | Habitat Alterations (Not Directly Related To Hydromodification) | 414.0 |
| Silviculture Plantation Management | Silviculture (Forestry) | 414.0 |
| Flow Alterations From Water Diversions | Hydromodification | 323.5 |
| Highway/Road/Bridge Runoff (Non-Construction Related) | Urban-Related Runoff/Stormwater | 297.3 |
| Surface Mining | Resource Extraction | 260.5 |
| Streambank Modifications/Destablization | Hydromodification | 198.5 |
| Land Application Of Wastewater Biosolids (Non-Agricultural) | Land Application/Waste Sites/Tanks | 55.2 |
| Septage Disposal | Municipal Discharges/Sewage | 55.2 |
North Dakota Causes of Impairment for Reporting Year 2006
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. | |||||||||||||||
| Cause of Impairment Group | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Ammonia | 34.5 | ||||||||||||||
| Cause Unknown - Impaired Biota | 1,152.7 | ||||||||||||||
| Flow Alteration(s) | 315.1 | ||||||||||||||
| Habitat Alterations | 2,562.6 | ||||||||||||||
| Mercury | 399.2 | 493,231.0 | |||||||||||||
| Metals (other than Mercury) | 67.6 | ||||||||||||||
| Nuisance Exotic Species | 5.5 | ||||||||||||||
| Nutrients | 109.8 | 149,848.8 | |||||||||||||
| Organic Enrichment/Oxygen Depletion | 462.6 | 377,169.5 | |||||||||||||
| Pathogens | 3,993.0 | ||||||||||||||
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 52.7 | 36.8 | |||||||||||||
| Sediment | 1,980.8 | 6,632.3 | |||||||||||||
| Taste, Color and Odor | 130.0 | ||||||||||||||
| Temperature | 40.1 | 368,231.0 | |||||||||||||
| Turbidity | 1,488.3 | ||||||||||||||
North Dakota Probable Sources Contributing to Impairments
for Reporting Year 2006
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 | 5,482.8 | 150,109.3 | |||||||||||||
| Construction | 123.2 | 414.0 | |||||||||||||
| Habitat Alterations (Not Directly Related To Hydromodification) | 2,736.3 | 139,526.9 | |||||||||||||
| Hydromodification | 1,270.7 | 373,277.9 | |||||||||||||
| Industrial | 78.5 | ||||||||||||||
| Land Application/Waste Sites/Tanks | 55.2 | ||||||||||||||
| Municipal Discharges/Sewage | 693.6 | 136,632.4 | |||||||||||||
| Natural/Wildlife | 314.3 | 148,888.2 | |||||||||||||
| Other | 59.6 | ||||||||||||||
| Recreation And Tourism (Non-Boating) | 14.4 | ||||||||||||||
| Resource Extraction | 260.5 | ||||||||||||||
| Silviculture (Forestry) | 414.0 | ||||||||||||||
| Unknown | 771.5 | 493,267.8 | |||||||||||||
| Urban-Related Runoff/Stormwater | 782.4 | 125,297.3 | |||||||||||||
North Dakota TMDL Alternatives by Cause of Impairment 2006
No TMDL Alternatives reported.
North Dakota 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. | ||
| Year Attaining | Number of Waters Attaining | Number of Causes of Impairment Addressed |
|---|---|---|
| 2003 | 1 |
2 |
| 2004 | 1 |
1 |
| 2008 | 2 |
4 |
| 2013 | 3 |
4 |
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 | 102 |
| Sediment | 82 |
| Nutrients | 47 |
| Organic Enrichment/Oxygen Depletion | 45 |
| Cause Unknown - Impaired Biota | 43 |
| Mercury | 21 |
| Metals (other than Mercury) | 11 |
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 5 |
| Ammonia | 2 |
| Turbidity | 2 |
| Temperature | 2 |
Total: 362 Causes of Impairment
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 |
|---|---|---|
| Fecal Coliform |  48 |
52 |
| Phosphorus | 27 |
45 |
| Escherichia Coli (E. Coli) | 23 |
23 |
| Dissolved Oxygen | 12 |
12 |
| Sediment | 8 |
9 |
| Nutrients | 5 |
5 |
Total: 123 TMDLs; 146 Causes of Impairment Addressed
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 |
| 2010 | 22 |
22 |
| 2011 | 16 |
16 |
| 2012 | 8 |
8 |
| 2013 | 8 |
11 |
Total: 123 TMDLs; 146 Causes of Impairment Addressed