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- Arkansas 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
2006
Waterbody Changes from Prior Cycle
For More Information:
Arkansas Water Quality Assessment Report
Assessed Waters of Arkansas by Watershed
Search for a waterbody within Arkansas
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- Pollution Categories Summary Document
Site-specific Targeted Monitoring Summary Results
Arkansas (2008)
Description of this table| Size of Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
||||||||||||||
| Good Waters | 5,542.6 | 30,010.0 | |||||||||||||
| Previously impaired waters now attaining all uses |
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| Threatened Waters | |||||||||||||||
| TMDL completed | |||||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | |||||||||||||||
| TMDL needed | |||||||||||||||
| Impaired Waters | 4,436.8 | 34,768.0 | |||||||||||||
| TMDL completed | 782.7 | 28,135.0 | |||||||||||||
| TMDL alternative | 10.0 | ||||||||||||||
| Non-pollutant impairment | 22.1 | ||||||||||||||
| TMDL needed | 3,632.0 | 6,623.0 | |||||||||||||
| New TMDLs completed | 77.7 | .0 | |||||||||||||
| Remaining TMDLs needed | 3,554.3 | 6,623.0 | |||||||||||||
 |
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| Total Assessed Waters | 9,979.4 | 64,778.0 | |||||||||||||
| Total Waters | 87,617.0 | 514,245.0 | |||||||||||||
| Percent of Waters Assessed | 11.4 | 12.6 | |||||||||||||
Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2008
Site-specific Targeted Monitoring Results
Arkansas Rivers and Streams 2008
Description of this table
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Arkansas Rivers and Streams 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 |
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 % Impaired |
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| Agricultural Water Supply | 9,934.1 | 86.4 | .0 | 13.6 | |
| Domestic Water Supply | 9,814.9 | 95.3 | .0 | 4.7 | |
| Fish Consumption | 9,934.1 | 96.5 | .0 | 3.5 | |
| Fisheries | 9,941.4 | 64.5 | .0 | 35.5 | |
| Industrial Water Supply | 9,934.1 | 86.4 | .0 | 13.6 | |
| Primary Contact Recreation | 9,972.1 | 92.1 | .0 | 7.9 | |
| Secondary Contact Recreation | 9,963.1 | 99.8 | .0 | .2 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Arkansas Rivers and Streams 2008
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Sedimentation/Siltation | Sediment | 1,787.0 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | 1,309.9 |
| Total Dissolved Solids (TDS) | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 1,010.8 |
| Chloride | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 803.0 |
| Zinc | Metals (other than Mercury) | 724.8 |
| Fecal Coliform | Pathogens | 697.0 |
| Lead | Metals (other than Mercury) | 672.5 |
| Sulfates | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 533.7 |
| Copper | Metals (other than Mercury) | 435.9 |
| Mercury | Mercury | 307.0 |
| Escherichia Coli (E. Coli) | Pathogens | 237.8 |
| pH | pH/Acidity/Caustic Conditions | 200.0 |
| Temperature, Water | Temperature | 86.1 |
| Phosphorus, Total | Nutrients | 72.0 |
| Nitrates | Nutrients | 62.1 |
| Turbidity | Turbidity | 49.4 |
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | 44.8 |
| Aluminum | Metals (other than Mercury) | 11.7 |
| Ammonia, Un-ionized | Ammonia | 11.5 |
| Cadmium | Metals (other than Mercury) | 2.5 |
| Beryllium | Metals (other than Mercury) | 2.5 |
Site-specific Targeted Monitoring Results
Probable Sources
Arkansas Rivers and Streams 2008
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| Source Unknown | Unknown | 1,794.3 |
| Agriculture | Agriculture | 1,073.6 |
| Highways, Roads, Bridges, Infrastructure (New Construction) | Construction | 288.6 |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | 195.5 |
| Industrial Point Source Discharge | Industrial | 182.0 |
| Mine Tailings | Resource Extraction | 166.5 |
| Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | 14.1 |
| Hydrostructure Impacts On Fish Passage | Hydromodification | 7.2 |
| Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | 2.0 |
Site-specific Targeted Monitoring Results
Arkansas Lakes, Reservoirs, and Ponds 2008
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Arkansas Lakes, Reservoirs, and Ponds 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 Water Supply | 64,778.0 | 100.0 | .0 | .0 | |
| Domestic Water Supply | 64,778.0 | 100.0 | .0 | .0 | |
| Fish Consumption | 64,778.0 | 63.8 | .0 | 36.2 | |
| Fisheries | 64,778.0 | 82.5 | .0 | 17.5 | |
| Industrial Water Supply | 64,778.0 | 100.0 | .0 | .0 | |
| Primary Contact Recreation | 64,778.0 | 100.0 | .0 | .0 | |
| Secondary Contact Recreation | 64,778.0 | 100.0 | .0 | .0 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Arkansas Lakes, Reservoirs, and Ponds 2008
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| Mercury | Mercury | 23,510.0 |
| Phosphorus, Total | Nutrients | 6,513.0 |
| Sedimentation/Siltation | Sediment | 4,735.0 |
| Copper | Metals (other than Mercury) | 335.0 |
| Dioxin (Including 2,3,7,8-TCDD) | Dioxins | 10.0 |
Site-specific Targeted Monitoring Results
Probable Sources
Arkansas Lakes, Reservoirs, and Ponds 2008
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| Source Unknown | Unknown | 5,181.0 |
| Industrial Point Source Discharge | Industrial | 10.0 |
Arkansas 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. 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 | 11.5 | ||||||||||||||
| Dioxins | 44.8 | 10.0 | |||||||||||||
| Mercury | 307.0 | 23,510.0 | |||||||||||||
| Metals (other than Mercury) | 1,447.8 | 335.0 | |||||||||||||
| Nutrients | 121.3 | 6,513.0 | |||||||||||||
| Organic Enrichment/Oxygen Depletion | 1,309.9 | ||||||||||||||
| Pathogens | 796.8 | ||||||||||||||
| pH/Acidity/Caustic Conditions | 200.0 | ||||||||||||||
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 1,369.7 | ||||||||||||||
| Sediment | 1,787.0 | 4,735.0 | |||||||||||||
| Temperature | 86.1 | ||||||||||||||
| Turbidity | 49.4 | ||||||||||||||
Arkansas 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 | 1,073.6 | ||||||||||||||
| Construction | 288.6 | ||||||||||||||
| Hydromodification | 9.2 | ||||||||||||||
| Industrial | 182.0 | 10.0 | |||||||||||||
| Municipal Discharges/Sewage | 195.5 | ||||||||||||||
| Resource Extraction | 166.5 | ||||||||||||||
| Unknown | 1,794.3 | 5,181.0 | |||||||||||||
| Urban-Related Runoff/Stormwater | 14.1 | ||||||||||||||
Arkansas TMDL Alternatives by Cause of Impairment 2008
Description of this table
| NOTE: Click on the underlined "Number of TMDL Alternatives by Cause of Impairment " value to see a listing of those Causes of Impairment. | ||||||||||||||
| Cause of Impairment | Number of TMDL Alternatives |
Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dioxin (Including 2,3,7,8-TCDD) |  2 |
45 | 10 | |||||||||||
Total: 2 TMDL Alternatives
Arkansas Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards
No previously 303(d)-listed waters reported as now attaining all applicable water quality standards.
Arkansas 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 |
|---|---|
| Metals (other than Mercury) | 115 |
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 111 |
| Organic Enrichment/Oxygen Depletion | 62 |
| Sediment | 42 |
| Pathogens | 38 |
| pH/Acidity/Caustic Conditions | 18 |
| Nutrients | 12 |
| Temperature | 9 |
| Turbidity | 2 |
Total: 409 Causes of Impairment
Arkansas 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 |
|---|---|---|
| Total Suspended Solids (TSS) |  40 |
40 |
| Mercury in Fish Tissue | 36 |
36 |
| Fecal Coliform | 34 |
34 |
| Escherichia Coli (E. Coli) | 32 |
32 |
| Siltation/Turbidity | 18 |
18 |
| Lead | 12 |
12 |
| Sulfate | 12 |
12 |
| Total Dissolved Solids (TDS) | 12 |
12 |
| Turbidity | 10 |
10 |
| Chloride | 9 |
9 |
| pH | 9 |
9 |
| Copper | 8 |
8 |
| Phosphorus, Total | 7 |
7 |
| Nitrate | 6 |
6 |
| Zinc | 5 |
5 |
| Ammonia Nitrogen | 4 |
4 |
| Chlorides | 3 |
3 |
| Phosphorus | 3 |
3 |
| Sulfates | 3 |
3 |
| Ammonia | 2 |
2 |
| Oxygen Demand | 2 |
2 |
| Carbonaceous Bod | 1 |
1 |
| Dissolved Oxygen | 1 |
1 |
| Mercury | 1 |
1 |
| Nitrates | 1 |
1 |
Total: 271 TMDLs; 271 Causes of Impairment Addressed
Arkansas 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 |
|---|---|---|
| 2001 | 6 |
6 |
| 2002 | 7 |
7 |
| 2003 | 44 |
44 |
| 2004 | 11 |
11 |
| 2005 | 13 |
13 |
| 2006 | 45 |
45 |
| 2007 | 62 |
62 |
| 2008 | 34 |
34 |
| 2009 | 10 |
10 |
| 2010 | 2 |
2 |
| 2011 | 7 |
7 |
| 2012 | 30 |
30 |
Total: 271 TMDLs; 271 Causes of Impairment Addressed