Utah Water Quality Assessment Report
On This Page
- Utah 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
2008
2010
Waterbody Changes from Prior Cycle
For More Information:
State Water Quality Program
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Download Excel compatible information
Download GIS Information:
Site-specific Targeted Monitoring Summary Results
Utah (2014)
Description of this table| Size of Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
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| Good Waters | |||||||||||||||
| Previously impaired waters now attaining all uses |
585.3 | 86.0 | |||||||||||||
| Threatened Waters | |||||||||||||||
| TMDL completed | |||||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | |||||||||||||||
| TMDL needed | |||||||||||||||
| Impaired Waters | 7,007.0 | 152,691.0 | |||||||||||||
| TMDL completed | 620.4 | 29,982.0 | |||||||||||||
| TMDL alternative | |||||||||||||||
| Non-pollutant impairment | |||||||||||||||
| TMDL needed | 6,386.6 | 122,709.0 | |||||||||||||
| New TMDLs completed | .0 | .0 | |||||||||||||
| Remaining TMDLs needed | 6,386.6 | 122,709.0 | |||||||||||||
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| Total Assessed Waters | 7,007.0 | 152,691.0 | |||||||||||||
| Total Waters | 85,916.0 | 481,638.0 | |||||||||||||
| Percent of Waters Assessed | 8.2 | 31.7 | |||||||||||||
Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2014
Statewide Statistical Survey Summary Results
Utah Rivers and Streams 2014
| Designated Use | Stressors | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Where two or more state condition categories fall under one national category, EPA used the largest margin of error for purposes of displaying this information in the report.
Site-specific Targeted Monitoring Results
Utah Rivers and Streams 2014
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Utah Rivers and Streams 2014
* 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 | |
|---|---|---|---|---|---|
| Agricultural | 2,543.7 | .0 | .0 | 100.0 | ![]() |
| Cold Water Aquatic Life | 4,709.5 | .0 | .0 | 100.0 | ![]() |
| Domestic Water Supply | 887.0 | .0 | .0 | 100.0 | ![]() |
| Non-Game Fish And Other Aquatic Life | 696.7 | .0 | .0 | 100.0 | ![]() |
| Primary Recreation | 216.0 | .0 | .0 | 100.0 | ![]() |
| Secondary Recreation | 1,198.4 | .0 | .0 | 100.0 | ![]() |
| Warm Water Aquatic Life | 1,079.2 | .0 | .0 | 100.0 | ![]() |
| Wildlife Habitat | 336.8 | .0 | .0 | 100.0 | ![]() |
Site-specific Targeted Monitoring Results
Causes of Impairment
Utah Rivers and Streams 2014
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| Temperature, Water | Temperature | 2,091.2 |
| Total Dissolved Solids (TDS) | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 1,666.0 |
| Benthic Macroinvertebrates Bioassessments | Cause Unknown - Impaired Biota | 1,646.5 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | 1,532.1 |
| Aluminum | Metals (other than Mercury) | 1,279.0 |
| pH | pH/Acidity/Caustic Conditions | 925.5 |
| Selenium | Metals (other than Mercury) | 710.7 |
| Phosphorus, Total | Nutrients | 607.8 |
| Escherichia Coli (E. Coli) | Pathogens | 519.7 |
| Sedimentation/Siltation | Sediment | 498.5 |
| Zinc | Metals (other than Mercury) | 425.8 |
| Boron | Toxic Inorganics | 375.6 |
| Arsenic | Metals (other than Mercury) | 242.7 |
| Copper | Metals (other than Mercury) | 171.6 |
| Cadmium | Metals (other than Mercury) | 148.3 |
| Ammonia, Total | Ammonia | 138.5 |
| Cause Unknown | Cause Unknown | 57.7 |
| Direct Habitat Alterations | Habitat Alterations | 41.2 |
| Nitrate/Nitrite (Nitrite + Nitrate as N) | Nutrients | 39.4 |
| Iron | Metals (other than Mercury) | 27.8 |
| Lead | Metals (other than Mercury) | 27.2 |
| Radium | Radiation | 22.9 |
| Alpha Particles | Radiation | 17.2 |
Site-specific Targeted Monitoring Results
Probable Sources
Utah Rivers and Streams 2014
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| Source Unknown | Unknown | 6,997.2 |
Statewide Statistical Survey Summary Results
Utah Lakes, Reservoirs, and Ponds 2014
| Designated Use | Stressors | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Where two or more state condition categories fall under one national category, EPA used the largest margin of error for purposes of displaying this information in the report.
Site-specific Targeted Monitoring Results
Utah Lakes, Reservoirs, and Ponds 2014
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Utah 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| Designated Use | Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | |
|---|---|---|---|---|---|
| Cold Water Aquatic Life | 46,661.0 | .0 | .0 | 100.0 | ![]() |
| Warm Water Aquatic Life | 106,030.0 | .0 | .0 | 100.0 | ![]() |
Site-specific Targeted Monitoring Results
Causes of Impairment
Utah Lakes, Reservoirs, and Ponds 2014
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| Phosphorus, Total | Nutrients | 142,140.0 |
| PCB(s) in Fish Tissue | Polychlorinated Biphenyls (PCBs) | 96,900.0 |
| Total Dissolved Solids (TDS) | Salinity/Total Dissolved Solids/Chlorides/Sulfates | 96,900.0 |
| Dissolved Oxygen | Organic Enrichment/Oxygen Depletion | 47,040.0 |
| Temperature, Water | Temperature | 22,731.0 |
| pH | pH/Acidity/Caustic Conditions | 9,204.0 |
| Mercury in Fish Tissue | Mercury | |
| pH, High | pH/Acidity/Caustic Conditions |
Site-specific Targeted Monitoring Results
Probable Sources
Utah Lakes, Reservoirs, and Ponds 2014
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| Source Unknown | Unknown | 152,691.0 |
Statewide Statistical Survey Summary Results
Utah Wetlands 2014
| Designated Use | ||
|---|---|---|
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Where two or more state condition categories fall under one national category, EPA used the largest margin of error for purposes of displaying this information in the report.
Site-specific Targeted Monitoring Results
Utah Wetlands 2014
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Utah Wetlands 2014
No designated uses reported.
Site-specific Targeted Monitoring Results
Causes of Impairment
Utah Wetlands 2014
No causes of impairment reported.
Site-specific Targeted Monitoring Results
Probable Sources
Utah Wetlands 2014
No probable sources of impairments reported.
Utah 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. | |||||||||||||||
| Cause of Impairment Group | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
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| Ammonia | 138.5 | ||||||||||||||
| Cause Unknown | 57.7 | ||||||||||||||
| Cause Unknown - Impaired Biota | 1,646.5 | ||||||||||||||
| Habitat Alterations | 41.2 | ||||||||||||||
| Mercury | 163.0 | ||||||||||||||
| Metals (other than Mercury) | 2,372.7 | ||||||||||||||
| Nutrients | 647.1 | 142,140.0 | |||||||||||||
| Organic Enrichment/Oxygen Depletion | 1,532.1 | 47,040.0 | |||||||||||||
| Pathogens | 519.7 | ||||||||||||||
| pH/Acidity/Caustic Conditions | 925.5 | 9,360.0 | |||||||||||||
| Polychlorinated Biphenyls (PCBs) | 96,900.0 | ||||||||||||||
| Radiation | 22.9 | ||||||||||||||
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 1,666.0 | 96,900.0 | |||||||||||||
| Sediment | 498.5 | ||||||||||||||
| Temperature | 2,091.2 | 22,731.0 | |||||||||||||
| Toxic Inorganics | 375.6 | ||||||||||||||
Utah 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. | |||||||||||||||
| Probable Source Group | Size of Assessed Waters with Probable Sources of Impairments | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
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| Unknown | 6,997.2 | 152,691.0 | |||||||||||||
Utah TMDL Alternatives by Cause of Impairment 2014
No TMDL Alternatives reported.
Utah 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 |
| 2012 | 21 |
44 |
| 2016 | 13 |
14 |
Utah 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 |
|---|---|
| Temperature | 104 |
| Metals (other than Mercury) | 87 |
| Organic Enrichment/Oxygen Depletion | 64 |
| Salinity/Total Dissolved Solids/Chlorides/Sulfates | 61 |
| Cause Unknown - Impaired Biota | 54 |
| pH/Acidity/Caustic Conditions | 34 |
| Pathogens | 28 |
| Nutrients | 14 |
| Toxic Inorganics | 13 |
| Ammonia | 3 |
| Cause Unknown | 2 |
| Mercury | 1 |
| Polychlorinated Biphenyls (PCBs) | 1 |
Total: 466 Causes of Impairment
Utah 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 | 46 |
65 |
| Dissolved Oxygen | 43 |
46 |
| Ammonia | 37 |
37 |
| Total Dissolved Solids (TDS) | 36 |
36 |
| Phosphorus, Total | 23 |
24 |
| Ammonia, Un-ionized | 17 |
17 |
| Total Residual Chlorine | 16 |
16 |
| Chlorine | 13 |
14 |
| Sediment | 10 |
10 |
| Biochemical Oxygen Demand (BOD) | 9 |
9 |
| Chlorine, Residual (Chlorine Demand) | 9 |
9 |
| Selenium | 8 |
8 |
| Copper | 6 |
8 |
| Iron | 6 |
6 |
| Habitat | 5 |
5 |
| Temperature | 5 |
5 |
| Zinc | 5 |
7 |
| Lead | 4 |
6 |
| Escherichia Coli (E. Coli) | 3 |
3 |
| Silver | 3 |
3 |
| Total Organic Carbon (TOC) | 3 |
3 |
| Gross Alpha | 2 |
2 |
| Mercury | 2 |
4 |
| Nitrogen, Total | 2 |
2 |
| Total Suspended Solids (TSS) | 2 |
2 |
| Aluminum | 1 |
1 |
| Boron | 1 |
1 |
| Cadmium | 1 |
1 |
| Chromium, Hexavalent | 1 |
1 |
| Cyanide | 1 |
1 |
| Fecal Coliform | 1 |
1 |
| Salinity/Total Dissolved Solids/Chlorides | 1 |
1 |
| Thermal Modifications | 1 |
1 |
| Total Coliform | 1 |
1 |
Total: 324 TMDLs; 356 Causes of Impairment Addressed
Utah 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 | 15 |
24 |
| 1998 | 22 |
23 |
| 1999 | 16 |
16 |
| 2000 | 31 |
40 |
| 2001 | 12 |
13 |
| 2002 | 35 |
35 |
| 2003 | 8 |
8 |
| 2004 | 45 |
45 |
| 2005 | 68 |
68 |
| 2006 | 12 |
12 |
| 2007 | 38 |
41 |
| 2008 | 4 |
5 |
| 2010 | 6 |
13 |
| 2012 | 1 |
1 |
| 2013 | 3 |
3 |
| 2014 | 8 |
9 |
Total: 324 TMDLs; 356 Causes of Impairment Addressed

