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On This Page 303(d) Listed Waters for 2010

Data are also available for these cycles:
2002 2004 2006 2008

Waterbody Changes from Prior Cycle

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Site-specific Targeted Monitoring Summary Results

Guam (2010)

Description of this table
 
    55.7 20.4
      
   
                          
                          
                          
                          
    29.0 14.8 16.1 6.4
           21.6          5.8     
                          
                          
           7.4     14.8     10.3     6.4
              .0     .0     .0     .0
                    7.4           14.8           10.3           6.4
84.7 35.1 16.1 6.4
228.7 915.0 116.5 1,795.4
37.0 3.8 13.8 .4

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2010


Site-specific Targeted Monitoring Results

Guam Rivers and Streams 2010

Description of this table

All
Rivers and Streams

228.7 Miles of Rivers and Streams

Assessed 84.7
Unassessed 144.0
Total Miles 228.7







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Description of this table

Assessed
Rivers and Streams

84.7 Miles of
Assessed Rivers and Streams

Good 55.7
Threatened .0
Impaired 29.0
Total Miles Assessed 84.7







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Description of this table

Threatened and Impaired
Rivers and Streams

29.0 Miles of
Threatened and Impaired
Rivers and Streams

21.6
.0
.0
7.4
Total Threatened and Impaired 29.0

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Guam Rivers and Streams 2010

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

Description of this table
% Good
% Threatened
% Impaired
Aesthetic Enjoyment 1.1 .0 .0 100.0 color.gif
Aquatic Life 64.8 56.4 .0 43.6 color.gifcolor.gif
Consumption 48.2 95.2 .0 4.8 color.gifcolor.gif
Drinking Water .1 .0 .0 100.0 color.gif
Drinking Water (With Treatment) 1.1 .0 .0 100.0 color.gif
Limited Body Contact Recreation 28.6 83.4 .0 16.6 color.gifcolor.gif
Whole Body Contact Recreation 27.2 92.8 .0 7.2 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Guam Rivers and Streams 2010

Description of this table
Turbidity Turbidity color.gif 21.8
Escherichia Coli (E. Coli) Pathogens color.gif 6.2
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif 5.5
Enterococcus Bacteria Pathogens color.gif 1.6
Nitrates Nutrients color.gif 1.4
Salinity Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 1.3
Total Suspended Solids (TSS) Turbidity color.gif 1.3
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 1.2
Zinc Metals (other than Mercury) color.gif 1.1
Temperature, Water Temperature color.gif 1.1
Copper Metals (other than Mercury) color.gif 1.1
Aluminum Metals (other than Mercury) color.gif 1.1
Manganese Metals (other than Mercury) color.gif 1.1
Total Dissolved Solids (TDS) Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 1.1
Chromium, Total Metals (other than Mercury) color.gif 1.1
Total Coliform Pathogens color.gif 1.1
Nickel Metals (other than Mercury) color.gif 1.1
Ammonia, Un-ionized Ammonia color.gif 1.1
Iron Metals (other than Mercury) color.gif 1.1

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Site-specific Targeted Monitoring Results

Probable Sources
Guam Rivers and Streams 2010

No probable sources of impairments reported.

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Site-specific Targeted Monitoring Results

Guam Bays and Estuaries 2010

Description of this table

All
Bays and Estuaries

915.0 Square Miles of Bays and Estuaries

Assessed 35.1
Unassessed 879.9
Total Square Miles 915.0







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Description of this table

Assessed
Bays and Estuaries

35.1 Square Miles of
Assessed Bays and Estuaries

Good 20.4
Threatened .0
Impaired 14.8
Total Square Miles Assessed 35.1







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Description of this table

Threatened and Impaired
Bays and Estuaries

14.8 Square Miles of
Threatened and Impaired
Bays and Estuaries

.0
.0
.0
14.8
Total Threatened and Impaired 14.8

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Guam Bays and Estuaries 2010

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

Description of this table
% Good
% Threatened
% Impaired
Aquatic Life 32.7 91.8 .0 8.2 color.gifcolor.gif
Consumption 23.2 39.3 .0 60.7 color.gifcolor.gif
Whole Body Contact Recreation 31.1 97.8 .0 2.2 color.gifcolor.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Guam Bays and Estuaries 2010

Description of this table
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 11.7
Dieldrin Pesticides color.gif 2.0
Trichloroethylene (TCE) Toxic Organics color.gif 2.0
Antimony Toxic Inorganics color.gif 2.0
Tetrachloroethylene Toxic Organics color.gif 2.0
Arsenic Metals (other than Mercury) color.gif 2.0
Chlordane Pesticides color.gif 2.0
Nitrates Nutrients color.gif .7
Dissolved Oxygen Organic Enrichment/Oxygen Depletion color.gif .7
Enterococcus Bacteria Pathogens color.gif .7
Chlordane in Fish Tissue Pesticides color.gif .6
Dioxin (Including 2,3,7,8-TCDD) Dioxins color.gif .6
Toxic Seafood Advisory (Seaweed) Other Cause color.gif .4

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Site-specific Targeted Monitoring Results

Probable Sources
Guam Bays and Estuaries 2010

No probable sources of impairments reported.

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Site-specific Targeted Monitoring Results

Guam Coastal Shoreline 2010

Description of this table

All
Coastal Shoreline

116.5 Miles of Coastal Shoreline

Assessed 16.1
Unassessed 100.4
Total Miles 116.5







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Description of this table

Assessed
Coastal Shoreline

16.1 Miles of
Assessed Coastal Shoreline

Good .0
Threatened .0
Impaired 16.1
Total Miles Assessed 16.1







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Description of this table

Threatened and Impaired
Coastal Shoreline

16.1 Miles of
Threatened and Impaired
Coastal Shoreline

5.8
.0
.0
10.3
Total Threatened and Impaired 16.1

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Guam Coastal Shoreline 2010

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

Description of this table
% Good
% Threatened
% Impaired
Consumption .7 .0 .0 100.0 color.gif
Whole Body Contact Recreation 15.5 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Guam Coastal Shoreline 2010

Description of this table
Enterococcus Bacteria Pathogens color.gif 15.5
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif .7

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Site-specific Targeted Monitoring Results

Probable Sources
Guam Coastal Shoreline 2010

No probable sources of impairments reported.

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Site-specific Targeted Monitoring Results

Guam Wetlands 2010

Description of this table

All
Wetlands

1,795.4 Acres of Wetlands

Assessed 6.4
Unassessed 1,789.0
Total Acres 1,795.4







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Description of this table

Assessed
Wetlands

6.4 Acres of
Assessed Wetlands

Good .0
Threatened .0
Impaired 6.4
Total Acres Assessed 6.4







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Description of this table

Threatened and Impaired
Wetlands

6.4 Acres of
Threatened and Impaired
Wetlands

.0
.0
.0
6.4
Total Threatened and Impaired 6.4

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Guam Wetlands 2010

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

Description of this table
% Good
% Threatened
% Impaired
Consumption 6.4 .0 .0 100.0 color.gif

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Site-specific Targeted Monitoring Results

Causes of Impairment
Guam Wetlands 2010

Description of this table
PCB(s) in Fish Tissue Polychlorinated Biphenyls (PCBs) color.gif 6.4

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Site-specific Targeted Monitoring Results

Probable Sources
Guam Wetlands 2010

No probable sources of impairments reported.

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Guam Causes of Impairment for Reporting Year 2010


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.
Size of Assessed Waters with Listed Causes of Impairment
Ammonia 1.1
Dioxins .6
Metals (other than Mercury) 1.1 2.0
Nutrients 1.4 .7
Organic Enrichment/Oxygen Depletion 5.5 .7
Other Cause .4
Pathogens 6.7 .7 15.5
Pesticides 2.6
Polychlorinated Biphenyls (PCBs) 1.2 11.7 .7 6.4
Salinity/Total Dissolved Solids/Chlorides/Sulfates 1.3
Temperature 1.1
Toxic Inorganics 2.0
Toxic Organics 2.0
Turbidity 22.9

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Guam Probable Sources Contributing to Impairments
for Reporting Year 2010

No probable sources reported.

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Guam TMDL Alternatives by Cause of Impairment 2010


No TMDL Alternatives reported.

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Guam 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.

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Guam 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.
Pathogens color.gif 37
Metals (other than Mercury) color.gif 15
Polychlorinated Biphenyls (PCBs) color.gif 12
Nutrients color.gif 5
Organic Enrichment/Oxygen Depletion color.gif 5
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 5
Turbidity color.gif 4
Pesticides color.gif 3
Temperature color.gif 2
Toxic Organics color.gif 2
Ammonia color.gif 2
Toxic Inorganics color.gif 1
Other Cause color.gif 1

Total: 94 Causes of Impairment

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Guam 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.