On This Page
- Puerto Rico Assessment Summary
- Water Quality by Waterbody Type
- Causes of Impairment
- Probable Sources Contributing to Impairments
- Previously Impaired Waters Now Attaining All Uses
- TMDL Alternatives by Cause of Impairment
- Cumulative TMDLs by Pollutant
- Cumulative Number of TMDLs
Data are also available for these years: 2002 2004
Waterbody Changes from Prior Cycle
Comparison Summary by Reporting Year
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Puerto Rico 2006 Water Quality Assessment Report
NOTE: The data provided in this report differs slightly from the information provided in the original Puerto Rico 2006 305(b) report. This is a result of differences between the Puerto Rico assessment database and the summary data provided in Puerto Rico's 2006 Integrated Report.
Puerto Rico Assessment Summary for Reporting Year 2006
Description of this tableSize of Water | |||||||||||||||
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Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Bays and Estuaries (Square Miles) |
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Good Waters | 31.5 | 871.0 | |||||||||||||
Previously impaired waters now attaining all uses |
20.4 | ||||||||||||||
Threatened Waters | |||||||||||||||
TMDL completed | |||||||||||||||
TMDL alternative | |||||||||||||||
Non-pollutant impairment | |||||||||||||||
TMDL needed | |||||||||||||||
Impaired Waters | 3,419.2 | 6,495.5 | 1.0 | ||||||||||||
TMDL completed | |||||||||||||||
TMDL alternative | |||||||||||||||
Non-pollutant impairment | |||||||||||||||
TMDL needed | 3,419.2 | 6,495.5 | 1.0 | ||||||||||||
New TMDLs completed | .0 | .0 | .0 | ||||||||||||
Remaining TMDLs needed | 3,419.2 | 6,495.5 | 1.0 | ||||||||||||
Total Assessed Waters | 3,450.7 | 7,366.5 | 1.0 | ||||||||||||
Total Waters | 5,394.0 | 12,146.0 | Unavailable | ||||||||||||
Percent of Waters Assessed | 64.0 | 60.6 | Unavailable |
Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2006
Puerto Rico Assessed Waters
Summary of Water Quality Attainment for Rivers and Streams
Reporting Year 2006
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Puerto Rico Assessed Waters
Designated Use Support for Rivers and Streams
Reporting Year 2006*
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this tableDesignated Use | Miles Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
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% Threatened | |||||
% Impaired | |||||
Aquatic Life | 3,450.7 | 7.4 | .0 | 92.6 | |
Primary Contact Recreation | 3,450.7 | 5.5 | .0 | 94.5 | |
Public Water Supply | 3,438.8 | 15.4 | .0 | 84.6 | |
Secondary Contact Recreation | 3,450.7 | 45.1 | .0 | 54.9 |
Puerto Rico Causes of Impairment
for Threatened and Impaired Rivers and Streams
Reporting Year 2006
Description of this table
Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
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Cause Unknown | Cause Unknown | 2,806.7 |
Arsenic | Metals (other than Mercury) | 1,937.7 |
Copper | Metals (other than Mercury) | 836.1 |
Organic Enrichment (Sewage) Biological Indicators | Organic Enrichment/Oxygen Depletion | 422.9 |
Lead | Metals (other than Mercury) | 315.8 |
Cadmium | Metals (other than Mercury) | 177.4 |
Selenium | Metals (other than Mercury) | 77.7 |
Ammonia, Un-ionized | Ammonia | 48.5 |
Mercury | Mercury | 42.4 |
Cyanide | Toxic Inorganics | 22.0 |
Phosphorus, Total | Nutrients | 14.6 |
Nutrient/Eutrophication Biological Indicators | Nutrients | 14.6 |
Puerto Rico Probable Sources of Impairments
for Threatened and Impaired Rivers and Streams
Reporting Year 2006
Description of this table
Probable Source | Probable Source Group | Miles Threatened or Impaired |
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Impacts From Land Application Of Wastes | Land Application/Waste Sites/Tanks | 2,704.9 |
On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Dishcarges/Sewage | 2,610.1 |
Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | 1,613.2 |
Agriculture | Agriculture | 1,157.9 |
Sanitary Sewer Overflows (Collection System Failures) | Municipal Dishcarges/Sewage | 1,069.7 |
Municipal Point Source Discharges | Municipal Dishcarges/Sewage | 1,014.4 |
Permitted Runoff From Confined Animal Feeding Operations (Cafos) | Agriculture | 969.7 |
Animal Feeding Operations (Nps) | Agriculture | 931.6 |
Industrial Point Source Discharge | Industrial | 641.0 |
Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | 372.6 |
Landfills | Land Application/Waste Sites/Tanks | 290.3 |
Speciality Crop Production | Agriculture | 195.2 |
Crop Production (Crop Land Or Dry Land) | Agriculture | 195.2 |
Upstream Impoundments (E.G., Pl-566 Nrcs Structures) | Hydromodification | 178.8 |
Package Plant Or Other Permitted Small Flows Discharges | Municipal Dishcarges/Sewage | 115.1 |
Source Unknown | Unknown | 62.4 |
Surface Mining | Resource Extraction | 56.8 |
Mine Tailings | Resource Extraction | 56.8 |
Puerto Rico Assessed Waters
Summary of Water Quality Attainment for Lakes, Reservoirs, and Ponds
Reporting Year 2006
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Puerto Rico Assessed Waters
Designated Use Support for Lakes, Reservoirs, and Ponds
Reporting Year 2006*
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this tableDesignated Use | Acres Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
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% Threatened | |||||
% Impaired | |||||
Aquatic Life | 7,366.5 | 12.8 | .0 | 87.2 | |
Primary Contact Recreation | 7,366.5 | 78.7 | .0 | 21.3 | |
Public Water Supply | 7,366.5 | 73.5 | .0 | 26.5 | |
Secondary Contact Recreation | 7,366.5 | 82.2 | .0 | 17.8 |
Puerto Rico Causes of Impairment
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2006
Description of this table
Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
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Organic Enrichment (Sewage) Biological Indicators | Organic Enrichment/Oxygen Depletion | 5,967.0 |
Cause Unknown | Cause Unknown | 1,237.5 |
Arsenic | Metals (other than Mercury) | 1,194.0 |
Copper | Metals (other than Mercury) | 634.0 |
Puerto Rico Probable Sources of Impairments
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2006
Description of this table
Probable Source | Probable Source Group | Acres Threatened or Impaired |
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Impacts From Land Application Of Wastes | Land Application/Waste Sites/Tanks | 4,977.5 |
On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Dishcarges/Sewage | 4,977.5 |
Agriculture | Agriculture | 4,628.0 |
Unspecified Urban Stormwater | Urban-Related Runoff/Stormwater | 2,731.5 |
Permitted Runoff From Confined Animal Feeding Operations (Cafos) | Agriculture | 2,584.5 |
Animal Feeding Operations (Nps) | Agriculture | 2,584.5 |
Industrial Point Source Discharge | Industrial | 2,237.5 |
Sanitary Sewer Overflows (Collection System Failures) | Municipal Dishcarges/Sewage | 1,237.5 |
Municipal Point Source Discharges | Municipal Dishcarges/Sewage | 1,194.0 |
Upstream Impoundments (E.G., Pl-566 Nrcs Structures) | Hydromodification | 713.0 |
Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | 713.0 |
Speciality Crop Production | Agriculture | 634.0 |
Crop Production (Crop Land Or Dry Land) | Agriculture | 634.0 |
Package Plant Or Other Permitted Small Flows Discharges | Municipal Dishcarges/Sewage | 634.0 |
Puerto Rico Assessed Waters
Summary of Water Quality Attainment for Bays and Estuaries
Reporting Year 2006
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Puerto Rico Assessed Waters
Designated Use Support for Bays and Estuaries
Reporting Year 2006*
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this tableDesignated Use | Square Miles Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
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% Threatened | |||||
% Impaired | |||||
Aquatic Life | 1.0 | 22.1 | .0 | 77.9 | |
Primary Contact Recreation | 1.0 | .0 | .0 | 100.0 | |
Secondary Contact Recreation | 1.0 | 7.8 | .0 | 92.2 |
Puerto Rico Causes of Impairment
for Threatened and Impaired Bays and Estuaries
Reporting Year 2006
Description of this table
Cause of Impairment | Cause of Impairment Group | Square Miles Threatened or Impaired |
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Arsenic | Metals (other than Mercury) | .0 |
Cause Unknown | Cause Unknown | .0 |
Puerto Rico Probable Sources of Impairments
for Threatened and Impaired Bays and Estuaries
Reporting Year 2006
Description of this table
Probable Source | Probable Source Group | Square Miles Threatened or Impaired |
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On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Dishcarges/Sewage | .0 |
Impacts From Land Application Of Wastes | Land Application/Waste Sites/Tanks | .0 |
Puerto Rico 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. | |||||||||||||||
Cause of Impairment Group | Size of Assessed Waters with Listed Causes of Impairment | ||||||||||||||
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Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Bays and Estuaries (Square Miles) |
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Ammonia | 48.5 | ||||||||||||||
Cause Unknown | 2,806.7 | 1,237.5 | .0 | ||||||||||||
Mercury | 42.4 | ||||||||||||||
Metals (other than Mercury) | 2,163.1 | 1,194.0 | .0 | ||||||||||||
Nutrients | 14.6 | ||||||||||||||
Organic Enrichment/Oxygen Depletion | 422.9 | 5,967.0 | |||||||||||||
Toxic Inorganics | 22.0 |
Puerto Rico 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 | ||||||||||||||
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Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Bays and Estuaries (Square Miles) |
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Agriculture | 1,477.3 | 4,671.5 | |||||||||||||
Hydromodification | 372.6 | 713.0 | |||||||||||||
Industrial | 641.0 | 2,237.5 | |||||||||||||
Land Application/Waste Sites/Tanks | 2,704.9 | 4,977.5 | .0 | ||||||||||||
Municipal Dishcarges/Sewage | 2,704.9 | 4,977.5 | .0 | ||||||||||||
Resource Extraction | 56.8 | ||||||||||||||
Unknown | 62.4 | ||||||||||||||
Urban-Related Runoff/Stormwater | 1,613.2 | 2,731.5 |
Puerto Rico TMDL Alternatives by Cause of Impairment 2006
No TMDL Alternatives reported.
Puerto Rico Previously Impaired Waters Now Attaining All Uses
Description of this tableNOTE: 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 |
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2004 | 1 | 1 |
Puerto Rico Causes of Impairment for 303(d) Listed Waters
Description of this tableNOTE: 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 |
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Metals (other than Mercury) | 155 |
Pathogens | 107 |
Toxic Inorganics | 74 |
Organic Enrichment/Oxygen Depletion | 58 |
Toxic Organics | 50 |
Turbidity | 43 |
Ammonia | 10 |
Mercury | 10 |
pH/Acidity/Caustic Conditions | 8 |
Temperature | 6 |
Nutrients | 4 |
Total: 525 Causes of Impairment
Puerto Rico Cumulative TMDLs by Pollutant
This chart includes TMDLs since October 1, 1995.
Description of this tableNOTE: 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 |
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Fecal Coliform | 45 | 45 |
Biochemical Oxygen Demand (BOD) | 4 | 4 |
Copper | 2 | 2 |
Total Ammonia | 2 | 2 |
Total: 53 TMDLs; 53 Causes of Impairment Addressed
Puerto Rico 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 |
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2002 | 14 | 14 |
2003 | 4 | 4 |
2007 | 27 | 27 |
2008 | 8 | 8 |
Total: 53 TMDLs; 53 Causes of Impairment Addressed