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- Puerto Rico 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
Waterbody Changes from Prior Cycle
For More Information:
Puerto Rico Water Quality Assessment Report
Assessed Waters of Puerto Rico by Watershed
Search for a waterbody within Puerto Rico
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.
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.
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- About This Database (Integrated Report)
- Assessing Water Quality (Questions and Answers)
- Integrated Reporting Guidance
- Previous National Water Quality Reports
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- Statewide Statistical Surveys
- How's My Waterway Local Search tool
- Pollution Categories Summary Document
Site-specific Targeted Monitoring Summary Results
Puerto Rico (2006)
Description of this table| Size of Water | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rivers and Streams (Miles) |
Lakes, Reservoirs, and Ponds (Acres) |
Bays and Estuaries (Square Miles) |
|||||||||||||
| Good Waters | 31.5 | 871.0 | |||||||||||||
| Previously impaired waters now attaining all uses |
98.1 | ||||||||||||||
| 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 | 132.6 | .0 | .0 | ||||||||||||
| Remaining TMDLs needed | 3,286.6 | 6,495.5 | 1.0 | ||||||||||||
 |
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| 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
Site-specific Targeted Monitoring Results
Puerto Rico Rivers and Streams 2006
Description of this table
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Puerto Rico 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 |
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 % Impaired |
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| 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 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Puerto Rico Rivers and Streams 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Miles Threatened or Impaired |
|---|---|---|
| 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 |
Site-specific Targeted Monitoring Results
Probable Sources
Puerto Rico Rivers and Streams 2006
Description of this table
| Probable Source | Probable Source Group | Miles Threatened or Impaired |
|---|---|---|
| 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 Discharges/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 Discharges/Sewage | 1,069.7 |
| Municipal Point Source Discharges | Municipal Discharges/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 Discharges/Sewage | 115.1 |
| Source Unknown | Unknown | 62.4 |
| Surface Mining | Resource Extraction | 56.8 |
| Mine Tailings | Resource Extraction | 56.8 |
Site-specific Targeted Monitoring Results
Puerto Rico Lakes, Reservoirs, and Ponds 2006
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Puerto Rico 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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| 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 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Puerto Rico Lakes, Reservoirs, and Ponds 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Acres Threatened or Impaired |
|---|---|---|
| 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 |
Site-specific Targeted Monitoring Results
Probable Sources
Puerto Rico Lakes, Reservoirs, and Ponds 2006
Description of this table
| Probable Source | Probable Source Group | Acres Threatened or Impaired |
|---|---|---|
| On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Discharges/Sewage | 4,977.5 |
| Impacts From Land Application Of Wastes | Land Application/Waste Sites/Tanks | 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 Discharges/Sewage | 1,237.5 |
| Municipal Point Source Discharges | Municipal Discharges/Sewage | 1,194.0 |
| Upstream Impoundments (E.G., Pl-566 Nrcs Structures) | Hydromodification | 713.0 |
| Impacts From Hydrostructure Flow Regulation/Modification | Hydromodification | 713.0 |
| Package Plant Or Other Permitted Small Flows Discharges | Municipal Discharges/Sewage | 634.0 |
| Speciality Crop Production | Agriculture | 634.0 |
| Crop Production (Crop Land Or Dry Land) | Agriculture | 634.0 |
Site-specific Targeted Monitoring Results
Puerto Rico Bays and Estuaries 2006
Description of this table
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Description of this table
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Site-specific Targeted Monitoring Results
Individual Designated Use Support
Puerto Rico Bays and Estuaries 2006
* Waters assessed for more than one designated use are included in multiple designated use groups below.
Description of this table| Designated Use | Square Miles Assessed | Percent Good | Percent Threatened | Percent Impaired | % Good |
|---|---|---|---|---|---|
| % 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 | |
Site-specific Targeted Monitoring Results
Causes of Impairment
Puerto Rico Bays and Estuaries 2006
Description of this table
| Cause of Impairment | Cause of Impairment Group | Square Miles Threatened or Impaired |
|---|---|---|
| Arsenic | Metals (other than Mercury) | .0 |
| Cause Unknown | Cause Unknown | .0 |
Site-specific Targeted Monitoring Results
Probable Sources
Puerto Rico Bays and Estuaries 2006
Description of this table
| Probable Source | Probable Source Group | Square Miles Threatened or Impaired |
|---|---|---|
| On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems) | Municipal Discharges/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. 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) |
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 | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 Discharges/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 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 |
|---|---|---|
| 2004 | 1 |
1 |
| 2010 | 1 |
1 |
Puerto Rico 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) | 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 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 |  313 |
313 |
| Biochemical Oxygen Demand (BOD) | 4 |
4 |
| Copper | 2 |
2 |
| Total Ammonia | 2 |
2 |
Total: 321 TMDLs; 321 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 |
|---|---|---|
| 2002 | 14 |
14 |
| 2003 | 4 |
4 |
| 2007 | 27 |
27 |
| 2008 | 8 |
8 |
| 2010 | 52 |
52 |
| 2011 | 118 |
118 |
| 2012 | 98 |
98 |
Total: 321 TMDLs; 321 Causes of Impairment Addressed