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Puerto Rico Assessment Summary for Reporting Year 2006

	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	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

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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

Description of this table Assessed Status Miles Assessed 3,450.7 Unassessed 1,943.3 Total Miles 5,394.0

Description of this table Attainment Status Miles Good 31.5 Threatened .0 Impaired 3,419.2 Total Miles Assessed 3,450.7

Description of this table TMDL Development Status Miles All TMDLs completed .0 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 3,419.2 Total Threatened and Impaired 3,419.2

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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.

Designated Use	Miles Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
					% 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

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Puerto Rico Causes of Impairment
for Threatened and Impaired Rivers and Streams
Reporting Year 2006

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

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Puerto Rico Probable Sources of Impairments
for Threatened and Impaired Rivers and Streams
Reporting Year 2006

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 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

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Puerto Rico Assessed Waters
Summary of Water Quality Attainment for Lakes, Reservoirs, and Ponds
Reporting Year 2006

Description of this table Assessed Status Acres Assessed 7,366.5 Unassessed 4,779.5 Total Acres 12,146.0

Description of this table Attainment Status Acres Good 871.0 Threatened .0 Impaired 6,495.5 Total Acres Assessed 7,366.5

Description of this table TMDL Development Status Acres All TMDLs completed .0 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 6,495.5 Total Threatened and Impaired 6,495.5

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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.

Designated Use	Acres Assessed	Percent Good	Percent Threatened	Percent Impaired	% Good
					% 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

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Puerto Rico Causes of Impairment
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2006

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

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Puerto Rico Probable Sources of Impairments
for Threatened and Impaired Lakes, Reservoirs, and Ponds
Reporting Year 2006

Probable Source	Probable Source Group	Acres Threatened or Impaired
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

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Puerto Rico Assessed Waters
Summary of Water Quality Attainment for Bays and Estuaries
Reporting Year 2006

Description of this table Pie chart not displayed because total size for Bays and Estuaries is unavailable. Assessed Status Square Miles Assessed .0 Unassessed Unavailable Total Square Miles Unavailable

Description of this table Attainment Status Square Miles Good .0 Threatened .0 Impaired 1.0 Total Square Miles Assessed .0

Description of this table TMDL Development Status Square Miles All TMDLs completed .0 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 1.0 Total Threatened and Impaired 1.0

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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.

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

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Puerto Rico Causes of Impairment
for Threatened and Impaired Bays and Estuaries
Reporting Year 2006

Cause of Impairment	Cause of Impairment Group	Square Miles Threatened or Impaired
Arsenic	Metals (other than Mercury)	.0
Cause Unknown	Cause Unknown	.0

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Puerto Rico Probable Sources of Impairments
for Threatened and Impaired Bays and Estuaries
Reporting Year 2006

Probable Source	Probable Source Group	Square Miles Threatened or Impaired
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

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Puerto Rico Causes of Impairment for Reporting Year 2006

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Puerto Rico Probable Sources Contributing to Impairments
for Reporting Year 2006

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Puerto Rico TMDL Alternatives by Cause of Impairment 2006

No TMDL Alternatives reported.

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Puerto Rico Previously Impaired Waters Now Attaining All Uses

NOTE: 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
2004	1	1

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Puerto Rico Causes of Impairment for 303(d) Listed Waters

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

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Puerto Rico Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

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	45	45
Biochemical Oxygen Demand (BOD)	4	4
Copper	2	2
Total Ammonia	2	2

Total: 53 TMDLs; 53 Causes of Impairment Addressed

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Puerto Rico Cumulative Number of TMDLs

EPA Fiscal Year starts October 1 and ends September 30.

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

Total: 53 TMDLs; 53 Causes of Impairment Addressed

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TMDL Document Search

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