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Region 9 Summary of State Information

Map of the Region 9





Guam
Trust Territories
American Somoa
Northern Mariana Islands
Connecticut Maine Massachusetts New Hampshire Rhode Island Vermont New Jersey New York Puerto Rico U.S. Virgin Islands Delaware District of Columbia Maryland Pennsylvania Virginia West Virginia Alabama Florida Georgia Kentucky Mississippi North Carolina South Carolina Tennessee Illinois Indiana Michigan Minnesota Ohio Wisconsin Arkansas Louisiana New Mexico Oklahoma Texas Iowa Kansas Missouri Nebraska Colorado Montana North Dakota South Dakota Utah Wyoming Arizona California Hawaii Nevada Alaska Idaho Oregon Washington

Depicted below are regional summary tables and charts for available water quality data reported by the States to EPA under Section 305(b) and 303(d) of the Clean Water Act.

This report displays the most current available reporting year data.
Check the Status of Available Data for more information.


Frequent Questions


Assessed Waters of Region 9

Incomplete state reported information may lead to discrepancies and/or missing information in these reports.

Description of this table
  Size of Water
Rivers and
Streams (Miles)		 Lakes, Reservoirs,
and Ponds (Acres)		 Bays and
Estuaries
(Square Miles)		 Coastal
Shoreline
(Miles)		 Ocean and
Near Coastal
(Square Miles)		 Wetlands
(Acres)
   Good Waters 4,914 248,599 5 652 489 27,295
   Threatened Waters 1,507 18,948 17 805
   Impaired Waters 33,899 1,197,827 933 342 1 212,105
Total Assessed Waters 40,320 1,465,375 955 994 490 240,205
Total Waters 321,828 2,975,059 19,098 1,318 Unavailable 494,226
Percent of Waters Assessed 12.5 49.3 5.0 75.4 Unavailable 48.6

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Summary of Water Quality Assessments for Each Waterbody Type


Region 9
Water Quality Attainment in Assessed Rivers and Streams

Description of this table
Assessed Status Miles
Assessed 40,320
Unassessed 281,508
Total Miles 321,828







arrow pointing right 		Description of this table
Attainment Status Miles
Good 4,914
Threatened 1,507
Impaired 33,899
Total Miles Assessed 40,320

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Region 9
Designated Use Support in Assessed Rivers and Streams*

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

Description of this table
Designated Use Group Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 36,803 7.5 4.0 88.5 color.gifcolor.gifcolor.gif
Recreation Recreation 20,697 21.7 7.3 71.0 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 15,794 35.4 9.1 55.5 color.gifcolor.gifcolor.gif
Agricultural Agricultural 15,712 48.4 8.7 42.9 color.gifcolor.gifcolor.gif
Hydropower Generation Other 14,869 7.4 1.7 90.8 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 13,137 7.2 4.9 87.9 color.gifcolor.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 12,813 3.6 5.0 91.4 color.gifcolor.gifcolor.gif
Industrial Industrial 11,772 30.7 .5 68.9 color.gifcolor.gifcolor.gif

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Region 9
Causes of Impairment in Assessed Rivers and Streams

Description of this table
Cause of Impairment Group Miles
Threatened or
Impaired
Nutrients color.gif 13,307
Habitat Alterations color.gif 12,769
Flow Alteration(s) color.gif 9,663
Organic Enrichment/Oxygen Depletion color.gif 7,322
Pathogens color.gif 6,110
Other Cause color.gif 5,209
Metals (other than Mercury) color.gif 4,835
Pesticides color.gif 3,679
Total Toxics color.gif 1,386
Temperature color.gif 1,023
Turbidity color.gif 904
Toxic Inorganics color.gif 586
Toxic Organics color.gif 466
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 431
pH/Acidity/Caustic Conditions color.gif 312
Mercury color.gif 217
Sediment color.gif 198
Algal Growth color.gif 140
Cause Unknown color.gif 106
Ammonia color.gif 47
Radiation color.gif 22
Taste, Color and Odor color.gif 7
Chlorine color.gif 6
Trash color.gif 1

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Region 9
Probable Sources of Impairments in Assessed Rivers and Streams

Description of this table
Probable Source Group Miles
Threatened or
Impaired
Hydromodification color.gif 20,475
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 18,142
Unspecified Nonpoint Source color.gif 17,625
Agriculture color.gif 17,493
Silviculture (Forestry) color.gif 15,289
Natural/Wildlife color.gif 14,224
Resource Extraction color.gif 8,036
Construction color.gif 7,332
Other color.gif 4,393
Unknown color.gif 2,920
Land Application/Waste Sites/Tanks color.gif 1,796
Industrial color.gif 1,313
Urban-Related Runoff/Stormwater color.gif 1,273
Municipal Dishcarges/Sewage color.gif 1,257
Recreation And Tourism (Non-Boating) color.gif 571
Groundwater Loadings/Withdrawals color.gif 115
Spills/Dumping color.gif 93
Legacy/Historical Pollutants color.gif 85
Atmospheric Deposition color.gif 25
Aquaculture color.gif 8

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Region 9
Water Quality Attainment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Assessed Status Acres
Assessed 1,465,375
Unassessed 1,509,684
Total Acres 2,975,059







arrow pointing right 		Description of this table
Attainment Status Acres
Good 248,599
Threatened 18,948
Impaired 1,197,827
Total Acres Assessed 1,465,375

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Region 9
Designated Use Support in Assessed Lakes, Reservoirs, and Ponds*

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

Description of this table
Designated Use Group Acres Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 1,235,369 14.9 1.5 83.6 color.gifcolor.gifcolor.gif
Recreation Recreation 1,165,308 29.6 6.7 63.7 color.gifcolor.gifcolor.gif
Industrial Industrial 1,007,655 53.6 .3 46.1 color.gifcolor.gifcolor.gif
Public Water Supply Public Water Supply 800,714 35.9 5.1 59.1 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 745,156 8.6 7.5 83.9 color.gifcolor.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 732,768 16.1 15.6 68.3 color.gifcolor.gifcolor.gif
Hydropower Generation Other 690,152 4.8 1.4 93.8 color.gifcolor.gifcolor.gif
Agricultural Agricultural 618,129 47.8 6.2 46.0 color.gifcolor.gifcolor.gif
Aesthetic Value Aesthetic Value 122,800 .0 .0 100.0 color.gif

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Region 9
Causes of Impairment in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Metals (other than Mercury) color.gif 642,156
Nutrients color.gif 528,661
Flow Alteration(s) color.gif 337,375
Pathogens color.gif 272,132
Organic Enrichment/Oxygen Depletion color.gif 161,953
Habitat Alterations color.gif 156,072
Turbidity color.gif 136,980
Algal Growth color.gif 112,245
Pesticides color.gif 92,164
Toxic Organics color.gif 88,881
Mercury color.gif 52,804
Radiation color.gif 48,264
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 36,347
Total Toxics color.gif 10,988
pH/Acidity/Caustic Conditions color.gif 6,544
Temperature color.gif 4,963
Cause Unknown color.gif 3,491
Toxic Inorganics color.gif 3,218
Ammonia color.gif 1,456
Other Cause color.gif 862
Nuisance Native Species color.gif 15

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Region 9
Probable Sources of Impairments in Assessed Lakes, Reservoirs, and Ponds

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Natural/Wildlife color.gif 618,538
Agriculture color.gif 460,647
Hydromodification color.gif 305,135
Other color.gif 237,506
Unspecified Nonpoint Source color.gif 218,833
Unknown color.gif 216,163
Resource Extraction color.gif 204,147
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 118,576
Construction color.gif 110,616
Urban-Related Runoff/Stormwater color.gif 108,815
Recreational Boating And Marinas color.gif 108,232
Silviculture (Forestry) color.gif 107,007
Groundwater Loadings/Withdrawals color.gif 97,931
Commercial Harbor And Port Activities color.gif 86,194
Land Application/Waste Sites/Tanks color.gif 32,851
Industrial color.gif 21,253
Recreation And Tourism (Non-Boating) color.gif 9,010
Atmospheric Deposition color.gif 3,927
Municipal Dishcarges/Sewage color.gif 520
Legacy/Historical Pollutants color.gif 185

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Region 9
Water Quality Attainment in Assessed Bays and Estuaries

Description of this table
Assessed Status Square Miles
Assessed 955
Unassessed 18,143
Total Square Miles 19,098







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 5
Threatened 17
Impaired 933
Total Square Miles Assessed 955

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Region 9
Designated Use Support in Assessed Bays and Estuaries*

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

Description of this table
Designated Use Group Square Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 904 .6 1.9 97.6 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 892 .7 1.8 97.5 color.gifcolor.gifcolor.gif
Recreation Recreation 838 80.8 .1 19.1 color.gifcolor.gifcolor.gif
Industrial Industrial 541 72.7 .0 27.3 color.gifcolor.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 533 .8 .0 99.2 color.gifcolor.gif
Hydropower Generation Other 290 13.4 .0 86.6 color.gifcolor.gif
Public Water Supply Public Water Supply 164 .0 .0 100.0 color.gif
Agricultural Agricultural 53 .0 .0 100.0 color.gif

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Region 9
Causes of Impairment in Assessed Bays and Estuaries

Description of this table
Cause of Impairment Group Square Miles
Threatened or
Impaired
Toxic Organics color.gif 855
Pesticides color.gif 842
Metals (other than Mercury) color.gif 746
Total Toxics color.gif 312
Flow Alteration(s) color.gif 299
Habitat Alterations color.gif 262
Other Cause color.gif 234
Pathogens color.gif 84
Nutrients color.gif 52
Turbidity color.gif 28
Organic Enrichment/Oxygen Depletion color.gif 26
Ammonia color.gif 20
Cause Unknown color.gif 13
Algal Growth color.gif 13
Polychlorinated Biphenyls (PCBs) color.gif 13
Toxic Inorganics color.gif 1

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Region 9
Probable Sources of Impairments in Assessed Bays and Estuaries

Description of this table
Probable Source Group Square Miles
Threatened or
Impaired
Natural/Wildlife color.gif 731
Hydromodification color.gif 609
Resource Extraction color.gif 582
Agriculture color.gif 573
Unspecified Nonpoint Source color.gif 540
Commercial Harbor And Port Activities color.gif 470
Other color.gif 174
Groundwater Loadings/Withdrawals color.gif 158
Unknown color.gif 153
Land Application/Waste Sites/Tanks color.gif 41
Industrial color.gif 36
Municipal Dishcarges/Sewage color.gif 34
Urban-Related Runoff/Stormwater color.gif 30
Recreational Boating And Marinas color.gif 30
Spills/Dumping color.gif 25
Construction color.gif 16
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 0
Recreation And Tourism (Non-Boating) color.gif 0

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Region 9
Water Quality Attainment in Assessed Coastal Shoreline

Description of this table
Assessed Status Miles
Assessed 994
Unassessed 324
Total Miles 1,318







arrow pointing right 		Description of this table
Attainment Status Miles
Good 652
Threatened 0
Impaired 342
Total Miles Assessed 994

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Region 9
Designated Use Support in Assessed Coastal Shoreline*

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

Description of this table
Designated Use Group Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 766 79.1 .0 20.9 color.gifcolor.gif
Recreation Recreation 686 76.7 .0 23.3 color.gifcolor.gif
Hydropower Generation Other 680 73.9 .0 26.1 color.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 638 82.9 .0 17.1 color.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 328 80.1 .0 19.9 color.gifcolor.gif
Industrial Industrial 278 77.6 .0 22.4 color.gifcolor.gif
Agricultural Agricultural 50 .0 .0 100.0 color.gif
Public Water Supply Public Water Supply 49 .0 .0 100.0 color.gif

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Region 9
Causes of Impairment in Assessed Coastal Shoreline

Description of this table
Cause of Impairment Group Miles
Threatened or
Impaired
Pathogens color.gif 223
Metals (other than Mercury) color.gif 156
Pesticides color.gif 63
Turbidity color.gif 62
Nutrients color.gif 39
Algal Growth color.gif 38
Cause Unknown color.gif 31
Other Cause color.gif 20
Ammonia color.gif 13
Toxic Organics color.gif 13
Polychlorinated Biphenyls (PCBs) color.gif 8
Mercury color.gif 8
Cause Unknown - Impaired Biota color.gif 0
Organic Enrichment/Oxygen Depletion color.gif 0

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Region 9
Probable Sources of Impairments in Assessed Coastal Shoreline

Description of this table
Probable Source Group Miles
Threatened or
Impaired
Natural/Wildlife color.gif 100
Unspecified Nonpoint Source color.gif 89
Other color.gif 34
Commercial Harbor And Port Activities color.gif 20
Recreation And Tourism (Non-Boating) color.gif 20
Agriculture color.gif 16
Resource Extraction color.gif 12
Urban-Related Runoff/Stormwater color.gif 5
Unknown color.gif 3
Construction color.gif 3
Land Application/Waste Sites/Tanks color.gif 1
Industrial color.gif 1
Recreational Boating And Marinas color.gif 1

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Region 9
Water Quality Attainment in Assessed Ocean and Near Coastal

Description of this table
Pie chart not displayed because total size for Ocean and Near Coastal is unavailable.
Assessed Status Square Miles
Assessed 490
Unassessed Unavailable
Total Square Miles Unavailable







arrow pointing right 		Description of this table
Attainment Status Square Miles
Good 489
Threatened 0
Impaired 1
Total Square Miles Assessed 490

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Region 9
Designated Use Support in Assessed Ocean and Near Coastal*

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

Description of this table
Designated Use Group Square Miles Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 490 99.9 .0 .1 color.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 486 100.0 .0 .0 color.gif
Recreation Recreation 486 100.0 .0 .0 color.gif
Public Water Supply Public Water Supply 154 100.0 .0 .0 color.gif
Hydropower Generation Other 100 99.4 .0 .6 color.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 99 100.0 .0 .0 color.gif
Industrial Industrial 3 100.0 .0 .0 color.gif

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Region 9
Causes of Impairment in Assessed Ocean and Near Coastal

No causes of impairment reported.

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Region 9
Probable Sources of Impairments in Assessed Ocean and Near Coastal

No probable sources of impairments reported.

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Region 9
Water Quality Attainment in Assessed Wetlands

Description of this table
Assessed Status Acres
Assessed 240,205
Unassessed 254,021
Total Acres 494,226







arrow pointing right 		Description of this table
Attainment Status Acres
Good 27,295
Threatened 805
Impaired 212,105
Total Acres Assessed 240,205

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Region 9
Designated Use Support in Assessed Wetlands*

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

Description of this table
Designated Use Group Acres Assessed Percent Good Percent Threatened Percent Impaired % Good
% Threatened
% Impaired
Fish, Shellfish, and Wildlife Protection and Propagation Fish, Shellfish, And Wildlife Protection And Propagation 238,198 11.5 .3 88.2 color.gifcolor.gifcolor.gif
Exceptional Recreational or Ecological Significance Exceptional Recreational Or Ecological Significance 141,544 8.3 44.6 47.2 color.gifcolor.gifcolor.gif
Recreation Recreation 108,536 26.9 61.8 11.3 color.gifcolor.gifcolor.gif
Aquatic Life Harvesting Aquatic Life Harvesting 90,292 .2 .0 99.8 color.gifcolor.gif
Industrial Industrial 84,516 25.0 .0 75.0 color.gifcolor.gif
Public Water Supply Public Water Supply 82,403 19.1 .2 80.7 color.gifcolor.gifcolor.gif
Hydropower Generation Other 66,403 .0 .0 100.0 color.gif
Agricultural Agricultural 32,465 47.9 .6 51.5 color.gifcolor.gifcolor.gif

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Region 9
Causes of Impairment in Assessed Wetlands

Description of this table
Cause of Impairment Group Acres
Threatened or
Impaired
Metals (other than Mercury) color.gif 166,952
Habitat Alterations color.gif 105,679
Nutrients color.gif 66,824
Organic Enrichment/Oxygen Depletion color.gif 66,522
Flow Alteration(s) color.gif 27,844
Mercury color.gif 26,746
Toxic Inorganics color.gif 21,473
Total Toxics color.gif 12,659
Pathogens color.gif 12,058
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 3,683
pH/Acidity/Caustic Conditions color.gif 3,683
Pesticides color.gif 362
Toxic Organics color.gif 133
Polychlorinated Biphenyls (PCBs) color.gif 6
Radiation color.gif 2

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Region 9
Probable Sources of Impairments in Assessed Wetlands

Description of this table
Probable Source Group Acres
Threatened or
Impaired
Agriculture color.gif 172,610
Natural/Wildlife color.gif 117,440
Hydromodification color.gif 94,185
Resource Extraction color.gif 89,353
Other color.gif 65,637
Unspecified Nonpoint Source color.gif 62,901
Construction color.gif 12,971
Unknown color.gif 5,603
Groundwater Loadings/Withdrawals color.gif 3,045
Recreation And Tourism (Non-Boating) color.gif 787
Land Application/Waste Sites/Tanks color.gif 496
Habitat Alterations (Not Directly Related To Hydromodification) color.gif 337
Silviculture (Forestry) color.gif 2
Urban-Related Runoff/Stormwater color.gif 2

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Region 9 Causes of Impairment


Description of this table
NOTE: Click on a cause of impairment (e.g. algal growth) to see the specific state-reported causes that are grouped to make up this category.
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)		 Coastal
Shoreline
(Miles)		 Wetlands
(Acres)
Algal Growth 140 112,245 13 38  
Ammonia 47 1,456 20 13  
Cause Unknown 106 3,491 13 31  
Cause Unknown - Impaired Biota       0  
Chlorine 6        
Fish Consumption Advisory       0  
Flow Alteration(s) 9,663 337,375 299   27,844
Habitat Alterations 12,769 156,072 262   105,679
Mercury 217 52,804   8 26,746
Metals (other than Mercury) 4,835 642,156 746 156 166,952
Nuisance Native Species   15      
Nutrients 13,307 528,661 52 39 66,824
Organic Enrichment/Oxygen Depletion 7,322 161,953 26 0 66,522
Other Cause 5,209 862 234 20  
Pathogens 6,110 272,132 84 223 12,058
Pesticides 3,679 92,164 842 63 362
pH/Acidity/Caustic Conditions 312 6,544     3,683
Polychlorinated Biphenyls (PCBs)     13 8 6
Radiation 22 48,264     2
Salinity/Total Dissolved Solids/Chlorides/Sulfates 431 36,347     3,683
Sediment 198        
Taste, Color and Odor 7        
Temperature 1,023 4,963      
Total Toxics 1,386 10,988 312   12,659
Toxic Inorganics 586 3,218 1   21,473
Toxic Organics 466 88,881 855 13 133
Trash 1   0    
Turbidity 904 136,980 28 62  

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Region 9 Probable Sources Contributing to Impairments

Description of this table
NOTE: Click on a source of impairment (e.g. agriculture) to see the specific state-reported sources that are grouped to make up this category.
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)		 Coastal
Shoreline
(Miles)		 Wetlands
(Acres)
Agriculture 17,493 460,647 573 16 172,610
Aquaculture 8        
Atmospheric Deposition 25 3,927      
Commercial Harbor And Port Activities   86,194 470 20  
Construction 7,332 110,616 16 3 12,971
Groundwater Loadings/Withdrawals 115 97,931 158   3,045
Habitat Alterations (Not Directly Related To Hydromodification) 18,142 118,576 0   337
Hydromodification 20,475 305,135 609   94,185
Industrial 1,313 21,253 36 1  
Land Application/Waste Sites/Tanks 1,796 32,851 41 1 496
Legacy/Historical Pollutants 85 185      
Municipal Dishcarges/Sewage 1,257 520 34    
Natural/Wildlife 14,224 618,538 731 100 117,440
Other 4,393 237,506 174 34 65,637
Recreation And Tourism (Non-Boating) 571 9,010 0 20 787
Recreational Boating And Marinas   108,232 30 1  
Resource Extraction 8,036 204,147 582 12 89,353
Silviculture (Forestry) 15,289 107,007     2
Spills/Dumping 93   25    
Unknown 2,920 216,163 153 3 5,603
Unspecified Nonpoint Source 17,625 218,833 540 89 62,901
Urban-Related Runoff/Stormwater 1,273 108,815 30 5 2

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Region 9 Previously Impaired Waters Now Attaining All Uses

Description of this table
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
2009 color.gif 1 1

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Region 9
Impaired Waters Listed By State

Description of this table
State Name Number of Waters on 303(d) List
American Samoa color.gif 42
Arizona color.gif 68
California color.gif 691
Guam color.gif 54
Hawaii color.gif 311
N. Mariana Islands color.gif 71
Nevada color.gif 129

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Region 9 Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Pollutant Group" value to see a detailed list of pollutants. Click on the underlined "Number of TMDLs" value to see a listing of those TMDLs for the pollutant Group.
Pollutant Group Number of TMDLs Number of Causes of
Impairment Addressed
Pesticides color.gif 236 275
Metals (other than Mercury) color.gif 167 168
Nutrients color.gif 166 261
Pathogens color.gif 164 230
Trash color.gif 65 68
Sediment color.gif 64 69
Turbidity color.gif 58 60
Total Toxics color.gif 49 49
Ammonia color.gif 43 84
Salinity/Total Dissolved Solids/Chlorides/Sulfates color.gif 39 40
Mercury color.gif 24 24
Polychlorinated Biphenyls (PCBs) color.gif 23 24
Organic Enrichment/Oxygen Depletion color.gif 15 15
Temperature color.gif 14 14
Algal Growth color.gif 9 11
Other Cause color.gif 9 9
pH/Acidity/Caustic Conditions color.gif 8 8
Toxic Inorganics color.gif 4 4
Toxic Organics color.gif 1 1

Total: 1,158 TMDLs; 1,414 Causes of Impairment Addressed

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Region 9 Approved TMDLs By State

This chart includes TMDLs since October 1, 1995.

Description of this table
State Name Number of TMDLs
American Samoa color.gif 2
Arizona color.gif 72
California color.gif 989
Guam color.gif 1
Hawaii color.gif 120
Nevada color.gif 82

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Region 9 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 color.gif 2 2
1998 color.gif 13 13
1999 color.gif 20 23
2000 color.gif 35 39
2001 color.gif 10 10
2002 color.gif 123 126
2003 color.gif 172 266
2004 color.gif 92 176
2005 color.gif 67 71
2006 color.gif 231 272
2007 color.gif 183 187
2008 color.gif 110 110
2009 color.gif 80 87
2010 color.gif 20 32

Total: 1,158 TMDLs; 1,414 Causes of Impairment Addressed

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Status of Available Data Used in This Report

Description of this table
State Name Assessed Waters Report Year Impaired Waters Report Year
American Samoa 2008 2008
Arizona 2008 2004
California 2004 2006
Guam 2008 2008
Hawaii 2006 2006
N. Mariana Islands 2008 2008
Nevada 2006 2004


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