Site-specific Targeted Monitoring Summary Results

Arizona (2010)

	Size of Water
	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Good Waters	1,356.3	23,608.9
Previously impaired waters       now attaining all uses	162.5	40.0
Threatened Waters
TMDL completed
TMDL alternative
Non-pollutant impairment
TMDL needed
Impaired Waters	1,119.1	72,395.3
TMDL completed	301.1	2,267.2
TMDL alternative
Non-pollutant impairment		220.1
TMDL needed	818.0	69,907.9
New TMDLs completed	46.8	14.5
Remaining TMDLs needed	771.2	69,893.4
Total Assessed Waters	2,475.4	96,004.2
Total Waters	90,375.0	335,590.0
Percent of Waters Assessed	2.7	28.6

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

Site-specific Targeted Monitoring Results

Arizona Rivers and Streams 2010

Description of this table All Rivers and Streams 90,375.0 Miles of Rivers and Streams Assessed Status Miles Assessed 2,475.4 Unassessed 87,899.6 Total Miles 90,375.0

Description of this table Assessed Rivers and Streams 2,475.4 Miles of Assessed Rivers and Streams Attainment Status Miles Good 1,356.3 Threatened .0 Impaired 1,119.1 Total Miles Assessed 2,475.4

Description of this table Threatened and Impaired Rivers and Streams 1,119.1 Miles of Threatened and Impaired Rivers and Streams TMDL Development Status Miles All TMDLs completed 347.9 TMDL alternative .0 Non-pollutant impairment .0 TMDL needed 771.2 Total Threatened and Impaired 1,119.1

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Arizona Rivers and Streams 2010

* 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
Agricultural Irrigation	1,116.2	93.7	.0	6.3
Agricultural Livestock Watering	1,612.7	92.4	.0	7.6
Aquatic And Wildlife (Coldwater Fishery)	279.6	28.8	.0	71.2
Aquatic And Wildlife (Effluent Dependent Water)	64.9	.0	.0	100.0
Aquatic And Wildlife (Ephemeral)	50.9	28.6	.0	71.4
Aquatic And Wildlife (Warmwater Fishery)	1,047.5	56.4	.0	43.6
Domestic Water Source	246.5	86.9	.0	13.1
Fish Consumption	2,017.3	91.9	.0	8.1
Full Body Contact	1,322.6	66.6	.0	33.4
Partial Body Contact	63.2	18.3	.0	81.7

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Site-specific Targeted Monitoring Results

Causes of Impairment
Arizona Rivers and Streams 2010

Cause of Impairment	Cause of Impairment Group	Miles Threatened or Impaired
Escherichia Coli (E. Coli)	Pathogens	334.5
Copper	Metals (other than Mercury)	259.5
Selenium	Metals (other than Mercury)	254.7
Sedimentation/Siltation	Sediment	178.7
pH	pH/Acidity/Caustic Conditions	101.5
Chlordane	Pesticides	99.6
Toxaphene	Pesticides	99.6
DDT	Pesticides	99.6
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	97.4
Zinc	Metals (other than Mercury)	69.1
Mercury in Fish Tissue	Mercury	66.0
Boron	Toxic Inorganics	59.3
Cadmium	Metals (other than Mercury)	58.7
Ammonia, Un-ionized	Ammonia	58.5
Arsenic	Metals (other than Mercury)	35.6
Lead	Metals (other than Mercury)	35.6
Nitrogen, Total	Nutrients	24.1
Chlorine	Chlorine	20.3
Beryllium	Metals (other than Mercury)	15.8
Phosphorus, Elemental	Nutrients	8.0
Phosphorus, Total	Nutrients	7.5
Manganese	Metals (other than Mercury)	1.4

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Site-specific Targeted Monitoring Results

Probable Sources
Arizona Rivers and Streams 2010

Probable Source	Probable Source Group	Miles Threatened or Impaired
Natural Sources	Natural/Wildlife	917.8
Rangeland Grazing	Agriculture	650.5
Mine Tailings	Resource Extraction	591.4
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	577.2
Irrigated Crop Production	Agriculture	558.1
Impacts From Abandoned Mine Lands (Inactive)	Resource Extraction	555.3
Post-Development Erosion And Sedimentation	Hydromodification	531.8
Other Recreational Pollution Sources	Recreation And Tourism (Non-Boating)	531.8
Subsurface (Hardrock) Minining	Resource Extraction	500.9
Mill Tailings	Industrial	500.9
On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems)	Municipal Discharges/Sewage	499.4
Contaminated Sediments	Legacy/Historical Pollutants	479.9
Wildlife Other Than Waterfowl	Natural/Wildlife	445.9
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	407.0
Livestock (Grazing Or Feeding Operations)	Agriculture	391.2
Pipeline Breaks	Spills/Dumping	336.0
Natural Conditions - Water Quality Standards Use Attainability Analyses Needed	Natural/Wildlife	289.0
Sources Outside State Juristiction Or Borders	Other	275.7
Internal Nutrient Recycling	Natural/Wildlife	216.0
Residential Districts	Urban-Related Runoff/Stormwater	214.1
Municipal Point Source Discharges	Municipal Discharges/Sewage	208.0
Loss Of Riparian Habitat	Habitat Alterations (Not Directly Related To Hydromodification)	171.2
Woodlot Site Management	Silviculture (Forestry)	132.9
Site Clearance (Land Development Or Redevelopment)	Construction	84.0
Source Unknown	Unknown	73.3
Illegal Dumping	Spills/Dumping	60.1
Golf Courses	Recreation And Tourism (Non-Boating)	45.2
Watershed Runoff Following Forest Fire	Silviculture (Forestry)	31.5
Cercla Npl (Superfund) Sites	Legacy/Historical Pollutants	28.3
Aquaculture (Permitted)	Aquaculture	16.6
Forest Roads (Road Construction And Use)	Silviculture (Forestry)	16.1

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Site-specific Targeted Monitoring Results

Arizona Lakes, Reservoirs, and Ponds 2010

Description of this table All Lakes, Reservoirs, and Ponds 335,590.0 Acres of Lakes, Reservoirs, and Ponds Assessed Status Acres Assessed 96,004.2 Unassessed 239,585.8 Total Acres 335,590.0

Description of this table Assessed Lakes, Reservoirs, and Ponds 96,004.2 Acres of Assessed Lakes, Reservoirs, and Ponds Attainment Status Acres Good 23,608.9 Threatened .0 Impaired 72,395.3 Total Acres Assessed 96,004.2

Description of this table Threatened and Impaired Lakes, Reservoirs, and Ponds 72,395.3 Acres of Threatened and Impaired Lakes, Reservoirs, and Ponds TMDL Development Status Acres All TMDLs completed 2,281.7 TMDL alternative .0 Non-pollutant impairment 220.1 TMDL needed 69,893.4 Total Threatened and Impaired 72,395.3

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Arizona Lakes, Reservoirs, and Ponds 2010

* 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
Agricultural Irrigation	12,925.9	96.3	.0	3.7
Agricultural Livestock Watering	36,249.6	94.4	.0	5.6
Aquatic And Wildlife (Coldwater Fishery)	27,751.5	.0	.0	100.0
Aquatic And Wildlife (Effluent Dependent Water)	48.1	.0	.0	100.0
Aquatic And Wildlife (Warmwater Fishery)	24,230.2	81.6	.0	18.4
Domestic Water Source	8,447.8	100.0	.0	.0
Fish Consumption	48,315.0	13.6	.0	86.4
Full Body Contact	2,721.3	25.9	.0	74.1
Partial Body Contact	29.0	.0	.0	100.0

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Site-specific Targeted Monitoring Results

Causes of Impairment
Arizona Lakes, Reservoirs, and Ponds 2010

Cause of Impairment	Cause of Impairment Group	Acres Threatened or Impaired
Mercury in Fish Tissue	Mercury	41,462.3
Selenium	Metals (other than Mercury)	27,044.5
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	3,457.1
pH	pH/Acidity/Caustic Conditions	2,251.9
Ammonia, Un-ionized	Ammonia	1,660.6
Nitrogen, Total	Nutrients	396.9
Chlordane	Pesticides	286.0
Toxaphene	Pesticides	286.0
DDT	Pesticides	286.0
Phosphorus, Total	Nutrients	125.3
Phosphorus, Elemental	Nutrients	119.7
Aquatic Plants - Native	Nuisance Native Species	14.5
Escherichia Coli (E. Coli)	Pathogens	12.5

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Site-specific Targeted Monitoring Results

Probable Sources
Arizona Lakes, Reservoirs, and Ponds 2010

Probable Source	Probable Source Group	Acres Threatened or Impaired
Impacts From Abandoned Mine Lands (Inactive)	Resource Extraction	67,435.5
Sources Outside State Juristiction Or Borders	Other	41,462.3
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	32,300.5
Natural Sources	Natural/Wildlife	32,171.9
Irrigated Crop Production	Agriculture	30,601.6
Rangeland Grazing	Agriculture	30,501.6
Mine Tailings	Resource Extraction	29,347.0
Subsurface (Hardrock) Minining	Resource Extraction	29,296.4
Mill Tailings	Industrial	29,296.4
Internal Nutrient Recycling	Natural/Wildlife	5,202.5
Municipal Point Source Discharges	Municipal Discharges/Sewage	5,202.5
Other Recreational Pollution Sources	Recreation And Tourism (Non-Boating)	5,127.4
Post-Development Erosion And Sedimentation	Hydromodification	5,090.0
On-Site Treatment Systems (Septic Systems And Similar Decencentralized Systems)	Municipal Discharges/Sewage	5,090.0
Residential Districts	Urban-Related Runoff/Stormwater	5,090.0
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	3,484.0
Site Clearance (Land Development Or Redevelopment)	Construction	3,457.1
Woodlot Site Management	Silviculture (Forestry)	3,457.1
Source Unknown	Unknown	1,146.5
Non-Point Source	Unspecified Nonpoint Source	325.2
Contaminated Sediments	Legacy/Historical Pollutants	298.6
Watershed Runoff Following Forest Fire	Silviculture (Forestry)	212.1
Forest Roads (Road Construction And Use)	Silviculture (Forestry)	119.7
Livestock (Grazing Or Feeding Operations)	Agriculture	12.5
Pipeline Breaks	Spills/Dumping	12.5
Wildlife Other Than Waterfowl	Natural/Wildlife	12.5

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Arizona Causes of Impairment for Reporting Year 2010

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Arizona Probable Sources Contributing to Impairments
for Reporting Year 2010

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Arizona TMDL Alternatives by Cause of Impairment 2010

NOTE: Click on the underlined "Number of TMDL Alternatives by Cause of Impairment " value to see a listing of those Causes of Impairment.
Cause of Impairment	Number of TMDL Alternatives	Lakes, Reservoirs, and Ponds (Acres)
Chlordane	1	186
DDT	1	186
Toxaphene	1	186

Total: 3 TMDL Alternatives

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Arizona Previously 303(d)-Listed Waters Now Attaining All Applicable Water Quality Standards

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
2010	4	7
2013	4	4

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Arizona 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)	37
Pesticides	30
Pathogens	21
Mercury	12
Nutrients	8
Sediment	8
Ammonia	8
Organic Enrichment/Oxygen Depletion	6
pH/Acidity/Caustic Conditions	5
Toxic Inorganics	3
Chlorine	2
Nuisance Native Species	1

Total: 141 Causes of Impairment

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Arizona 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
Escherichia Coli (E. Coli)	20	21
Phosphorus, Total	11	14
Copper	8	8
Nitrogen, Total	8	11
pH	8	9
Turbidity	7	7
Nitrogen	6	7
Mercury in Fish Tissue	5	5
Zinc	5	5
Cadmium	4	4
Dissolved Oxygen	3	3
Suspended Sediment	3	3
Mercury	2	2
Ammonia	1	1
Arsenic	1	1
Beryllium	1	1
Boron	1	1
Chlorophyll-A	1	2
Lead	1	1
Phosphorus	1	2
Selenium	1	1
Total Coliform	1	2

Total: 99 TMDLs; 111 Causes of Impairment Addressed

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Arizona 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
2000	27	32
2001	1	1
2002	7	9
2003	15	15
2004	7	7
2005	11	12
2007	2	2
2011	11	11
2012	2	2
2013	4	4
2014	1	1
2016	11	15

Total: 99 TMDLs; 111 Causes of Impairment Addressed

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TMDL Document Search

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