Arizona Water Quality Assessment Report

Assessed Waters of Arizona by Watershed

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Features

Site-specific Targeted Monitoring Summary Results

Arizona (2008)

	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
	Size of Water
Good Waters	1,747.7	79,648.0
Previously impaired waters now attaining all uses	61.1	80.0
Threatened Waters
TMDL completed
TMDL alternative
Non-pollutant impairment
TMDL needed
Impaired Waters	1,016.6	35,327.6
TMDL completed	241.2	630.0
TMDL alternative
Non-pollutant impairment
TMDL needed	775.4	34,697.6
New TMDLs completed	50.4	2,093.0
Remaining TMDLs needed	725.0	32,604.6

Total Assessed Waters	2,764.4	114,975.6
Total Waters	90,375.0	335,590.0
Percent of Waters Assessed	3.1	34.3

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Summary of Water Quality Assessments for Each Waterbody Type
for Reporting Year 2008

Site-specific Targeted Monitoring Results

Arizona Rivers and Streams 2008

Description of this table

Assessed Status	Miles

Assessed	2,764.4
Unassessed	87,610.6
Total Miles	90,375.0

Description of this table

Attainment Status	Miles

Good	1,747.7
Threatened	.0
Impaired	1,016.6
Total Miles Assessed	2,764.4

Description of this table

TMDL Development Status	Miles

All TMDLs completed	291.6
TMDL alternative	.0
Non-pollutant impairment	.0
TMDL needed	725.0
Total Threatened and Impaired	1,016.6

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Arizona Rivers and Streams 2008

* 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
					% Impaired
Agricultural Irrigation	1,475.2	95.1	.0	4.9
Agricultural Livestock Watering	2,272.3	94.2	.0	5.8
Aquatic And Wildlife (Coldwater Fishery)	731.6	73.2	.0	26.8
Aquatic And Wildlife (Effluent Dependent Water)	22.4	33.0	.0	67.0
Aquatic And Wildlife (Ephemeral)	39.8	.0	.0	100.0
Aquatic And Wildlife (Warmwater Fishery)	1,448.6	66.3	.0	33.7
Domestic Water Source	413.9	93.8	.0	6.2
Fish Consumption	2,398.2	95.8	.0	4.2
Full Body Contact	1,931.5	82.4	.0	17.6
Partial Body Contact	78.0	55.0	.0	45.0

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Site-specific Targeted Monitoring Results

Causes of Impairment
Arizona Rivers and Streams 2008

Description of this table

Cause of Impairment	Cause of Impairment Group	Miles Threatened or Impaired
Selenium	Metals (other than Mercury)	288.3
Escherichia Coli (E. Coli)	Pathogens	231.7
Copper	Metals (other than Mercury)	195.6
Solids (Suspended/Bedload)	Sediment	164.0
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	105.9
Turbidity	Turbidity	99.2
DDT	Pesticides	98.9
Chlordane	Pesticides	98.9
Toxaphene	Pesticides	98.9
pH	pH/Acidity/Caustic Conditions	93.0
Zinc	Metals (other than Mercury)	63.0
Boron	Toxic Inorganics	59.4
Cadmium	Metals (other than Mercury)	51.6
Ammonia, Un-ionized	Ammonia	42.1
Mercury	Mercury	39.8
Arsenic	Metals (other than Mercury)	28.8
Lead	Metals (other than Mercury)	21.0
Silver	Metals (other than Mercury)	17.4
Nitrogen, Total	Nutrients	16.6
Phosphorus, Total	Nutrients	16.1
Nitrates	Nutrients	15.5
Sedimentation/Siltation	Sediment	11.9
Chlorine	Chlorine	6.2
Manganese	Metals (other than Mercury)	1.4

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Site-specific Targeted Monitoring Results

Probable Sources
Arizona Rivers and Streams 2008

Description of this table

Probable Source	Probable Source Group	Miles Threatened or Impaired
Natural Sources	Natural/Wildlife	822.7
Rangeland Grazing	Agriculture	410.4
Source Unknown	Unknown	373.5
Sources Outside State Jurisdiction Or Borders	Other	227.7
Mine Tailings	Resource Extraction	186.5
Impacts From Abandoned Mine Lands (Inactive)	Resource Extraction	170.4
Irrigated Crop Production	Agriculture	149.3
Other Recreational Pollution Sources	Recreation And Tourism (Non-Boating)	137.4
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	126.2
Wildlife Other Than Waterfowl	Natural/Wildlife	91.3
Contaminated Sediments	Legacy/Historical Pollutants	69.1
Natural Conditions - Water Quality Standards Use Attainability Analyses Needed	Natural/Wildlife	47.0
Loss Of Riparian Habitat	Habitat Alterations (Not Directly Related To Hydromodification)	39.1
Golf Courses	Recreation And Tourism (Non-Boating)	39.1
Post-Development Erosion And Sedimentation	Hydromodification	38.2
Woodlot Site Management	Silviculture (Forestry)	36.7
Internal Nutrient Recycling	Natural/Wildlife	35.9
Mill Tailings	Industrial	33.2
Atmospheric Deposition - Toxics	Atmospheric Deposition	25.4
Subsurface (Hardrock) Mining	Resource Extraction	25.2
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Discharges/Sewage	18.1
Cercla Npl (Superfund) Sites	Legacy/Historical Pollutants	15.5
Illegal Dumping	Spills/Dumping	15.5
Aquaculture (Permitted)	Aquaculture	8.1
Livestock (Grazing Or Feeding Operations)	Agriculture	7.3
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	6.2
Pipeline Breaks	Spills/Dumping	6.2

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Site-specific Targeted Monitoring Results

Arizona Lakes, Reservoirs, and Ponds 2008

Description of this table

Assessed Status	Acres

Assessed	114,975.6
Unassessed	220,614.4
Total Acres	335,590.0

Description of this table

Attainment Status	Acres

Good	79,648.0
Threatened	.0
Impaired	35,327.6
Total Acres Assessed	114,975.6

Description of this table

TMDL Development Status	Acres

All TMDLs completed	2,723.0
TMDL alternative	.0
Non-pollutant impairment	.0
TMDL needed	32,604.6
Total Threatened and Impaired	35,327.6

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Site-specific Targeted Monitoring Results

Individual Designated Use Support
Arizona Lakes, Reservoirs, and Ponds 2008

* 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
Agricultural Irrigation	109,555.0	99.8	.0	.2
Agricultural Livestock Watering	112,114.0	98.4	.0	1.6
Aquatic And Wildlife (Coldwater Fishery)	3,241.0	2.7	.0	97.3
Aquatic And Wildlife (Warmwater Fishery)	4,780.0	62.2	.0	37.8
Domestic Water Source	86,558.0	100.0	.0	.0
Fish Consumption	94,316.6	66.1	.0	33.9
Full Body Contact	43,106.0	95.7	.0	4.3
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 2008

Description of this table

Cause of Impairment	Cause of Impairment Group	Acres Threatened or Impaired
Mercury in Fish Tissue	Mercury	26,344.0
Mercury	Mercury	5,340.6
Dissolved Oxygen	Organic Enrichment/Oxygen Depletion	4,868.0
pH	pH/Acidity/Caustic Conditions	2,093.0
Ammonia, Un-ionized	Ammonia	1,456.0
Nitrogen, Total	Nutrients	395.0
Chlordane	Pesticides	285.0
DDT	Pesticides	285.0
Toxaphene	Pesticides	285.0
Phosphorus, Elemental	Nutrients	230.0
Phosphorus, Total	Nutrients	15.0
Aquatic Plants - Native	Nuisance Native Species	15.0
Escherichia Coli (E. Coli)	Pathogens	12.0

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Site-specific Targeted Monitoring Results

Probable Sources
Arizona Lakes, Reservoirs, and Ponds 2008

Description of this table

Probable Source	Probable Source Group	Acres Threatened or Impaired
Inappropriate Waste Disposal	Spills/Dumping	18,344.0
Dry Weather Flows With Nps Pollutants	Urban-Related Runoff/Stormwater	18,344.0
Natural Sources	Natural/Wildlife	6,458.0
Source Unknown	Unknown	5,835.0
Internal Nutrient Recycling	Natural/Wildlife	4,745.0
Atmospheric Deposition - Toxics	Atmospheric Deposition	3,926.6
Impacts From Abandoned Mine Lands (Inactive)	Resource Extraction	3,600.6
Mine Tailings	Resource Extraction	1,464.0
Subsurface (Hardrock) Mining	Resource Extraction	1,414.0
On-Site Treatment Systems (Septic Systems And Similar Decentralized Systems)	Municipal Discharges/Sewage	505.0
Other Recreational Pollution Sources	Recreation And Tourism (Non-Boating)	439.0
Post-Development Erosion And Sedimentation	Hydromodification	415.0
Impacts From Hydrostructure Flow Regulation/Modification	Hydromodification	400.0
Residential Districts	Urban-Related Runoff/Stormwater	295.0
Irrigated Crop Production	Agriculture	285.0
Rangeland Grazing	Agriculture	230.0
Municipal (Urbanized High Density Area)	Urban-Related Runoff/Stormwater	187.0
Site Clearance (Land Development Or Redevelopment)	Construction	185.0
Contaminated Sediments	Legacy/Historical Pollutants	185.0
Woodlot Site Management	Silviculture (Forestry)	120.0
Forest Roads (Road Construction And Use)	Silviculture (Forestry)	120.0
Municipal Point Source Discharges	Municipal Discharges/Sewage	15.0

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Arizona Causes of Impairment for Reporting Year 2008

Description of this table

Cause of Impairment Group	Size of Assessed Waters with Listed Causes of Impairment
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	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Ammonia	42.1	1,456.0
Chlorine	6.2
Mercury	39.8	31,684.6
Metals (other than Mercury)	467.6
Nuisance Native Species		15.0
Nutrients	40.1	395.0
Organic Enrichment/Oxygen Depletion	105.9	4,868.0
Pathogens	231.7	12.0
Pesticides	98.9	285.0
pH/Acidity/Caustic Conditions	93.0	2,093.0
Sediment	175.9
Toxic Inorganics	59.4
Turbidity	99.2

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Arizona Probable Sources Contributing to Impairments
for Reporting Year 2008

Description of this table

Probable Source Group	Size of Assessed Waters with Probable Sources of Impairments
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	Rivers and Streams (Miles)	Lakes, Reservoirs, and Ponds (Acres)
Agriculture	537.6	515.0
Aquaculture	8.1
Atmospheric Deposition	25.4	3,926.6
Construction		185.0
Habitat Alterations (Not Directly Related To Hydromodification)	39.1
Hydromodification	164.4	510.0
Industrial	33.2
Legacy/Historical Pollutants	84.6	185.0
Municipal Discharges/Sewage	18.1	520.0
Natural/Wildlife	839.0	6,670.0
Other	227.7
Recreation And Tourism (Non-Boating)	176.5	439.0
Resource Extraction	223.7	3,600.6
Silviculture (Forestry)	36.7	120.0
Spills/Dumping	21.7	18,344.0
Unknown	373.5	5,835.0
Urban-Related Runoff/Stormwater	6.2	18,641.0

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Arizona TMDL Alternatives by Cause of Impairment 2008

Description of this table

Cause of Impairment	Number of TMDL Alternatives	Rivers and Streams (Miles)
NOTE: Click on the underlined "Number of TMDL Alternatives by Cause of Impairment " value to see a listing of those Causes of Impairment.
Manganese	1	1

Total: 1 TMDL Alternatives

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

Description of this table

Year Attaining	Number of Waters Attaining	Number of Causes of Impairment Addressed
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.
2010	4	5

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Arizona Causes of Impairment for 303(d) Listed Waters

Description of this table

Cause of Impairment Group Name	Number of Causes of Impairment Reported
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.
Pesticides	36
Metals (other than Mercury)	28
Pathogens	17
Mercury	14
Organic Enrichment/Oxygen Depletion	12
pH/Acidity/Caustic Conditions	8
Turbidity	7
Ammonia	4
Nutrients	4
Toxic Inorganics	3
Sediment	2
Chlorine	1

Total: 136 Causes of Impairment

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Arizona Cumulative TMDLs by Pollutant

This chart includes TMDLs since October 1, 1995.

Description of this table

Pollutant	Number of TMDLs	Number of Causes of Impairment Addressed
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.
Escherichia Coli (E. Coli)	13	13
Nitrogen	11	12
Copper	10	10
Phosphorus	7	8
Turbidity	7	7
Zinc	7	7
Cadmium	6	6
pH	6	6
Mercury in Fish Tissue	5	5
Dissolved Oxygen	3	3
Mercury	2	2
Suspended Sediment	2	2
Ammonia	1	1
Arsenic	1	1
Beryllium	1	2
Chlorophyll-A	1	1
Lead	1	1
Total Coliform	1	3
pH, High	1	1

Total: 86 TMDLs; 91 Causes of Impairment Addressed

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Arizona Cumulative Number of TMDLs

EPA Fiscal Year starts October 1 and ends September 30.

Description of this table

Fiscal Year	Number of TMDLs	Number of Causes of Impairment Addressed
NOTE: Click on the underlined "Number of TMDLs Completed" value for a detailed list of the TMDLs for the fiscal year.
2000	26	30
2001	1	1
2002	5	5
2003	20	21
2004	7	7
2005	10	10
2007	2	2
2011	11	11
2012	2	2
2013	2	2

Total: 86 TMDLs; 91 Causes of Impairment Addressed

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TMDL Document Search

Full Text Search of TMDL Documents

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