APPENDIX G ARIZONA’S 2016 IMPAIRED WATERS Priority Ranking for TMDL Development

This list contains assessment units that were assessed as impaired (Category 5) by ADEQ or EPA during the current and previous assessment listing cycles (2016 listings are in bold).

CAUSE(S) OF IMPAIRMENT ASSESSMENT UNIT PRIORITY (YEAR FIRST LISTED) Bill Williams Watershed

Alamo Lake Ammonia (2004), mercury in fish tis- Medium 15030204-0040 sue (2002- EPA), high pH (1996) Bill Williams River Alamo Lake to Castaneda Wash Ammonia (2006) Medium 15030204-003 Boulder Creek Tributary at 344114/1131800 to Wilder Creek Beryllium (dissolved)(2010) Low 15030202-006B Coors Lake Mercury in fish tissue (2004- EPA) Low 15030202-5000 Colorado-Grand Canyon Watershed

Colorado River Lake Powell to Paria River Selenium (total) (2016) Low 14070006-001 Colorado River Selenium (total) and suspended sedi- Parashant Canyon to Diamond Creek Low ment concentration (2004) 15010002-003 Kanab Creek Jump-up Canyon to Colorado River 15010003- Selenium (total) (2016) Low 001 Lake Powell Mercury in fish tissue (2010- EPA) Low 14070006-1130 Paria River Suspended sediment concentration Utah border to Colorado River (2004), E. coli (2006), selenium Medium 14070007-123 (total) (2016) Virgin River Sullivan’s Canyon to Beaver Dam Wash Selenium (total) (2012) Medium 15010010-004 Virgin River Selenium (total) and suspended Beaver Dam Wash to Big Bend Wash sediment concentration (2004), E. coli Medium 15010010-003 (2010) Colorado-Lower Gila Watershed

Colorado River Hoover Dam to Lake Mohave Selenium (total) (2004) Low 15030101-015

Appendix C - 1 CAUSE(S) OF IMPAIRMENT ASSESSMENT UNIT PRIORITY (YEAR FIRST LISTED) Colorado River Main Canal to Mexico border Selenium (total) (2006) Low 15030107-001 Lake Mohave Selenium (total) (2010) Low 15030101-0960 Painted Rock Borrow Pit Lake Low dissolved oxygen (1992) Low 15070201-1010 Little Colorado Watershed

Black Canyon Lake Ammonia (2010) Low 15020010-0180 Lyman Lake Mercury in fish tissue (2004- EPA) Low 15020001-0850 Pintail Lake Ammonia (2010) Low 15020005-5000 Puerco River Copper (dissolved) (2010), E. coli Dead Wash to Ninemile Wash Medium (2012/14) 15020007-007 Telephone Lake Ammonia (2010) Low 15020005-1500 Middle Gila Watershed

Agua Fria River E. coli (2010), selenium (total) Sycamore Creek to Big Bug Creek Low (2016) 15070102-023 Alvord Lake Ammonia (2004) Low 15060106B-0050 Arnett Creek Headwaters to Queen Creek Copper (dissolved) (2010) High 15050100-1818 Chaparral Park Lake Low dissolved oxygen and E. coli Medium 15060106B-0300 (2004) Cortez Park Lake Low dissolved oxygen and high pH Medium 15060106B-0410 (2004) Gila River Suspended sediment concentration San Pedro River to Mineral Creek Low (2006) 15050100-008 Hassayampa River Buckeye Canal to Gila River E. coli (2016) Low 15070103-001B Lake Pleasant Mercury in fish tissue (2006- EPA) Low 15070102-1100 Mineral Creek Copper (dissolved) (1992), selenium Devil's Canyon to Gila River (total) (2004), low dissolved oxygen Low 15050100-012B (2006) Money Metals Trib Headwaters to Unnamed Tributary (UB1) Copper and zinc (2016) Low 15070102-123

Appendix C- 2 CAUSE(S) OF IMPAIRMENT ASSESSMENT UNIT PRIORITY (YEAR FIRST LISTED) Queen Creek Copper (dissolved) (2002), lead (total) Headwaters to Superior WWTP discharge High (2010), selenium (total) (2012) 15050100-014A Queen Creek Superior WWTP discharge to Potts Canyon Copper (dissolved) (2004) High 15050100-014B Queen Creek Potts Canyon to Whitlow Canyon Copper (dissolved) (2010) High 15050100-014C Unnamed Trib to Eugene Gulch Headwaters to Eugene Gulch Copper (dissolved) (2016) Low 15070102-1994 Unnamed Tributary to Queen Creek (UQ2) Headwaters to Queen Creek Copper (dissolved) (2010) High 15050100-1000 Unnamed Tributary to Queen Creek (UQ3) Headwaters to Queen Creek Copper (dissolved) (2010) High 15050100-1843 Unnamed Tributary to Queen Creek (UQE) Headwaters to Queen Creek Copper (dissolved) (2010) High 15050100-991 Salt Watershed

Apache Lake Low dissolved oxygen(2006) Low 15060106A-0070 Canyon Lake Low dissolved oxygen(2004) Low 15060106A-0250 Christopher Creek Headwaters to Tonto Creek Low dissolved oxygen (2016) Low 15060105-353 *Also on Not Attaining (4A) List Crescent Lake High pH (2002- EPA) Low 15060101-0420 Five Point Tributary Headwaters to Pinto Creek Copper (dissolved) (2006) High 15060103-885 Pinto Creek West Fork Pinto Creek to Roosevelt Lake Selenium (total) (2004) Low 15060103-018C *Also on Not Attaining (4A) List Roosevelt Lake Mercury in fish tissue (2006- EPA) Low 15060103-1240 Salt River Canyon Creek to Cherry Creek Selenium (total) (2012/14) Low 15060103-007 Salt River Pinal Creek to Roosevelt Lake E. coli (2010) Medium 15060103-004 Tonto Creek Tributary @ 341810/1110414 to Haigler Creek Mercury in fish tissue (2010- EPA) Low 15060105-013B

Appendix C - 3 CAUSE(S) OF IMPAIRMENT ASSESSMENT UNIT PRIORITY (YEAR FIRST LISTED) Tonto Creek Haigler Creek to Spring Creek Mercury in fish tissue (2010-EPA) Low 15060105-011 Tonto Creek Spring Creek to Rye Creek Mercury in fish tissue (2010-EPA) Low 15060105-009 Tonto Creek Rye Creek to Gun Creek Mercury in fish tissue (2010-EPA) Low 15060105-008 Tonto Creek Gun Creek to Greenback Creek Mercury in fish tissue (2010-EPA) Low 15060105-006 Tonto Creek (TON) Greenback Creek to Roosevelt Lake 15060105- Mercury in fish tissue (2010-EPA) Low 004 San Pedro Watershed

Aravaipa Creek Aravaipa Cyn Wilderness - San Pedro River E. coli (2016) Medium 15050203-004C Brewery Gulch Copper (dissolved) (2004-EPA and Headwaters to Mule Gulch Low ADEQ 2006/08) 15080301-337 Copper Creek Cadmium, copper, zinc and selenium Headwaters - Prospect Canyon Medium (2016) 15050203-022A Mule Gulch Headwaters to above Lavender Pit Copper (dissolved) (1990) Low 15080301-090A Mule Gulch Above Lavender Pit to Bisbee WWTP discharge Copper (dissolved) (1990) Low 15080301-090B Mule Gulch Bisbee WWTP discharge to Highway 80 bridge Copper (total and dissolved) (1990) Low 15080301-090C San Pedro River E. coli and copper (dissolved) (2010), Mexico border to Charleston High dissolved oxygen (2016) 15050202-008 San Pedro River Babocomari Creek to Dragoon Wash E. coli (2004) High 15050202-003 Santa Cruz Watershed

Nogales Wash Ammonia and copper (dissolved) Mexico border to Potrero Creek (2004), total residual chlorine (1996), High 15050301-011 E. coli (1998) Parker Canyon Lake Mercury in fish tissue (2004- EPA) Low 15050301-1040 Potrero Creek E. coli, low dissolved oxygen and total Interstate 19 to Santa Cruz River High residual chlorine (2010) 15050301-500B

Appendix C- 4 CAUSE(S) OF IMPAIRMENT ASSESSMENT UNIT PRIORITY (YEAR FIRST LISTED) Rose Canyon Lake Low pH (2004- EPA) Low 15050302-1260 Santa Cruz River Canada Del Oro to HUC 15050303 E. coli (2016) High 15050301-001 Santa Cruz River Josephine Canyon to Tubac Bridge Ammonia and E. coli (2010) High 15050301-008A Santa Cruz River Nogales WWTP - Josephine Can E. coli (2012/14) High 15050301-009 Sonoita Creek 1600 feet below Patagonia WWTP discharge to Zinc (total) (2004), low dissolved oxy- Low Patagonia Lake gen (1998) 15050301-013C Upper Gila River

Blue River Strayhorse Creek to San Francisco River E. coli (2006) Medium 15040004-025B Cave Creek Headwaters to South Fork Cave Creek Selenium (total) (2004) Low 15040006-852A Gila River Bonita Creek to Yuma Wash Lead (total) (2010) Low 15040005-022 San Francisco River Blue River to Limestone Gulch E. coli (2006) Medium 15040004-003 San Francisco River Limestone Gulch to Gila River E. coli (2010) Medium 15040004-001 Verde Watershed

Ackers East Headwaters - Ackers West E. coli (2016) High 15060202-3313 Ackers West Headwaters - Granite Creek E. coli (2016) High 15060202-3333 Aspen Creek Headwaters - Granite Creek E. coli (2016) High 15060202-769 Bannon Creek Headwaters - Granite Creek E. coli (2016) High 15060202-774 Butte Creek Headwaters - Miller Creek E. coli (2012/14) High 15060202-768

Appendix C - 5 CAUSE(S) OF IMPAIRMENT ASSESSMENT UNIT PRIORITY (YEAR FIRST LISTED) Government Canyon Headwaters - Granite Creek E. coli (2016) High 15060202-775 Granite Creek Headwaters to Willow Creek E. coli (2010) High 15060202-059A Granite Creek Yavapai Reservation to Watson Lake E. coli (2010) High 15060202-059B Manzanita Creek Headwaters to Granite Creek E. coli (2012/14) High 15060202-772 Miller Creek Headwaters to Granite Creek E. coli (2010) High 15060202-767 North Fork Miller Headwaters to Miller Creek E. coli (2016) High 15060202-013 North Granite Creek Headwaters to Granite Creek E. coli (2016) High 15060202-757 Oak Creek Spring Creek to Verde River E. coli (2016) High 15060202-016 Slaughterhouse Gulch Headwaters to Granite Creek E. coli (2016) High 15060202-777 Verde River Bartlett Dam to Camp Creek Arsenic (total) (2010) Low 15060203-004 Verde River Sycamore Creek to Oak Creek Dissolved oxygen and E. coli (2016) Medium 15060202-025 Watson Lake Nitrogen, low dissolved oxygen, high High 15060202-1590 pH (2004- EPA) Willow Creek Reservoir Ammonia (2012) Low 15060202-1660

Appendix C- 6