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Virginia State Report
Other states that contain this watershed:
District Of Columbia, Middle Potomac-Anacostia-Occoquan Watershed
Maryland, Middle Potomac-Anacostia-Occoquan Watershed

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Water Quality Data Available for this Watershed

Virginia, Middle Potomac-Anacostia-Occoquan Watershed


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Features

Listed Waters for Reporting Year 2008
Virginia, Middle Potomac-Anacostia-Occoquan Watershed

Description of this table
NOTE: Click on the underlined "Waterbody Name" to view a Waterbody report.
Waterbody Name Waterbody ID Location Waterbody Type Size Units State TMDL Development Status
Accotink Bay VAN-A15E_ACO01A06 Segment Includes Tidal Waters Of Accotink Creek Until The Confluence With The Tidal Waters Of Pohick Bay/Gunston Cove. Portion Of Cbp Segment Pottf. Estuary .349 square miles TMDL needed
Accotink Creek VAN-A15R_ACO01A00 Segment Begins At The Confluence With Calamo Branch And Continues Downstream Until The Tidal Waters Of Accotink Bay. River 8.62 miles TMDL needed
Accotink Creek VAN-A15R_ACO05A04 Segment Begins At The Headwaters Of Accotink Creek, And Continues Downstream Until The Confluence With Daniels Run. River .85 miles TMDL completed
Accotink Creek VAN-A15R_ACO04A02 Segment Begins At The Confluence With Daniels Run, In The City Of Fairfax, And Continues Downstream Until The Confluence With Long Branch, At Eakin Park. River 1.19 miles TMDL needed
Belmont Bay VAN-A25E_OCC04A02 Segment Extends 0.5 Mile Around The Monitoring Station 1aocc-766-All (Coordinates 38.647, -77.195). Portion Of Cbp Segment Pottf. Estuary .416 square miles TMDL needed
Belmont Bay (Occoquan River) VAN-A25E_OCC03A04 Segment Extends 0.5 Mile Around Coastal 2000 Monitoring Station 1aocc002.62 (Coordinates 38.6382, -77.208). Portion Of Cbp Segment Pottf. Estuary .392 square miles TMDL needed
Broad Run VAN-A19R_BRU01A04 Segment Begins At The Confluence With Kettle Run And Continues Downstream Until The Confluence With Cedar Run, Forming The Occoquan River/Lake Jackson. River 2.23 miles TMDL needed
Broad Run VAN-A19R_BRU07B06 Segment Begins At The Confluence With Trapp Branch And Continues Downstream Until The Confluence With Catletts Branch. River 1.13 miles TMDL needed
Bull Run VAN-A23R_BUL01C04 Segment Begins At The Confluence Of Popes Head Creek With Bull Run And Continues Downstream Until Rivermile 5.8. River .95 miles TMDL needed
Bull Run VAN-A21R_BUL01B06 Segment Begins At The I-66 Crossing And Continues Downstream Until The Confluence With Flat Branch. River 2.54 miles TMDL needed
Bull Run VAN-A21R_BUL02A00 Segment Begins At The Confluence With Chestnut Lick, Approximately 0.7 Rivermile Upstream From Route 705, And Continues Downstream Until The Confluence With An Unnamed Tributary To Bull Run, At Rivermile 22.34. River 4.37 miles TMDL needed
Bull Run VAN-A23R_BUL01A06 Segment Begins At The Route 612 Crossing, At Rivermile 5.8, And Continues Downstream Until The Beginning Of The Occoquan Reservoir, At Rivermile 2.89. River 2.27 miles TMDL needed
Bull Run VAN-A23R_BUL01B02 Segment Begins At The Route 612 Crossing, At Rivermile 5.8, And Continues Downstream Until The Boundary Of The Pws Designation Area, At Rivermile 5.18. River .62 miles TMDL needed
Bull Run VAN-A21R_BUL01A06 Segment Begins At The Confluence With Flat Branch And Continues Downstream Until The Confluence With Cub Run. River .18 miles TMDL needed
Bull Run VAN-A23R_BUL02A02 Segment Begins At The Confluence With Cub Run, At The Start Of Watershed A23r, And Continues Downstream Until The Confluence With Popes Head Creek. River 4.8 miles TMDL needed
Cameron Run/Hunting Creek VAN-A13R_CAM01A04 Segment Begins At The Confluence With Backlick Run And Continues Downstream Until The Route 241 (Telegraph Road) Bridge Crossing. River 2.12 miles TMDL completed
Catharpin Creek VAN-A21R_CAA01A02 Segment Begins At The Headwaters Of Catharpin Creek And Continues Downstream Until The Confluence With Little Bull Run. River 6.26 miles
Cedar Run VAN-A17R_CER04A06 Segment Begins At The Outlet Of The Warrenton Reservoir And Continues Downstream Until The Boundary Of The Pws Designation Area, Approximately 0.1 Rivermile Downstream From The Route 678 Crossing. River 1.81 miles
Cub Run VAN-A22R_CUB01A00 Segment Begins At The Confluence With Elklick Run And Continues Downstream Until The Confluence With Bull Run. River 6.75 miles TMDL needed
Dogue Creek VAN-A14E_DOU01A00 Segment Includes All Tidal Waters Of Dogue Creek, Extending From Approximately Rivermile 2.1 Until The Confluence With The Potomac River. Portion Of Cbp Segment Pottf. Estuary .74 square miles TMDL needed
Elk Run VAN-A18R_ELK01A08 Segment Begins At The Confluence With Furrs Run And Continues Downstream Until The Confluence With Town Run. River 2.17 miles
Elklick Run VAN-A22R_ELC01A04 Segment Begins At The Confluence With An Unnamed Tributary To Elklick Run, Approximately 0.65 Rivermile Downstream From The Route 620 Crossing, And Continues Downstream Until The Confluence With Cub Run. River 2.16 miles TMDL needed
Flatlick Branch VAN-A22R_FLL01A04 Segment Begins At The Confluence With Frog Branch And Continues Downstream Until The Confluence With Cub Run. River 3.02 miles TMDL needed
Fourmile Run VAN-A12E_FOU01A00 Segment Includes The Tidal Waters Of Fourmile Run; From Rivermile 1.46 Downstream Until The Confluence With The Potomac River, At The State Line. Portion Of Cbp Segment Pottf. Estuary .052 square miles TMDL needed
Gunston Cove VAN-A15E_POH01A00 Segment Extends From Rivermile 1.31 In Gunston Cove Until The Confluence With The Potomac River. Portion Of Cbp Segment Pottf. Estuary 1.51 square miles TMDL needed
Holmes Run VAN-A13R_HOR01A00 Segment Begins At The Mouth Of Lake Barcroft And Continues Downstream Until The Confluence With Backlick Run. River 3.59 miles TMDL needed
Holmes Run VAN-A13R_HOR01B00 Segment Begins At The Headwaters Of Holmes Run And Continues Downstream Until The Start Of Lake Barcroft. River 5.8 miles TMDL needed
Hooff Run VAN-A13E_HFF01A06 Segment Contains The Tidal Portion Of Hooff Run; Begins At The Alexandria National Cemetery And Continues Downstream Until The Confluence With Hunting Creek. Portion Of Cbp Segment Pottf. Estuary .005 square miles TMDL needed
Hunting Creek VAN-A13E_HUT01A02 Segment Includes All Tidal Waters Of Hunting Creek; Beginning At The Route 241 (Telegraph Road) Bridge Crossing And Continuing Downstream Until The Mouth Of The Embayment, At Jones Point And Belle View. Portion Of Cbp Segment Pottf. Estuary 1.36 square miles TMDL needed
Indian Run VAN-A13R_INA01A06 Segment Begins At The Headwaters Of Indian Run And Continues Downstream Until The Confluence With Backlick Run. River 2.94 miles TMDL needed
Kettle Run VAN-A19R_KET02A04 Segment Begins At The Confluence With An Unnamed Tributary To Kettle Run, Just Upstream From Route 602, And Continues Downstream Until The Confluence With Another Unnamed Tributary To Kettle Run, At Approximately Rivermile 10.5. River 3.46 miles TMDL needed
Licking Run VAN-A17R_LIL02A04 Segment Begins At The Boundary Of The Pws Designation Area, At Rivermile 11.32, And Continues Downstream Until The Start Of Germantown Lake. River 3.49 miles TMDL needed
Licking Run VAN-A17R_LIL02B06 Segment Begins At The Headwaters Of Licking Run And Continues Downstream Until The Boundary Of The Pws Designation Area, At Rivermile 11.32. River 3.28 miles TMDL needed
Little Hunting Creek VAN-A14E_LIF01A00 Segment Includes All Tidal Waters Of Little Hunting Creek, Extending From Approximately Rivermile 1.7 Downstream Until The Confluence With The Potomac River. Portion Of Cbp Segment Pottf. Estuary .248 square miles TMDL needed
Little Rocky Run VAN-A23R_LIP01A06 Segment Begins At The Confluence With Willow Springs And Continues Downstream Until The Confluence With Bull Run. River 4.78 miles
Long Branch VAN-A15R_LOE01A02 Segment Begins At The Confluence With An Unnamed Tributary To Long Branch, At The Route 651 (Guinea Road) Bridge, And Continues Downstream Until The Confluence With Accotink Creek, At Rivermile 14.32 Just Below Braddock Road. River 2.24 miles TMDL needed
Long Branch VAN-A15R_LOA01A08 Segment Begins At The Headwaters Of Long Branch And Continues Downstream Until The Confluence With Accotink Creek, At Rivermile 4.41. River 4.76 miles
Lucky Run VAN-A18R_LUC01A04 Segment Begins At The Headwaters Of Lucky Run And Continues Downstream Until The Confluence With Cedar Run. River 3.33 miles TMDL needed
Mills Branch VAN-A25R_WLB01A02 Segment Begins At The Headwaters Of Mills Branch And Continues Downstream Until The Confluence With The Occoquan River. Mills Branch, A Channeled Flow Under The Lorton Landfill, Is An Unnamed Tributary On The Occoquan/Ft. Belvoir Quads. River 1.81 miles TMDL needed
Neabsco Bay VAN-A25E_NEA01A00 Segment Includes The Tidal Waters Of Neabsco Bay, Beginning At Rivermile 1.37, Downstream Until The Confluence With Occoquan Bay. Portion Of Cbp Segment Pottf. Estuary .795 square miles TMDL needed
Neabsco Creek VAN-A25R_NEA01A00 Segment Begins At The Confluence With An Unnamed Tributary To Neabsco Creek, Near Dale City And Approximately 0.4 Rivermile Downstream From Route 784 (On The Tributary) And Continues Downstream Until The Start Of The Tidal Waters Of Neabsco Bay. River 8.8 miles TMDL needed
Neabsco Creek VAN-A25E_NEA20A02 Segment Begins At The Upstream Limit Of The Tidal Waters On Neabsco Creek And Continues Downstream Until The Start Of The Open Waters Of Neabsco Bay, Approximately 0.8 Rivermile Upstream From Monitoring Station 1anea000.57. Portion Of Cbp Segment Pottf. Estuary .23 square miles TMDL needed
Occoquan Bay VAN-A25E_OCC01A04 Segment Extends 0.5 Mile Around The Coastal 2000 Monitoring Station 1aocc000.06. The Downstream Limit Is The State Line At The Potomac River. Portion Of Cbp Segment Pottf. Estuary .48 square miles TMDL needed
Occoquan Bay VAN-A25E_OCC02A00 Segment Extends 0.5 Mile Around The Around Monitoring Station 1aocc002.47. Portion Of Cbp Segment Pottf. Estuary .592 square miles TMDL needed
Occoquan Bay/Belmont Bay VAN-A25E_POT20A02 Segment Includes All Tidal Waters In Watershed Not Included In Other Delineated Stream Segments. Portion Of Cbp Segment Pottf. Estuary .244 square miles TMDL needed
Occoquan Bay/Belmont Bay VAN-A25E_OCC20A02 Segment Includes All Waters Of The Occoquan And Belmont Bays Not Included In Other Delineated Segments. Portion Of Cbp Segment Pottf. Estuary 5.393 square miles TMDL needed
Occoquan Reservoir VAN-A24L_OCC01A02 Segment Includes Most Of The Occoquan Reservoir; Extending From Rivermile 19.83 On The Occoquan River And Rivermile 1.57 On Bull Run, At The Crossing Of The Route 612 Bridge, Downstream Until The Dam, Located At Rivermile 7.14 Along The Occoquan River. Reservoir 1265 acres TMDL needed
Occoquan Reservoir VAN-A24L_OCC02A06 Segment Includes The Upper Bull Run Arm Of The Occoquan Reservoir; Extending From Rivermile 2.89 On Bull Run Downstream Until The Crossing Of The Route 612 (Yates Ford Road) Bridge. Reservoir 63 acres TMDL needed
Occoquan River VAN-A25E_OCC05A02 Segment Extends From 0.5 Rivermile Upstream Of Monitoring Station 1aocc006.99 Until 0.5 Rivermile Downstream Of Monitoring Station 1aocc006.64. Portion Of Cbp Segment Pottf. Estuary .052 square miles TMDL needed
Occoquan River/Massey Creek VAN-A25E_OCC04B08 Segment Extends From 0.5 Rivermile Upstream Of Monitoring Station 1aocc004.52 Until 0.5 Rivermile Downstream Of Monitoring Station 1aocc003.82. Portion Of Cbp Segment Pottf. Estuary .6686 square miles
Pimmit Run VAN-A12R_PIM02A00 Segment Begins At The Route 309 Bridge Crossing, At Rivermile 4.16, And Continues Downstream Until The Confluence With Little Pimmit Run, Approximately 0.1 Rivermile Downstream From Route 695. River 2.53 miles TMDL needed
Pimmit Run VAN-A12R_PIM01A00 Segment Begins At The Confluence With Little Pimmit Run, Approximately 0.1 Rivermile Downstream From Route 695, And Continues Downstream Until The Confluence With The Potomac River. River 1.63 miles TMDL needed
Pimmit Run VAN-A12R_PIM02B06 Segment Begins At The Headwaters Of Pimmit Run, Approximately 0.12 Rivermile Upstream From Route 7, And Continues Downstream Until The Route 309 Bridge Crossing, At Rivermile 4.16. River 3.22 miles TMDL needed
Pohick Bay VAN-A15E_POH02A00 Segment Includes Tidal Waters Of Pohick Creek, From The Boundary Of Watershed A15, And Extends Until Rivermile 1.31 In Gunston Cove. Portion Of Cbp Segment Pottf. Estuary .611 square miles TMDL needed
Pohick Bay VAN-A16E_POH01A06 Segment Includes Tidal Waters Of Pohick Creek Upstream From The Boundary Of Watershed A16. Portion Of Cbp Segment Pottf. Estuary .294 square miles TMDL needed
Pohick Creek VAN-A16R_POH01A00 Segment Begins At The Confluence With South Run, Approximately 0.25 Rivermile Upstream From I-95, And Continues Downstream Until The End Of The Free-Flowing Portion Of Pohick Creek. River 3.2 miles TMDL needed
Pohick Creek VAN-A16R_POH03A04 Segment Begins At The Confluence With Sideburn Branch And Continues Downstream Until The Confluence With An Unnamed Tributary To Pohick Creek, At Rivermile 14.18. River 1.52 miles TMDL needed
Potomac River VAN-A14E_POT01A08 Segment Includes All Tidal Waters Downstream Of The Mouth Of The Hunting Creek Embayment, At Jones Point And Belle View. Portion Of Cbp Segment Pottf. Estuary .818 square miles
Purcell Branch VAN-A20R_PUR01A06 Segment Begins At The Headwaters Of Purcell Branch, Near Woodbine School, And Continues Downstream Until The Confluence With The Occoquan Reservoir, At Rivermile 23.23. River 3.16 miles TMDL needed
Sandy Run VAN-A24R_SAD01A04 Segment Begins At The Boundary Of The Pws Designation, At Rivermile 3.1 And Continues Downstream Until The End Of The Free-Flowing Waters At The Inundated Waters Of The Occoquan Reservoir. River 5.37 miles TMDL needed
Town Run VAN-A18R_TON01A08 Segment Begins At The Confluence With Negro Run And Continues Downstream Until The Confluence With Elk Run. River 2.36 miles
Trapp Branch VAN-A19R_TRA01A06 Segment Begins At The Confluence With An Unnamed Tributary To Trapp Branch, Approximately 0.08 Rivermile Downstream From The Route 696 Crossing, And Continues Downstream Until The Confluence With Broad Run. River 1.49 miles TMDL needed
Tripps Run VAN-A13R_TRI01A00 Segment Begins At The Headwaters Of Tripps Run And Continues Downstream Until The Start Of Lake Barcroft. River 2.25 miles TMDL needed
Turkey Run VAN-A17R_TUK01A06 Segment Begins At The Confluence With An Unnamed Tributary To Turkey Run, Approximately 0.25 Rivermile Upstream From The Route 602 Crossing, And Continues Downstream Until The Confluence With Cedar Run, At Rivermile 20.89. River 3.62 miles TMDL needed
Walnut Branch VAN-A17R_WAL01A06 Segment Begins At The Confluence With An Unnamed Tributary, Just Upstream From The Railroad Crossing, And Continues Downstream Until The Confluence With Cedar Run, At Rivermile 15.16. River 1.67 miles
Wolf Run VAN-A24R_WOL01A06 Segment Begins At The Confluence With Maple Branch And Continues Downstream Until The End Of The Free-Flowing Waters At The Inundated Waters Of The Occoquan Reservoir. River 2.17 miles TMDL needed

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Causes of Impairment for Reporting Year 2008

Virginia, Middle Potomac-Anacostia-Occoquan

Description of this table
NOTE: Click on the underlined "Cause of Impairment" value to see a listing of those waters with that cause of impairment.
Cause of Impairment Size of Assessed Waters with Listed Causes of Impairment
Rivers and
Streams (Miles)		 Lakes, Reservoirs,
and Ponds (Acres)		 Bays and
Estuaries
(Square Miles)
Chlordane 1.6    
Benzo[k]fluoranthene     .3
pH     .6
Fecal Coliform 10.7   .1
Dissolved Oxygen   1,327.8  
Estuarine Bioassessments     .3
Benthic Macroinvertebrates Bioassessments 36.8    
Escherichia Coli (E. Coli) 166.7   3.6
Heptachlor Epoxide 1.6    
PCB(s) in Fish Tissue 18.3 62.8 13.7

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Cumulative TMDLs by Pollutant

Virginia, Middle Potomac-Anacostia-Occoquan Watershed

This chart includes TMDLs since October 1, 1995.

Description of this table
NOTE: Click on the underlined "Number of TMDLs Completed" value to see a listing of those approved TMDLs for the pollutant.
Pollutant Number of TMDLs Completed Number of Causes of
Impairment Addressed
Escherichia Coli (E. Coli) color.gif 11 11
Ammonia color.gif 7 7
Polychlorinated Biphenyls (PCBs) color.gif 7 7
Fecal Coliform color.gif 4 4
Pollutants in Urban Stormwater color.gif 3 3
Benzene color.gif 2 2
Sediment color.gif 2 2
Bacterial Slimes color.gif 1 1
Benthic color.gif 1 1
Ethylbenzene color.gif 1 1
Naphthalene color.gif 1 1
PCBs in Sediment color.gif 1 1
Toluene color.gif 1 1
Total Residual Chlorine color.gif 1 1
Xylene color.gif 1 1

Total: 44 TMDLs; 0 Causes of Impairment



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