§ ¨ ¦ 66 § ¨ ¦ 495 § ¨ ¦ 395 § ¨ ¦ 95 Winchester Frederick Warren Rappahannock Madison Albemarle Fluvanna Clarke Culpeper Orange Louisa Goochland Loudoun Fauquier Spotsylvania Hanover Arlington Falls Church Manassas Park Manassas Prince William Stafford Fairfax Fredericksburg Caroline Alexandria King George King and Queen King William Essex Westmoreland Richmond Northumberland PL07 PL22 PL02 PL30 PL13 PL11 PL45 PL68 PL71 PL46 PL40 PL64 PL26 PL12 PL39 PL52 PL42 PL34 PL31 PL01 PL56 PL36 PL29 PL32 PL67 PL03 PL60 PL70 PL47 PL73 PL53 PL57 PL05 PL72 PL59 PL10 PL06 PL35 PL41 PL08 PL66 PL19 PL44 PL43 PL17 PL14 PL33 PL37 PL18 PL24 PL48 PL49 PL16 PL27 PL69 PL38 PL23 PL61 PL21 PL58 PL65 PL25 PL09 PL55 PL51 PL50 PL15 PL28 PL54 PL62 PL04 PL63 PL20 PL74 Potomac River Basin Monitoring Stations j W Ambient (200) Ambient/Biological (46) # * Biological (22) k Citizen Monitoring (36) k Other Non-Agency Monitoring (18) X Federal (29) Fish Tissue (1) ^ Trend (46) ! A VDH-BEACH (1) VPDES Dischargers A @ A @ Industrial Municipal Interstate Watersheds Impaired Rivers and Streams Impaired Reservoirs or Estuaries « Miles 0 10 20 30 5 Sources: Virginia Department of Environmental Quality Virginia Department of Conservation and Recreation Virginia Department of Transportation Virginia Geographic Information Network United States Geological Survey final; clb 110117