{"data":{"id":"us-va/9vac25-260-390","jurisdiction":"us-va","citation":"9VAC25-260-390","heading":"Potomac River Basin (Potomac River Subbasin)","body":"Potomac River Subbasin\n\nSEC.\n\nCLASS\n\nSP. STDS.\n\nSECTION DESCRIPTION\n\n1\n\nII\n\na\n\nTidal tributaries of the Potomac River from Smith Point to Upper Machodoc Creek (Baber Point).\n\n1a\n\nIII\n\nAll free flowing portions of tributaries to the Potomac River from Smith Point to the Route 301 Bridge in King George County unless otherwise designated in this chapter.\n\nVII\n\nSwamp waters in Section 1a\n\nMattox Creek and its tributaries from the head of tidal waters to their headwaters.\n\nMonroe Creek and tributaries from the head of tidal waters at Route 658 to their headwaters.\n\nPine Hill Creek and its tributaries from the confluence with Rosier Creek to their headwaters.\n\nPopes Creek and Canal Swamp (a tributary to the tidal portion of Popes Creek) and their tributaries from the head of tidal waters to their respective headwaters.\n\n1b\n\nIII\n\nb\n\nAll free flowing portions of tributaries to the Potomac River from the Route 301 Bridge in King George County to, and including, Potomac Creek, unless otherwise designated in this chapter.\n\n1c\n\nIII\n\nPWS,b\n\nPotomac Creek and its tributaries from the Stafford County water supply dam (Abel Lake Reservoir) to their headwaters.\n\n2\n\nII\n\na\n\nTidal Upper Machodoc Creek and the tidal portions of its tributaries.\n\n2a\n\nIII\n\nFree flowing portions of Upper Machodoc Creek and its tributaries.\n\n3\n\nII\n\nb\n\nTidal portions of the tributaries to the Potomac River from the Route 301 Bridge in King George County to Marlboro Point.\n\n4\n\nII\n\nb\n\nTidal portions of the tributaries to the Potomac River from Marlboro Point to Brent Point (to include Aquia Creek and its tributaries).\n\n4a\n\nIII\n\nb\n\nFree flowing portions of tributaries to the Potomac River in Section 4 up to the Aquia Sanitary District Water Impoundment.\n\n4b\n\nIII\n\nPWS,b\n\nAquia Creek from the Aquia Sanitary District Water Impoundment, and other tributaries into the impoundment, including Beaverdam Run and the Lunga Reservoir upstream to their headwaters.\n\n5\n\nII\n\nb\n\nTidal portions of tributaries to the Potomac River from Brent Point to Shipping Point, including tidal portions of Chopawamsic Creek and its tidal tributaries.\n\n5a\n\nIII\n\nb\n\nFree flowing portions of Chopawamsic Creek and its tributaries upstream to Quantico Marine Base water supply dam.\n\n5b\n\nIII\n\nPWS,b\n\nChopawamsic Creek and its tributaries above the Quantico Marine Base water supply intakes at the Gray and Breckenridge Reservoirs to their headwaters.\n\n6\n\nII\n\nb\n\nTidal portions of tributaries to the Potomac River from Shipping Point to Chain Bridge.\n\n7\n\nIII\n\nb\n\nFree flowing portions of tributaries to the Potomac River from Shipping Point to Chain Bridge, unless otherwise designated in this chapter.\n\n7a\n\nIII\n\ng\n\nOccoquan River and its tributaries to their headwaters above Fairfax County Water Authority's water supply impoundment, unless otherwise designated in this chapter.\n\n7b\n\nIII\n\nPWS,g\n\nThe impounded waters of Occoquan River above the water supply dam of the Fairfax County Water Authority to backwater of the impoundment on Bull Run and Occoquan River, and the tributaries of Occoquan above the dam to points 5 miles above the dam.\n\n7c\n\nIII\n\nPWS,g\n\nBroad Run and its tributaries above the water supply dam of the City of Manassas upstream to points 5 miles above the dam.\n\n7d\n\n(Deleted)\n\n7e\n\nIII\n\nPWS,g\n\nCedar Run and its tributaries from the Town of Warrenton's raw water intake to points 5 miles upstream (Fauquier County).\n\n7f\n\nIII\n\nPWS,g\n\nThe Quantico Marine Base Camp Upshur and its tributaries' raw water intake on Cedar Run (located approximately 0.2 mile above its confluence with Lucky Run) to points 5 miles upstream.\n\n7g\n\nIII\n\nPWS,g\n\nThe proposed impounded waters of Licking Run above the multiple purpose impoundment structure in Licking Run near Midland (Fauquier County) upstream to points 5 miles above the proposed impoundment.\n\n7h\n\nIII\n\nPWS,g\n\nThe proposed impounded waters of Cedar Run above the proposed multiple purpose impoundment structure on the main stem of Cedar Run near Auburn (Fauquier County), to points 5 miles above the impoundment.\n\n8\n\nIII\n\nPWS\n\nTributaries to the Potomac River in Virginia between Chain Bridge and the Monacacy River from their confluence with the Potomac upstream 5 miles, to include Goose Creek to the City of Fairfax's raw water intake, unless otherwise designated in this chapter.\n\n8a\n\nVI\n\nPWS\n\nBig Spring Creek and its tributaries in Loudoun County, from its confluence with the Potomac River upstream to their headwaters. (The temperature standard for natural trout water may be exceeded in the area above Big Spring and Little Spring at Routes 15 and 740 due to natural conditions). This section was given a PWS designation due to the Town of Leesburg's intake on the Potomac as referenced in Section 8b.\n\niii\n\nBig Spring Creek from its confluence with the Potomac River upstream to Big Spring.\n\n8b\n\nIII\n\nPWS\n\nThose portions of Virginia tributaries into the Potomac River that are within a 5 mile distance upstream of the Town of Leesburg's intake on the Potomac River, unless otherwise designated in this chapter.*\n\n8c\n\nIII\n\nPWS\n\nThose portions of Virginia tributaries into the Potomac River that are within a 5 mile distance upstream of the County of Fairfax's intake on the Potomac River.*\n\n9\n\nIII\n\nBroad Run, Sugarland Run, Difficult Run, Tuscarora Creek, Sycolin Creek, and other streams tributary to streams in Section 8 from a point 5 miles above their confluence with the Potomac River to their headwaters, unless otherwise designated in this chapter.\n\n9a\n\nIII\n\nPWS\n\nAll the impounded water of Goose Creek from the City of Fairfax's water supply dam upstream to backwater, and its tributaries above the dam to points 5 miles above the dam.\n\n9b\n\nIII\n\nPWS\n\nThe Town of Round Hill's (inactive-early 1980s) raw water intake at the Round Hill Reservoir, and including the two spring impoundments located northwest of the town on the eastern slope of the Blue Ridge Mountains.\n\n9c\n\nIII\n\nPWS\n\nUnnamed tributary to Goose Creek, from Camp Highroad's (inactive-late 1980s) raw water intake (Loudoun County) located in an old quarry to its headwaters.\n\n9d\n\nIII\n\nPWS\n\nSleeter Lake (Loudoun County).\n\n10\n\nIII\n\nTributaries of the Potomac River from the Monacacy River to the West Virginia-Virginia state line in Loudoun County, from their confluence with the Potomac River upstream to their headwaters, unless otherwise designated in this chapter.\n\n10a\n\nIII\n\nPWS\n\nNorth Fork Catoctin Creek and its tributaries from Purcellville's raw water intake to their headwaters.\n\n10b\n\nIII\n\nSouth Fork Catoctin Creek and its tributaries from its confluence with the North Fork Catoctin Creek to its headwaters.\n\n11\n\nIV\n\npH-6.5-9.5\n\nTributaries of the Potomac River in Frederick and Clarke Counties, Virginia, unless otherwise designated in this chapter.\n\nV\n\nStockable Trout Waters in Section 11\n\n***\n\npH-6.5-9.5\n\nBack Creek (upper) from Rock Enon 4 miles upstream.\n\n***\n\npH-6.5-9.5\n\nBack Creek (lower) from Route 600 to the mouth of Hogue Creek - 2 miles.\n\n***\n\nhh\n\nHogue Creek from Route 679 upstream 6 miles to the Forks below Route 612.\n\nvi\n\npH-6.5-9.5\n\nOpequon Creek (in Frederick County) from its confluence with Hoge Run upstream to the point at which Route 620 first crosses the stream.\n\nvi\n\npH-6.5-9.6\n\nTurkey Run (Frederick County) from its confluence with Opequon Creek 3.6 miles upstream.\n\nVI\n\nNatural Trout Waters in Section 11\n\nii\n\npH-6.5-9.5\n\nBear Garden Run from its confluence with Sleepy Creek 3.1 miles upstream.\n\niii\n\npH-6.5-9.5\n\nRedbud Run from its confluence with Opequon Creek 4.4 miles upstream.\n\n11a\n\nIV\n\npH-6.5-9.5\n\nHot Run and its tributaries from its confluence with Opequon Creek to its headwaters.\n\nV\n\nStockable Trout Waters in Section 11a\n\nvi\n\npH-6.5-9.5\n\nClearbrook Run from its confluence with Hot Run 2.1 miles upstream.\n\n12\n\nIV\n\nESW-6\n\nSouth Branch Potomac River and its tributaries, such as Strait Creek, and the North Fork River and its tributaries from the Virginia-West Virginia state line to their headwaters.\n\nV\n\nStockable Trout Waters in Section 12\n\nvi\n\nFrank Run from its confluence with the South Branch Potomac River 0.8 mile upstream.\n\nvii\n\npH-6.5-9.5\n\nSouth Branch Potomac River (in Highland County) from 69.2 miles above its confluence with the Potomac River 4.9 miles upstream.\n\nVI\n\nNatural Trout Waters in Section 12\n\nii\n\nBlights Run from its confluence with Laurel Fork (Highland County) upstream including all named and unnamed tributaries.\n\nii\n\nBuck Run (Highland County) from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\nii\n\nCollins Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\nii\n\nLaurel Fork (Highland County) from 1.9 miles above its confluence with the North Fork South Branch Potomac River upstream including all named and unnamed tributaries.\n\niii\n\npH-6.5-9.5\n\nLaurel Run (Highland County) from its confluence with Strait Creek upstream including all named and unnamed tributaries.\n\nii\n\nLocust Spring Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\nii\n\nLost Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\nii\n\nMullenax Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\nii\n\nNewman Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\nii\n\nSlabcamp Run from its confluence with Laurel Fork upstream including all named and unnamed tributaries.\n\niii\n\npH-6.5-9.5\n\nStrait Creek (Highland County) from its confluence with the South Branch Potomac River upstream to the confluence of West Strait Creek.","path":["Title 9. Environment","Agency 25. State Water Control Board","Chapter 260. Water Quality Standards","Part IX. River Basin Section Tables"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter260/section390/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:49:15Z","sha256":"08d78f1518b2304c5c2b4115c5a46072a6d3c08b7399498655d13825dd5a421d","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac25-260-380","next":"us-va/9vac25-260-400"},"notice":"GroundRules: Original legal text. Not legal advice."}