{"data":{"id":"us-va/9vac25-280-70","jurisdiction":"us-va","citation":"9VAC25-280-70","heading":"Ground water criteria","body":"CONSTITUENT (mg/l)\n\nGROUND WATER CRITERIA BY PHYSIOGRAPHIC PROVINCE***\n\nCoastal Plain\n\nPiedmont \u0026 Blue Ridge\n\nValley \u0026 Ridge\n\nCumberland Plateau\n\nAlkalinity\n\n30-500\n\n10-200\n\n30-500\n\n30‑200\n\nTotal Diss. Solids\n\n1000\n\n250\n\n500\n\n500\n\nChloride\n\n50*\n\n25\n\n25\n\n25\n\nSulfate\n\n50\n\n25\n\n100\n\n150\n\nTotal Organic Carbon\n\n10\n\n10\n\n10\n\n10\n\nColor units\n\n15\n\n15\n\n15\n\n15\n\nIron\n\n0.3\n\n0.3\n\n0.3\n\n0.01-10\n\nManganese\n\n0.05\n\n0.05\n\n0.05\n\n0.01-0.5\n\nSodium\n\n100*\n\n25\n\n25\n\n100\n\nFluoride\n\n1.4**\n\n1.4\n\n1.4\n\n1.4\n\nHardness\n\n120\n\n120\n\n300\n\n180\n\n*It is recognized that naturally occurring concentrations will exceed this limit in the eastern part of the Coastal Plain, especially toward the shoreline and with increased depth.\n\n**Except within the cretaceous aquifer: concentration up to 5 mg/l and higher.\n\n***See Figure 1 for delineation of physiographic provinces.\n\nFigure 1","path":["Title 9. Environment","Agency 25. State Water Control Board","Chapter 280. Ground Water Standards"],"source_url":"https://law.lis.virginia.gov/admincode/title9/agency25/chapter280/section70/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:49:15Z","sha256":"2bcedb915d939730547d678acdd39818327ea3f685187fdda93cfc8084cb2653","source_id":"us-va-vac","stale":false,"prev":"us-va/9vac25-280-60","next":"us-va/9vac25-280-80"},"notice":"GroundRules: Original legal text. Not legal advice."}