{"data":{"id":"us-va/12vac5-635-300","jurisdiction":"us-va","citation":"12VAC5-635-300","heading":"Continuity of water supply","body":"A. \"Continuity of water supply\" means that a continuous supply of water can be provided to a distribution system supplied by a rainwater harvesting system in the event of insufficient precipitation or other circumstances affecting the supply of harvested rainwater.\n\nB. If a rainwater harvesting system serves as a secondary supply for a distribution system and the primary supply is a waterworks, the rainwater harvesting system shall be an auxiliary water system pursuant to the requirements of the USBC and 12VAC5-590.\n\nC. If a rainwater harvesting system serves as a primary supply for a distribution system for a Tier 2, 3, or 4 end use, the owner shall provide a secondary water supply by a waterworks, a Class III private well, or commercially hauled water meeting pure water standards.\n\nD. The owner shall supply a secondary water supply from a waterworks or private well by a means to refill the water storage unit or a bypass that provides water directly to the distribution system.\n\nE. The owner may only use commercially hauled water to refill a water storage unit prior to filtration and treatment.\n\nF. When water from a secondary water supply is added to a water storage unit, the owner shall ensure that the water is introduced through a reverse pressure principle backflow device or an air gap pursuant to the USBC.","path":["Title 12. Health","Agency 5. Department of Health","Chapter 635. Rainwater Harvesting System Regulations","Part VI. Performance Requirements"],"source_url":"https://law.lis.virginia.gov/admincode/title12/agency5/chapter635/section300/","current_through":"2026 Regular Session (effective July 1, 2026)","vintage":"","retrieved_at":"2026-09-14T04:50:48Z","sha256":"242e4b738f7034b29706fd55e04fefb0835e32f7e28c7dacf9c013cb0033e1b4","source_id":"us-va-vac","stale":false,"prev":"us-va/12vac5-635-290","next":"us-va/12vac5-635-310"},"notice":"GroundRules: Original legal text. Not legal advice."}