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Virginia Administrative Code
Title 12. Health
Agency 5. Department of Health
Chapter 635. Rainwater Harvesting System Regulations
12/31/2024

12VAC5-635-300. Continuity of water supply.

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.

B. 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.

C. 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.

D. 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.

E. The owner may only use commercially hauled water to refill a water storage unit prior to filtration and treatment.

F. 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.

Statutory Authority

§§ 32.1-12 and 32.1-248.2 of the Code of Virginia.

Historical Notes

Derived from Virginia Register Volume 41, Issue 5, eff. November 20, 2024.

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