Washington Administrative Code (Last Updated: November 23, 2016) |
Title 16. Agriculture, Department of (See Titles 24, 60, and 142) |
Chapter 16-202. Application of pesticides and plant nutrients through irrigation systems. |
Section 16-202-1023. Public water system cross-connections or connections to a potable water supply intended for human use.
Latest version.
- (1) If the irrigation system is cross-connected to a public water system, Washington state department of health (DOH) rules (WAC 246-290-490) apply to backflow prevention.(2) Cross-connections of a chemigation system to any potable water system intended for human use must have either a department of health-approved reduced pressure backflow assembly or reduced pressure detector assembly installed for backflow prevention. Otherwise, a physical separation in the form of an air gap may be used to protect the water source.
Rules
246-290-490,