Would the installation of hose bibs on the exterior of the building prevent us from claiming zero use of potable water for irrigation? Those hose bibs will supply water to clean loading docks, wash the dumpster, and provide water for maintenance and occasional cleaning of the exterior. There is no intention of using the hose bibs for irrigation because all plants are local and do not require irrigation except as a last resort in times of drought.
The installation of exterior hose bibs does not preclude a project from claiming zero potable water use for irrigation. The requirements for WE Credit 1.2 list as an option, "do not install permanent landscape irrigation systems." In general, hose bibs are not considered permanent landscape irrigation systems. Applicable internationally.