In addition to the definitions contained in A.R.S. § 49-201, the words and phrases of this Article shall have the following meaning:
1. "Drinking water protected use" means the protection and maintenance of aquifer water quality for human consumption.
2. "Hardrock areas containing little or no water" means areas of igneous or metamorphic rock which do not yield usable quantities of water.
3. "Nondrinking water protected use" means the protection and maintenance of aquifer water quality for a use other than human consumption.
4. "Usable quantities" means five gallons of water per day.
Ariz. Admin. Code § R18-11-501