Cal. Code Regs. tit. 23, § 697
(a) Irrigation Use.
(b) Domestic Use. Allowances for domestic use are variable, depending upon the character of the place of use, method of use, character of use and availability of water. The quantities considered reasonable for the respective domestic uses are as follows:
Homes, Resorts, Motels, Organization Camps, etc.
Fully plumbed
55 to 75 gallons per day per person
Sink and flush toilet only
40 gallons per day per person
Sink and shower only
35 gallons per day per person
Sink only
25 gallons per day per person
Outside supply only
15 gallons per day per person
Cafe, fountain, etc
2.5 gallons per day per person
Camp Grounds
Depending upon facilities provided, allowances range from 5 gallons per day per person, where faucets only are provided, to 30 gallons per day per person where washbowls, showers, flush toilets and laundry trays are provided.
Lawn, Garden, Orchard and Grounds
Irrigation
18.5 gallons per day per 100 square feet
Sprinkling to allay dust.
7.5 to 10 gallons per day per 100 square feet
Livestock
Milch cows
30 gallons per day per head
Horses
15 gallons per day per head
Goats and hogs
2.5 gallons per day per head
Poultry, rabbits, etc
0.25 gallon per day per head
(c) Stockwatering Use. For use for watering commercial livestock, the quantities considered reasonable are as follows:
Range cattle and horses
15 gallons per day per head
Hogs and goats
2.5 gallons per day per head
Sheep
1.5 gallons per day per head
Milch cows
30 gallons per day per head
Hosing out dairy barn
35 gallons per day per head
The amount of water considered reasonably necessary for certain uses when the appropriation will be by direct diversion shall be determined in the following manner:
Note: Authority cited: Section 1058, Water Code. Reference: Section 275, 1240 and 1252, Water Code.
1. Renumbering and amendment of Section 657 to Section 697 filed 1-16-87; effective thirtieth day thereafter (Register 87, No. 10). For prior history, see Registers 64, No. 6 and 55, No. 17.
2. Editorial correction amending subsection (a)(2) (Register 2005, No. 17).