Water Usage

Outdoor Water Consumption

WSSC’s rates are based on a customers' average daily consumption (ADC). As your consumption increases, like during dry conditions, your rates will also increase.

Hose Size LBS. Pressure Per Sq Inch Time Gallons Used
1/2 Inch 60 1 Hour 630
5/8 Inch 60 1 Hour 1,020
3/4 Inch 60 1 Hour 1,860
Product Duration Frequency Gallons Per Month
Irrigation System 15 min (with 8 zones) 2 times/week 15,360
Sprinkler 1 hour 3 times/week 12,240

Irrigation Systems

On average a pop-up station (irrigation system) uses approximately 16 gallons per minute (GPM). Here is an example of how to calculate how much water is being used per month:

Number of Minutes x Number of Stations/Zones = Total Minutes
Total Minutes x Gallons per minute = Total Gallons used per watering cycle
Total Gallons per cycle x Number of days per month you water = Total gallons used per month

If your system has 8 stations, you water twice a week, and each station runs for 15 minutes, then you are using 1,920 gallons per day you water, or 15,360 gallons per month.


Running a typical sprinkler from a standard garden hose (5/8”) for one hour uses about 1,020 gallons of water; if you run it three times per week, that is about 12,240 gallons per month. If you run the sprinkler three times a week during a 90-day billing cycle, you will add about 36,000 gallons of water to your usage.

Indoor Water Consumption

Activity Gallons Used
Toilet Flushing 2.6 gallons per flush*
Shower (water running) 28.1 gallons per day
Bath (full tub)  3.6 gallons per day 
Laundry Machine  31 gallons per load
Dishwasher 6.1 gallons per load
Faucet 26.3 gallons per day
Brushing Teeth 10 gallons (tap running) per use
Washing Hands 2 gallons (tap running) per use


28.1 gallons per day

* The rate of consumption for water-saving devices or products significantly varies. Please check the plumbing fixture package to determine the merchandise's efficiency.


Water Research Foundation. (2016, April). Residential End Uses of Water, Version 2. Retrieved from Water Research Foundation: http://www.waterrf.org/PublicReportLibrary/4309A.pdf​

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