Water Usage

Outdoor Water Consumption

During dry conditions customer usage generally increases. WSSC’s rates are based on a customers' average daily consumption (ADC), meaning that as your usage increases so, too, do your water and sewer charges.

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).
    • 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

 

Example:  Your system has 8 stations, you water twice a week and each station runs for 15 minutes. That’s 1,920 gallons per day or 15,360 gallons per month.

 

Sprinklers

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 (Conventional) Gallons Used (Water Saving*)
Toilet Flushing 5 - 7 gallons per flush 1½ - 3½ gallons per flush
Shower (water running) 7 - 10 gallons per minute 2 - 4 gallons per minute
Bath (full tub)

 
 36 - 50 gallons (conventional)

 
30 - 40 gallons (conventional)
40 - 80 gallons (whirlpool)
Laundry Machine (full load) 60 gallons top loader 42 gallons top loader
Dishwasher 15 gallons normal load 7½ - 10 gallons normal load 
Dish Washing by hand 30 gallons tap running 10 - 20 gallons tap running
Shaving 20 gallons tap running 2 - 5 gallons tap running
Brushing Teeth 10 gallons tap running 2 - 3 gallons tap running
Washing Hands 2 gallons tap running 1 - 2 gallons tap running

Bath
Shower

30-50 gallons
7-10 minutes
Average shower = 12 -15 minutes
A 15 minute shower = 150 gallons
Many people shower more than 15 minutes
During hot weather, we tend to shower more often

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

** AVERAGE CONSUMPTION PER DAY PER PERSON = 70 GALLONS

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