Greywater System Calculator
Calculate greywater production and reuse potential from laundry, showers, and sinks
About this calculator
The Greywater System Calculator helps homeowners determine their daily greywater production from household activities like laundry, showers, and sink usage. This tool estimates the volume of reusable water available for irrigation and other non-potable uses, enabling you to design an appropriately sized greywater collection and treatment system. Understanding your greywater potential is essential for sustainable water management, reducing municipal water consumption, and creating an eco-friendly home water recycling system.
How to use
Enter your household's daily water usage data for laundry loads, shower duration and frequency, and sink usage patterns. Input the number of occupants and typical appliance specifications. The calculator will analyze your inputs to estimate total daily greywater production and provide recommendations for system sizing and reuse applications.
Frequently asked questions
What is greywater and where does it come from?
Greywater is wastewater from showers, bathroom sinks, washing machines, and kitchen sinks (excluding toilets). It's relatively clean and suitable for reuse after basic treatment.
How much greywater does an average household produce daily?
A typical household generates 50-80 gallons of greywater daily, representing about 60-70% of total household wastewater production from various sources.
Can greywater be used for drinking or cooking?
No, greywater should never be used for drinking, cooking, or personal hygiene. It's suitable for irrigation, toilet flushing, and other non-potable applications only.