How to Quantify Demand for Alternative Sources
Wineries should quantify the amount of water demand that could potentially be offset by alternative water supplies. Wineries can optimize the use of alternative water souces by matching the quality of alternative water supplies to the quality requirements of specific applications.
By identifying these opportunities, wineries can reduce their water costs and supply risks by only using potable water where high-quality water is needed.
Activities that do not require potable water:
- Landscape watering
- Subsurface irrigation
- Vine spraying
- Rinsing harvest bins
- Vehicle washing
- First rinse of tanks, destemmer, crusher, and press
- Toilets and urinals
It is estimated that even a small winery that produces less than 5,000 cases per year can use over 250,000 litres of water in non-potable applications. For a winery that trucks in water, this can result in approximately $2,000 in cost savings per year.
Wineries may be able to treat collected rainwater to potable standards through filtration (down to 5 microns) and disinfection (UV, ozone, or chlorine) for use in potable applications. This may also eliminate requirements to install a separate non-potable plumbing system.
Wineries should measure the amount of water they use in different activities to determine how much of their overall water consumption requires potable water and how much can be supplied from other sources. The amount of water used in toilets and urinals can be estimated by multiplying the number of coccupants by the number of flushes per day and the litres per flush.