In most instances, wholesalers measure trade effluent volume with a meter.
By installing meters on discharge pipes, they’re able to measure the volume of liquid leaving the premises directly. They monitor this as it enters the sewage treatment plant.
If your business doesn’t have a meter on the discharge pipe, you could also be sub-metered on water input. Wholesalers asses the volume entering the commercial property and assume the volume of liquid effluent discharged.
Finally, a calculation discharge method may identify your trade effluent volume. For example, wholesalers or water companies often calculate landfill sites based on the size of the area and the monthly rainfall. You will always agree on this before the tariff begins.