How much better is a treatment plant than a septic tank?

The performance difference is dramatic:

• Old septic tank: typically discharges 1.5–2.5 kg of phosphate annually

• Modern treatment plant: discharges less than 0.1 kg of phosphate annually – a reduction of over 95%

Beyond phosphates, modern treatment plants are simply more effective across the board: better treatment of all pollutants, more reliable operation, better handling of variable loads, and full compliance with current environmental standards.

WCI produces a Technical Mitigation Report (TMR) demonstrating the phosphate reduction for council approval – this proves the environmental benefit is real and measurable.