A natural wetland discharging to a lagoon has been receiving effluent from a treatment works for 20 years. Nutrient levels in the lagoon and through the wetland were studied as part of an overall investigation into increasing the load on the sewage treatment works. The wetland is removing 94% of phosphorus (P) and 77% of nitrogen (N) from the effluent. Potential exists to augment the treatment works and retain/improve the wetlands ability to polish effluent and continue discharge to the lagoon.