4/11/21: Laguna Quays (Queensland) Manganese

Routine drinking water monitoring taken on at the Laguna Quays sample point within the Midge Point Water Supply Scheme (WSS) reticulation network returned a manganese result that breached the ADWG health guideline. Other samples collected on the day of the incident from within the Midge Point WSS and Reservoir were within the ADWG health guidelines, indicating the incident was localised to the Laguna Quays section. In response to the incident, the balance tank at the Midge Point facility was drained and flushed out to removed a build up of sediment which was identified at the bottom of the tank. This sediment is believed to be a potential source of manganese in the reticulation network.

Manganese: ADWG Guidelines 0.5mg/L. ADWG Aesthetic Guideline 0.1mg/L
Manganese is found in the natural environment. Manganese in drinking water above 0.1mg/L can give water an unpleasant taste and stain plumbing fixtures and laundry.