Infiltration Reduction

We will introduce an Infiltration reduction program to reduce stormwater infiltration into our sewerage systems.

During wet weather, infiltration into our systems means that we have to treat much more than usual at our sewage treatment plants. In particularly leaky systems, such as Wingham, Taree and Gloucester (the older systems), the ratio of wet weather to dry weather inflow can be as high as 20:1. The higher inflows mean we need to pump and treat more effluent which means that our costs are higher than they otherwise would be.

Remediation processes will consider available technologies and evaluate their efficiency to ensure an effective infiltration program is implemented.

Target

We will aim to reduce stormwater infiltration by 10% in the Gloucester, Bulahdelah, Taree and Wingham schemes