Hunter Water Corporation (HWC) is a State owned corporation located in Newcastle NSW providing water and wastewater services to a population of around 0.5 million in an area of 5,366 square km. HWC operates 21 wastewater treatment plants and around 3,900 km of sewers.

'Pipes Wagga' has traditionally focussed on pipeline rehabilitation. However, this paper details a strategy aimed at mitigating one of the causes of pipe failure Ð corrosion caused by hydrogen sulfide gas generated by septic sewage. Of course the more obvious problem associated with hydrogen sulfide gas is odour. This was the driver for the development of an odour/septicity control strategy by HWC.

Over the years, various odour control measures were utilised in HWC's wastewater transportation system in response to problems as they arose. These measures were implemented in isolation on a site-specific basis. This led to a fragmented approach with various odour control means utilised throughout the wastewater transportation system in an unco-ordinated fashion.

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