2.4 Wastewater


Maintaining public health and safety and having clean waterways is essential to the city’s environmental wellbeing.

What we do

Sewage collection and disposal is essential for public health and safety, and a core component of the city’s services. Without this service, Wellington could not operate as a modern, environmentally friendly city.

Key projectsTop

The city’s wastewater infrastructure is in good condition, and overflows of untreated wastewater into the environment are rare. However, our current resource consent for this activity (secured for the continuous operation of our wastewater treatment plants over the next 20-25 years) requires that we further reduce the amount and frequency of untreated wastewater overflows. We are progressing with a pilot programme to investigate and evaluate how private drains contribute to these overflows, construct a hydraulic model to more accurately identify sources of excess flows, repair private drains that contribute to the problem (until a policy is developed), and complete the development of overflow containment standards.

Measuring our performanceTop

Our targets for 2013/14 are:

What it will costTop

2.4 Wastewater Operating expenditure 2013–14 Capital expenditure
Income Expenditure Net expenditure Total
($000) ($000) ($000) ($000)
2.4.1 - Sewage collection and disposal network (571) 18,167 17,596 7,411
2.4.2 - Sewage treatment (639) 22,309 21,670 -
2013/14 2.4 Total (1,210) 40,476 39,266 7,411
2012/13 2.4 Total (1,252) 38,720 37,468 7,930