Annual Report 2010 - Christchurch City Council

p110. Annual Report
Christchurch Otautahi
2010
Council activities and
services
Water supply
Council activities and services
Water supply
What is the water supply service, and what does the
Council do?
The water supply service is the network of treatment facilities,
wells, pump stations, reservoirs and underground pipes used for
the distribution of clean drinking water in the city.
Why is the Council involved in water supply?
We maintain it in order to protect the health of the community,
to meet the needs of commercial users, to promote water
conservation, and to ensure there is an adequate water supply for
fighting fires.
Local government is responsible for promoting the cultural,
economic, environmental and social well-being of communities for
the present and the future.
Water supply activities contribute to the environmental and
economic well-being of the community by ensuring a reliable
supply of drinking water to both the community and industry.
They also contribute toward the achievement of the city’s
Community Outcomes by helping to make Christchurch a safe city,
a city of people who value and protect the natural environment, a
prosperous city, a healthy city and an attractive and well-designed
city – five of the nine goals for our city that are included in our
Community Outcomes. This contribution is made by maintaining
sufficient drinking water and encouraging water conservation.
For more information on these nine goals see the Community
Outcomes section of this report.
How does it affect me?
When you turn on your tap at home the water that flows is fresh and
clean. We make sure that the water supply is reliable and that water
quality is maintained.
What activities are included in water supply?
Water conservation
We promote the efficient use of water to protect the resource for
future generations. Staff work with the community to reduce
the amount of water we use and to make sure the quality of our
drinking water is maintained.
Water supply
Providing a clean and reliable water supply is one of our key
responsibilities. Council staff monitor and control water quality
and maintain the network of assets used for supply.
What did we achieve?
The well head security programme was completed in 2009/10 for
all existing wells including the well in Wainui. Additionally 268
commercial and industrial premises fitted backflow prevention to
their supply mains in the year. Both these measures are designed to
protect the public water supply from contamination.
The Cashmere Reservoir was bought into service in 2010 and is an
important asset in strengthening the water supply in the centre of
Christchurch.
Water main and sub-main pipe renewals were completed in line
with the asset management plans with major water main and
sub-main renewals being completed in Lyttelton township.
Birdlings Flat water treatment was upgraded to meet the
requirements of the drinking water standards. The design
for the Duvauchelle plant was completed in 2009/10 and will
be constructed in 2010/11. Ensuring we meet requirements of
the drinking water standards contributes towards the health
community outcome.
As part of the water strategy we are progressing a study on the
benefits of rain water tanks in rural townships to support the public
water supply.
The annual leak detection programme was completed in line with
the asset management plan.
Design for the strengthening of the Rapaki water supply for fire
fighting purposes was completed and construction will take place
in the 2010/11 financial year. This has contributed towards the
safety community outcome.