Annual Report 2010 - Christchurch City Council

Water supply
Council activities and
services
Annual Report
Christchurch Otautahi
2010
p113.
Council activities and services
Water supply
Trends
The amount of water abstracted each year for the public water supply
is quantified and monitored, with a view to reducing consumption
52.947
53.022 54.802 54.075
75
Total cap = 75M cubic metres
70
60
50
Target: ≤ 71% (+/-10%) of
total cap of 75M m3 potable
water abstracted per year
(53.250M cubic metres)
40
2006/07 2007/08 2008/09 2009/10
Million cubic metres of
potable water abstracted
per year
Risk to potable water supply is managed. Maintain ‘Ba’ grading for all
city supplies, excluding the Northwest Supply Zone (Da)
Ba
Ba Ba Ba
Target: Ba grading for City, excl NW
Highest grade achieved without
treatment (City ex-NW zone)
Da Da Da Da
Highest grade achieved without
treatment (NW zone only)
Target: Da grading for NW zone
2006/07 2007/08 2008/09 2009/10