Annual Report 2011 - Watercare

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Watercare Services Limited 2011 ANNUAL REPORT safe and reliable water 1A. Percentage of drinking water treated in Watercare plants that are graded ‘A’ by the Ministry of Health. 10 20 30 40 50 60 70 80 90 100 2011 92% 7/10 New Performance Measure Target 100% by 2020 The Auckland Regional Public Health Service undertakes an annual risk-based assessment of the drinking water supply system on behalf of the Ministry of Health. The assessment is a measure of confidence that the system will not become contaminated. All the metropolitan water treatment plants that supply the bulk of drinking water to the people in Auckland meet the ‘A’ grade standard. In total, ‘A’ grade plants supply 92% of the drinking water to the Auckland area. Of the smaller nonmetropolitan plants transferred to Watercare on 1 November 2010, nine remain ungraded. Watercare has set in place a programme to ensure all plants meet the ‘A’ grade standard by 2020, at a capital cost of $100 million for both water treatment plants and the distribution network. 1B. Percentage of drinking water reticulated through the Watercare network that is graded ‘a’ by the Ministry of Health. 10 20 30 40 50 60 70 80 90 100 2011 89% 7/10 New Performance Measure Target 100% by 2020 The same risk-based assessment used for water treatment plants also applies to the pipes and pump stations that make up the water distribution networks. The metropolitan network is graded ‘a’ under the Ministry of Health’s standards and supplies the bulk of the drinking water to the people in the Auckland area. These networks, plus the ‘a’ graded non-metropolitan networks, supply 89% of the water to the Auckland area. Of the 16 non-metropolitan networks (inherited on 1 November 2010), 10 are ungraded and three are ‘b’ graded. Watercare has set in place a programme to ensure that all the networks meet the ‘a’ grade standard by 2020. 1C. Percentage performance against Statement of Corporate Intent target: quality of drinking water. 10 20 30 40 50 60 70 80 90 100 2011 100% 7/10 New Performance Measure Target Watercare fully met the Statement of Corporate Intent (SCI) target in respect of the achievement of the Ministry of Health’s Drinking Water Standards for New Zealand (DWSNZ) at Ministry of Health-graded water treatment plants (see ruler 1A, above). The DWSNZ standards are based on a quality assurance approach, underpinned by the requirement to develop public health risk-management plans. Information on DWSNZ is available at www.moh.govt.nz\water. 1D. Percentage performance against Statement of Corporate Intent target: service interruption to customer connection ratio. 10 20 30 40 50 60 70 80 90 100 2011 100% 7/10 New Performance Measure Target
Watercare Services Limited 2011 ANNUAL REPORT Laboratory Technicians Shanaz Taz (left) and Monaz Bharucha carry out nutrient analysis on water samples using the Flow Injection Analyser. Weblinks Water and wastewater facts Fig. 1 Grading of water treatment plants and networks Fig. 8 Drinking water quality Fig. 9 Typical analysis of Auckland’s drinking water Fig. 10 Water supply interruptions Fig. 11 Water supply restoration Fig. 12 Water quality complaints Fig. 13 1F. Percentage performance against Statement of Corporate Intent target: unaccounted-for water loss. 10 20 30 40 50 60 70 80 90 100 2011 100% 7/10 New Performance Measure 8-month target
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