2019-20 Water Quality Report
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2019-20 WATER QUALITY REPORT our water our customers healthy living AT A GLANCE Traditional Owners Acknowledgement total population serviced Central Highlands Water acknowledges the Traditional 152,273 Owners / Peoples of the region we work in, including total water the Dja Dja Wurrung, Wadawurrung, Wurundjeri, Djab Wurrung, Wotjobaluk, Jaadwa, Jadawadjali, Wergaia and supply connections 72,128 Jupagulk Peoples. total potable water We pay our respect to the Elders of these communities past, supply volume present and emerging, acknowledging that they have been 14,020 ML custodians of land and water for many centuries and that their continuing culture and contribution is important to the life water of the region. 15 treatment plants 30 reservoirs diversion 13 weirs groundwater 34 bores bulk water 17 entitlements held of water 2,551 KM mains service basins 47 and tanks water 41 pumping stations Additional copies ISSN: 2204-1192 (Online) This water quality report is available for viewing or download from © State of Victoria, Central Highlands Water 2020. Central Highlands Water’s website, www.chw.net.au This publication is copyright. No part may be reproduced by any process To minimise our impact on the environment, we print limited numbers of except in accordance with the provisions of the Copyright Act 1968. this report and we encourage you to view this report online. If you require This report has been printed on ecoStar 100% recycled stock. any additional printed copies, please contact Central Highlands Water at: Email: [email protected] Phone: 1800 061 514 Cover image: Pincotts Reservoir, Mathew Leehane (Advisor – Civil Post: PO Box 152 Ballarat Vic 3353 Maintenance Planner) water quality testing, Ronak Patel (Chemist) CHW In person: 7 Learmonth Rd Wendouree Vic 3355 Laboratory, Shannon Haintz (Communications and Engagement Lead) and ABN: 75 224 340 348 Elva Haintz (taken in September 2018) CHW Education program. 2 CONTENTS PART 1 INTRODUCTION TABLES AND FIGURES About us 4 Table 1: Sources of water 9 Summary 4 Table 2: Reservoir capacity and current levels 10 Drinking water quality policy 4 Table 3: Treatment processes and added Drinking water regulatory framework 5 substances for supply systems 13 Undertakings, exemptions and determinations under the Act 5 Table 4: Complaints comparison 2019-20 to previous reporting periods 14 Community information 5 Table 5: Complaints by water supply system 2019-20 15 PART 2 DRINKING WATER SUPPLY SYSTEMS Table 6: Customer communications issued 16 Overview 6 Table 7: Escherichia coli (E. coli) – Customer Taps 20 Figure 1: Escherichia coli (E. coli) Trending – Customer Taps 21 Sources of water 7 Table 8: Escherichia coli (E. coli) – Entry Points 22 Service area 8 Table 9: Escherichia coli (E. coli) – Network Treated Water treatment plants 11 Water Storages 23 Treatment processes 11 Table 10: Trihalomethanes 24 Figure 2: Trihalomethanes Trending 25 Added substances 12 Table 11: Turbidity – Customer Taps 26 Disinfection 12 Figure 3: Turbidity Trending – Customer Taps 27 Fluoridation 12 Table 12: Turbidity – Entry Points 28 Distribution 12 Table 13: Turbidity – Network Treated Water Storages 29 Table 14: Fluoride 30 PART 3 CUSTOMER FEEDBACK Figure 4: Fluoride Trending 31 Complaints 14 Table 15: Chloroacetic Acid 32 Complaints categories and our response 15 Figure 5: Chloroacetic Acid Trending 33 Customer engagement 16 Table 16: Dichloroacetic Acid 34 Figure 6: Dichloroacetic Acid Trending 35 Customer communications 16 Table 17: Trichloroacetic Acid 36 Figure 7: Trichloroacetic Acid Trending 37 PART 4 WATER QUALITY MANAGEMENT Table 18: Bromate 38 Overview 17 Figure 8: Bromate Trending 38 Risk management 17 Table 19: Formaldehyde 39 Risk management plan 17 Figure 9: Formaldehyde Trending 39 Audit of risk management plan 17 Table 20: Aluminium (acid soluble) 40 System auditing 17 Figure 10: Aluminium (acid soluble) Trending 41 Verification and monitoring program 17 Table 21: Aesthetic Parameters – pH 42 Control measures 18 Figure 11: pH Trending 43 Table 22: Aesthetic Parameters – Total Dissolved Solids 44 Figure 12: Total Dissolved Solids Trending 45 PART 5 WATER QUALITY RESULTS AND ANALYSIS Table 23: Aesthetic Parameters – True Colour 46 Performance monitoring and compliance criteria 19 Figure 13: True Colour Trending 47 Water testing analysis 19 Table 24: Aesthetic Parameters – Hardness 48 Compliance with drinking water quality standards 19 Table 25: Aesthetic Parameters – Iron 49 Compliance performance summary 19 Table 26: Aesthetic Parameters – Zinc 50 Understanding concentration and limits 19 Table 27: Aesthetic Parameters – Total Alkalinity 51 Table 28: Other substances – Free Chlorine 52 PART 6 EMERGENCY AND INCIDENT MANAGEMENT Table 29: Other substances – Monochloramine 53 Section 18 incidents 69 Table 30: Other substances – Cadmium 54 Section 22 incidents 69 Table 31: Other substances – Copper 55 Table 32: Other substances – Lead 56 PART 7 WATER QUALITY IMPROVEMENT PROJECTS Table 33: Other substances – Manganese 57 Source water improvements 70 Table 34: Other substances – Nickel 58 Water treatment plant improvements 71 Table 35: Other substances – Chromium (total) 59 Distribution system improvements 72 Table 36: Other substances – Arsenic 60 APPENDICES Table 37: Other substances – Cyanide 61 Table 46: Summary of audit findings 73 Table 38: Other substances – Mercury 62 Audit certificate 74 Table 39: Other substances – Selenium 63 Abbreviations 75 Table 40: Other substances – NDMA 64 Table 41: Health related organic compounds 65 Table 42a: Pesticides 66 Table 42b: Pesticides (continued) 67 Table 43: Radiological Parameters 68 Table 44: Section 18 incident summary 69 Table 45: Section 22 incident summary 69 Central Highlands Water 2019-20 Water Quality Report 3 PART 1 INTRODUCTION About us Drinking water quality policy Central Highlands Water (the Corporation, CHW) supplied This policy outlines our commitment to managing our water 14,020 megalitres of potable water to customers throughout supply systems effectively in order to provide safe and the Central Highlands region of Victoria during 2019-20. high-quality drinking water that satisfies the needs of our Operating across 9,275 square kilometres, we supply water customers, community and regulators. to more than 152,200 customers through a complex network CHW is committed to: of 30 reservoirs, 15 treatment plants, 41 pump stations and • Implementing and maintaining a Water Quality Risk 2,551 kilometres of water mains in the local government Management Plan in accordance with the Safe Drinking areas of Ballarat, Central Goldfields, Golden Plains, Water Act 2003, the Safe Drinking Water Regulations 2015 Hepburn, Pyrenees, Northern Grampians, Moorabool and and other regulatory guidance that utilises a considered risk Corangamite (Skipton). management approach to ensure the supply of safe water and to protect public health. Summary • Implementing, maintaining and adequately resourcing a In accordance with the Safe Drinking Water Act 2003, this drinking water quality management system consistent with report provides an overview of CHW’s supply system, the risk the framework described in the Australian Drinking Water management and monitoring processes in place and water Guidelines (ADWG). quality performance for the 2019-20 financial year. • Managing drinking water aesthetics to meet the ‘good’ Guidance regarding the structure of this report has been criteria as defined in the Australian Drinking Water provided by the Department of Health and Human Services Guidelines (ADWG). (DHHS) in accordance with the Safe Drinking Water Act • Integrating the needs and expectations of our consumers, 2003 and the current Water Quality Annual Report Guidance stakeholders and regulators into our planning. document, June 2017. • Establishing regular monitoring of the quality of drinking water and effective reporting mechanisms to provide relevant and timely information on the management of the water supply. • Continually improving our practices by assessing performance against corporate commitments and regulatory requirements. • Ensuring all managers and employees involved in the supply of drinking water are aware of their responsibility for understanding, implementing and maintaining our drinking water quality management system. • Ensuring this policy is highly visible, continually communicated, understood and implemented by all employees. 4 PART 1 INTRODUCTION Drinking water regulatory framework Undertakings, exemptions and determinations Safe Drinking Water Act 2003 under the Act No undertaking or exemptions were in place in 2019-20. The purpose of the Victorian Safe Drinking Water Act 2003 (‘the Act’) is “to make provision for the supply of safe Regulated water determination drinking water.” In accordance with the Safe Drinking Water Act 2003 the The Act defines drinking water as: “water that is intended Minister for Health may declare certain water supplies for human consumption or for the purposes connected with ‘regulated water’ to protect public health. Regulated water is human consumption, such as the preparation of food or classified as water that is not intended for drinking, but which the making of ice for consumption or for the preservation could be reasonably mistaken for drinking water. of unpacked food, whether or not the water is used for other purposes.” CHW operates three regulated water supply systems – Amphitheatre, Raglan and Redbank. The Minister for Safe Drinking Water Regulations 2015 Health declared these water supplies