Drinking Water Quality Management Plan
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DRINKING WATER QUALITY MANAGEMENT PLAN August 2018 CONTENTS 1 INTRODUCTION ............................................................................................................ 1 1.1 Registered service details ............................................................................................... 1 1.2 Key Stakeholders ............................................................................................................ 3 2 DETAILS OF THE WATER SUPPLY SYSTEMS ........................................................... 4 2.1 Catchment Characteristics .............................................................................................. 4 2.2 Cunnamulla Water Supply .............................................................................................. 6 2.3 Eulo Water Supply .......................................................................................................... 9 2.4 Wyandra Water Supply ................................................................................................. 11 2.5 Yowah Water Supply .................................................................................................... 12 3 WATER QUALITY ASSESSMENT ............................................................................... 14 3.1 Review of water quality data ......................................................................................... 14 3.1.1 Health related performance ................................................................................. 14 3.1.2 Aesthetic performance ......................................................................................... 14 3.2 Customer complaints .................................................................................................... 14 4 HAZARD IDENTIFICATION AND RISK ASSESSMENT .............................................. 15 4.1 Methodology ................................................................................................................. 15 4.1.1 Hazard identification ............................................................................................ 15 4.1.2 Unmitigated risk assessment ............................................................................... 15 4.1.3 Preventive measures and mitigated risk assessment ........................................... 15 4.1.4 Risk descriptors ................................................................................................... 16 4.1.5 Procedures .......................................................................................................... 17 4.1.6 Risk acceptability ................................................................................................. 17 4.2 Risk Assessment Workshop ......................................................................................... 17 4.3 Risk Assessment Outcomes ......................................................................................... 18 5 RISK MANAGEMENT .................................................................................................. 23 5.1 Secure supplies ............................................................................................................ 23 5.2 Reservoir integrity ......................................................................................................... 23 5.3 Network integrity ........................................................................................................... 23 5.4 Disinfection ................................................................................................................... 23 5.5 Operation and Maintenance Procedures ....................................................................... 24 5.6 Records Management ................................................................................................... 25 6 INCIDENTS AND EMERGENCIES ............................................................................... 26 7 WATER QUALITY MONITORING ................................................................................ 28 7.1 Operational Monitoring .................................................................................................. 28 7.2 Verification Monitoring .................................................................................................. 28 7.2.1 Responses and Corrective Actions ...................................................................... 29 8 RISK MANAGEMENT IMPROVEMENT PROGRAM .................................................... 30 9 REVIEW AND AUDIT ................................................................................................... 31 9.1 DWQMP Review ........................................................................................................... 31 9.2 DWQMP Audit .............................................................................................................. 31 10 REFERENCES ............................................................................................................. 32 TABLES Table 1 Water Supply Details ............................................................................................. 2 Table 2 Key Stakeholder List .............................................................................................. 3 Table 3 Cunnamulla Water Mains – Pipe Diameter and Age Characteristics ...................... 6 Table 4 Infrastructure Details – Cunnamulla Water Supply System .................................... 8 Table 5 Eulo Water Mains – Pipe Diameter and Age Characteristics .................................. 9 Table 6 Infrastructure Details – Eulo Water Supply System .............................................. 10 Table 7 Wyandra Water Mains – Pipe Diameter and Age Characteristics ......................... 11 Table 8 Infrastructure Details – Wyandra Water Supply System ....................................... 12 Table 9 Yowah Water Mains – Pipe Diameter and Age Characteristics ............................ 13 Table 10 Infrastructure Details – Yowah Water Supply System .......................................... 13 Table 11 Consequence descriptors .................................................................................... 16 Table 12 Likelihood descriptors .......................................................................................... 16 Table 13 Uncertainty descriptors ........................................................................................ 16 Table 14 Risk matrix ........................................................................................................... 17 Table 15 Risk Assessment Team ....................................................................................... 18 Table 16 Unmitigated Hazard Assessment Results ............................................................ 19 Table 17 Risk Assessment Results .................................................................................... 20 Table 18 Operations and Maintenance Procedures ............................................................ 24 Table 19 Incident and Emergency Levels ........................................................................... 26 Table 20 Emergency Contacts List ..................................................................................... 27 Table 21 Operational Monitoring ......................................................................................... 28 Table 22 Verification Monitoring – E. coli ............................................................................ 29 Table 23 Verification Monitoring – Physical and Chemical Parameters............................... 29 Table 24 Risk Management Improvement Program ............................................................ 30 FIGURES Figure 1 Paroo Shire Overview ........................................................................................... 2 Figure 2 Great Artesian Basin showing recharge areas (Smerdon et al. 2012) ................... 5 Figure 3 Schematic of Cunnamulla Water Supply System .................................................. 7 Figure 4 Schematic of Eulo Water Supply System .............................................................. 9 Figure 5 Schematic of Wyandra Water Supply System ..................................................... 11 Figure 6 Schematic of Yowah Water Supply System ........................................................ 13 APPENDICES Appendix A Water Quality Summary Appendix B Bore Reports DOCUMENT CONTROL Version Date Author Reviewer Draft P2 May 2013 D. Turner G. Cook A June 2013 D. Turner G. Cook B November 2013 D. Turner G. Cook C August 2018 S. Hinton P. See Drinking Water Quality Management Plan August 2018 1 INTRODUCTION Paroo Shire Council aims to protect public health through the identification and minimisation of any public health related risks associated with the reticulated drinking water supplies. This Drinking Water Quality Management Plan (DWQMP) is Paroo Shire Council’s documented, risk-based system for managing the safe supply of drinking water. It is intended that this plan be a living document that reflects the current obligations of Council as the service provider as well as the improvements required to ensure a safe supply of water into the future. To ensure that these goals are met, senior management has been actively involved in the development and implementation of the plan and encourage an organisational philosophy and culture that supports drinking water quality. The plan is viewed by Council as a means