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Private Water Supply Guidelines | Water Purification | Water Quality

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Private Water Supply Guidelines
  PRIVATE WATER SUPPLY GUIDELINES Throughout NSW there are many facilities, such as caravan parks, school camps and tourist attractions that rely on private water supplies. The sources of these suppliescan include groundwater, surface water and rainwater.Serious outbreaks of gastroenteritis have occurred as a result of people drinking contaminated water from private water supplies. However, the risk of illness can be greatly reduced by obtaining water from a good quality source and regularly maintaining and monitoring the water supply system.The NSW Government has endorsed the  Australian Drinking Water Guidelines 2004 published by the National Health and Medical Research Council and the Natural Resource Management Ministerial Council. The  Australian Drinking Water Guidelines 2004  differ from the previous 1996 Guidelines by adopting a risk management approach for water supplies. Chapter 4 of the  Australian Drinking Water Guidelines  provides advice on application of the Guidelines to small water supplies.The Private Water Supply Guidelines (the Guidelines) aim to assist operators to comply with the requirements of the  Australian Drinking Water Guidelines 2004 .The Guidelines provide detail on managing private water supplies using the risk management approach by providing information on: ã Responsibilities and Requirementsã Water Quality, ã Understanding and Protecting Your Water,ã Water Treatment,ã Monitoring and Checking, andã Public Warnings. The contact details of support agencies, references and supporting information are provided to assist operators in managing their water supplies.   Foreword NSW DEPARTMENT OF HEALTHThis document may be reproduced in whole or part for study or training purposes subject to the inclusion of an acknowl-edgement of the source and no commercial usage or sale.SHPN: EH 080176 Private Water Supply GuidelinesISBN: 978-1-74187-327-6  1 CONTENTS Foreword inside front cover Contents 1In Summary 21 Who Should Use These Guidelines 3 1.1 Australian Drinking Water Guidelines 32 Responsibilities and Requirements 4 2.1 Legislative Responsibilities 4 2.2 Other Requirements 43 Water Quality 6 3.1 Safe and Acceptable Drinking Water 6 3.2 Water Quality Problems 64 Understanding and Protecting Your Water 8 4.1 Water Supply Management Plan 8 4.2 Water Sources 9 4.3 Storage and Distribution 13 4.4 Multiple Barriers 135 Water Treatment 14 5.1 Routine Treatment 14 5.2 Water Treatment After Contamination 156 Monitoring and Checking 18 6.1 Routine Monitoring 18 6.2 Checking Treatment Processes 18 6.3 Checking the System and Keeping Records 207 Public Warnings 21 7.1 Treated Systems 21 7.2 Untreated Systems 238 Reference Documents 249 Contacts for Additional Information 2510 Supporting Information 26 10.1 Water Supply Management Plan 26 10.2 Regular Maintenance Check List - Template 28 10.3 Tests and Drinking Water Guidelines Values for Private Water Supplies 29 10.4 Common Sources of Contaminants and Preventive Measures 33 10.5 Calculating the Size of Your Tank for Chlorination 34 10.6 Chlorine Concentration - Ready Reckoners for Water Tanks 35  2 Water is essential to life. We use it for drinking, cooking, bathing and washing. Unfortunately, water can also carry disease-causing organisms and toxic materials. Because water is so important, it is critical that the water we use is protected from these contaminants. These Guidelines are designed to assist private water supply operators in providing water that is safe to use. In Summary ã Operators should have a water supply management plan to ensure that safe water is provided (see Section 4.1 and Section 10.1). ã  NSW Health recommends that operators regularly test the quality of their drinking water (see Section 6.1), check results against Australian Drinking Water Guideline values (see Section 10.3) and (if necessary) take action immediately to ensure the safety of the water. ã If test results show that E. coli,  chemicals or blue green algae contamination is present in the water, consumers should be warned with a sign displayed at each tap used for drinking (see Section 7). ã If the water is contaminated with microorganisms the water should be boiled before use or an alternative water supply, such as bottled water, should be provided. ã If a private water supply is not monitored or treated then consumers should be warned that the water might not meet health guidelines (see Section 7.2). ã If chlorinating the water, it should be tested at least weekly for free chlorine to ensure that the treatment is working properly. Chlorine levels in the water can be tested on site and should be at least 0.5 milligrams per litre (see Section 5.1.2). ã Operators should regularly check their water supply system to ensure its safety (see Section 6.3). Records of these checks and test results should be kept for at least two years. ã Contact your local Council or Public Health Unit for advice (see Section 9 for contact information). PRIVATE WATER SUPPLY GUIDELINES
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