Risk Information Table Reliable information about water quality is essential for the proper management of a water supply. Knowledgeable and skilled staff are also essential for minimising the public health risks associated with water supplies. Please read the staff training (Guide as well Guide G1) as this Guide. Abbreviations: DWSNZ Drinking-Water Standards for New Zealand – Preventive measures Checking preventive measures Corrective action Causes What to check Signs that action is needed Event: INCORRECT WATER QUALITY DATA USED FOR SUPPLY MANAGEMENT Possible hazards: Germs; chemical determinands. Level of risk: High1 G2.1.1 Prepare a sampling plan Audit of Poor records/ Improve sampling sampling plan data entry plan. (WINZ can assist here). Inappropriate/ and sampling checks not incorrect Ensure purpose of taking Find out the procedures. signed off. sampling. the sample is established. reason for taking Unacceptable the sample Periodically review sampling number of (compliance, plan to ensure it will still errors process control, achieves its purpose. detected etc). Determine that the following during audits. Undertake review. are correct: Process Consult sampling location control DWSNZ:2000. failures. sampling frequency Outliers in sampling procedure. inter-lab See the appropriate section quality control of DWSNZ:2000 or consult studies. WINZ if monitoring is for Audit of compliance purposes. sampling plan and Ensure (check with Check with procedures approved laboratory in use) laboratory. not that the sampling container Identify staff undertaken. is correct and correctly training needs preserved (if appropriate), Unexplained and provide and that sample transport compliance training. procedures are satisfactory. test failures. Ensure staff carrying out sampling are properly trained. 1 The risks associated with this event are not direct. However, without reliable information about the quality of the water being produced and distributed to consumers, good management and operational decisions to protect public health cannot be reached.
Risk Information Table Reliable information about water quality is essential for the proper management of a water supply. Knowledgeable and skilled staff are also essential for minimising the public health risks associated with water supplies. Please read the staff training Guide (Guide G1) as well as this Guide. Abbreviations: DWSNZ – Drinking-Water Standards for New Zealand Causes Preventive measures Checking preventive measures Corrective action What to check Signs that action is needed Event: INCORRECT WATER QUALITY DATA USED FOR SUPPLY MANAGEMENT Possible hazards: Germs; chemical determinands. Level of risk: High1 G2.1.1 Inappropriate/ incorrect sampling. Prepare a sampling plan (WINZ can assist here). Ensure purpose of taking the sample is established. Periodically review sampling plan to ensure it will still achieves its purpose. Determine that the following are correct: sampling location sampling frequency sampling procedure. See the appropriate section of DWSNZ:2000 or consult WINZ if monitoring is for compliance purposes. Audit of sampling plan and sampling procedures. Poor records/ data entry checks not signed off. Unacceptable number of errors detected during audits. Process control failures. Outliers in inter-lab quality control studies. Audit of sampling plan and procedures not undertaken. Unexplained compliance test failures. Improve sampling plan. Find out the reason for taking the sample (compliance, process control, etc). Undertake review. Consult DWSNZ:2000. Ensure (check with approved laboratory in use) that the sampling container is correct and correctly preserved (if appropriate), and that sample transport procedures are satisfactory. Ensure staff carrying out sampling are properly trained. Check with laboratory. Identify staff training needs and provide training. 1 The risks associated with this event are not direct. However, without reliable information about the quality of the water being produced and distributed to consumers, good management and operational decisions to protect public health cannot be reached.
general-monitoring-feb14-v2.docx