UK,DRINKING WATER INSPECTORATE

UK,DRINKING WATER INSPECTORATE EUROPEAN COMMUNITY EUROPEAN UNION UK WESTERN EUROPE... 

Regulatory FDA 21CFR 176.170,176.180 BGACh. 36 UK Drinking Water Inspectorate approved... 

The use of chlorine dioxide in water systems results in its reduction to chlorite and chloride. In the UK the Drinking Water Inspectorate (DWI) restricts the use of chlorine dioxide in potable water supplies to a maximum of 0.5ppm total oxidants expressed as chlorine dioxide. This ensures that chlorite (and any chlorate) concentrations do not reach levels of potential harm to humans. 

DWI (Drinking Water Inspectorate) (1993), Further guidance on analytical systems (Department of the Environment London), Available http // www.dwi.gov.uk/regs/infolett/1993/info893.htm. 

List of Approved Products and Processes, Department for Environment, Food and Rural Affairs, Drinking Water Inspectorate, DWI, London, UK, 2003. 

The UK s trigger (Drinking Water Inspectorate, 2001) for optimising corrective water treatment to reduce plumbosolvency was 5% or more RDT samples exceeding 10 pg/1. It can be seen that this level of non-compliance was exceeded for most of the cases modelled. 

The phosphate dosed condition that was modelled (M = 0.02, E = 30) was predicted to achieve or only slightly exceed one of the UK s optimisation criteria (Drinking Water Inspectorate, 2001) for ortho-phosphate dosing, that no more than 2% of RDT samples should exceed 10 pg/1. This dosed condition has readily been achieved in practice and, where necessary, lower values of M and E have been achieved by shghtly higher phosphate doses in order to meet the 2% RDT target (Hayes et at, 2006, 2008). 

Drinking Water Inspectorate (2011). Regional water quality reports for 2005 to 2009. Last consulted 1 October 2012. Available from www. dwi.gov.uk... 

Drinking Water Inspectorate (DWI) (2001). Membrane integrity testing Membrane company level. In Review of the Adequacy of Existing Proposals for Membrane Integrity Monitoring. Available http //www.dwi.gov.uk/regs/pdf/mim.pdf, accessed May 22, 2006. 

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