Investigations into the Occurrence of Water Supply Zones that Demonstrate Resistance to Phosphate Dosing for the Control of Lead in Drinking Water
Investigation of 13 UK water suppliers found three companies with a zone or zones that were resistant to phosphate use for plumbosolvency control: despite application of an appropriate dose and good control, lead concentrations had not decreased over several years. No common cause could be identified. Zones with greatest resistance had a history of exposure to significant background levels of phosphate in the source water; this requires further investigation. The majority of zones investigated had responded to phosphate; some demonstrated apparent resistance because the dose was insufficient, not applied for sufficient time or not well controlled. The investigation was hampered by a lack of robust data on lead pipe populations.
|UKWIR Reference :- 08/DW/04/10||Published Date :- 28/01/2008|
|Retail Price (£) :- 17||ISBN :- 1 84057 471 2|