Investigations into the Occurrence of Water Supply Zones that Demonstrate Resistance to Phosphate Dosing for the Control of Lead in Drinking Water

Price: £17  

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/04/10Published Date :- 28/01/2008
Retail Price (£) :- 17ISBN :- 1 84057 471 2