Monitoring of distribution water qualities under various source water blending

James Taylor, Zhijian Tang, Weizhong Xiao, Seungkwan Hong

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The main goal of this large-scale pilot distribution study was to systematically investigate the impacts of blending different source waters on distribution water qualities. The principal source waters investigated were conventionally treated ground water (G1), surface water processed by enhanced treatment (S1), and desalted seawater by reverse osmosis membranes (RO). Due to the nature of raw water quality and associated treatment processes, G1 water had high alkalinity, while S1 and RO sources were characterized as high sulfate and high chloride waters, respectively. One year of pilot pipe study demonstrated that water quality was significantly deteriorated by increased color when source water blends with characteristics different from historic groundwater were introduced to pipe distribution systems. Elevated color was associated with release of iron corrosion products, mainly from aged unlined cast iron pipes. Iron release increased significantly when exposed to RO and S1 waters: that is, the greater iron release was experienced with alkalinity reduced below the background of G1 water. Lead and copper release to water, on the other hand, enhanced with the application of RO and G1 waters, respectively.

Original languageEnglish
Pages (from-to)59-71
Number of pages13
JournalEnvironmental Monitoring and Assessment
Issue number1-3
Publication statusPublished - 2006


  • Advanced surface water treatment
  • Pipe corrosion
  • Pipe distribution water qualities
  • Sea water desalination
  • Source water blending

ASJC Scopus subject areas

  • Environmental Science(all)
  • Pollution
  • Management, Monitoring, Policy and Law


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