Water quality indices: An additional management tool?

M. House, J. B. Ellis

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Given the present constraints on capital expenditure for water quality improvements, it is essential that best management practices be adopted whenever possible. This paper provides an evaluation of existing practices for water quality classification in the UK and assesses water quality indices (WQI's) as an additional method for monitoring trends in water quality. In comparative studies between the SSD Water Quality Index and the NWC/TWA classifications, 76% and 81% agreement, respectively, were obtained when the geometric weighted formulation of the SDD index was used. The advantages of a WQI over the NWC and TWA classificatory systems are specified, although best management practices might be afforded by the combined use of both WQI's and the NWC method.

Original languageEnglish
Pages (from-to)413-423
Number of pages11
JournalWater Science and Technology
Issue number7
Publication statusPublished - 1981


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