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Volume 11, Number 2—February 2005

Research

Sporadic Cryptosporidiosis Decline after Membrane Filtration of Public Water Supplies, England, 1996–2002

Stella Goh*, Mark Reacher†Comments to Author , David P. Casemore‡, Neville Q. Verlander§, André Charlett§, Rachel M. Chalmers¶, Margaret Knowles#, Anthony Pennington*, Joy Williams*, Keith Osborn**, and Sarah Richards††
Author affiliations: *Carlisle and District Primary Care Trust, Carlisle, United Kingdom; †Health Protection Agency, Cambridge, United Kingdom; ‡University of Wales, Aberystwyth, Ceredigion, Wales, United Kingdom; §Health Protection Agency Centre for Infections, Colindale, London, United Kingdom; ¶Singleton Hospital, Swansea, Wales, United Kingdom; #Cumberland Infirmary, Carlisle, United Kingdom; **United Utilities, Great Sankey, Warrington, United Kingdom; ††West Cumberland Hospital, Whitehaven, United Kingdom

Main Article

Table A1

Water sources, water distribution zones, filtration, and populations served, Copeland and Allerdale Local Authorities, 1996–2002

Water sources Water zones Filtration of water supplies Average population
Crummock Lake Crummock North
Crummock South Unfiltered March 1, 1996–February 29, 2000;
membrane filtration from March 1, 2000, to August 31, 2002 58,295
Ennerdale Lake Ennerdale North
Ennerdale South Unfiltered March 1, 1996–February 29, 2000;
membrane filtration from March 1, 2000, to August 31, 2002 47,780
"Other*" Millom
Quarry Hill
Hausegill
Hayknott
Underscar
Bridgend
Fellside
Multiple sources
Private Conventionally filtered* throughout the study
period (March 1, 1996–August 31, 2002) 59,699

*A variety of conventionally treated and unfiltered water, and private supplies.

Main Article

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