Volume 11, Number 2—February 2005
Sporadic Cryptosporidiosis Decline after Membrane Filtration of Public Water Supplies, England, 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.
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