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.