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Source of Supply 6
Welt Development 12
Water Purification 67
4 other sections not shown
amount Anopheles bacteria bathers bathing beds Board of Health bottom breeding calcium hypochlorite camp capacity cesspools chemical chlorine clean CM CM CM concrete constructed contain cubic feet cylinder deep depth destroy discharge disinfection Disposal Field drain drilled drive pipe effluent filtered water filtration fleas flies flow foot foot valve friction garbage grease Health Public Health house flies hypochlorite inches infested inlet insects installed joints larvae liquid located material method mosquitoes necessary number of gallons odors operation organic matter outlet permit placed plants poison ivy poison sumac pollution pool water possible pounds powder pressure prevent privy proper Public Health Laws pump pyrethrum quantity recirculation removed roaches Sanitary Sanitation septic tank sewage sewer slow sand filters softener soil solution spring strainer stream suction pipe surface swimming pool temperature tile tion toilet traps trench usually valve vault wastes water supply zeolite