safe storage

  • main goal is to avoid recontamination after
    • obtaining water from clean sources
    • or having treated water to drinkable levels

opening

  • small enough to discourage hands, scooping
  • large enough for easy filling
  • screw cap
  • possible to clean

extracting water

  • tap or spigot for withdrawing water

other desirable characteristics

  • portable
    • transportation from collection center to household
  • stable (flat bottom), robust, opaque
  • size appropriate for treatment
  • inexpensive, available locally

combinations

  • typical combination:
    • filtration + chlorine + safe storage

informal combination

  • level 1:
    • sedimentation, roughing filtration, ceramic filtration or bio-sand filter
  • level 2:
    • heat, SODIS, chlorine
  • level 3:
    • safe storage container

coagulation and chlorination

  • informal combinations
    • P&G purifier
    • watermaker
  • good for turbid water
    • requires stirring container
  • separate safe storage

formal combinations

  • filtration + disinfection
    • only for water with no turbidity
    • require replacement of filtration and disinfection cartridges