Water purification methods

MechanicalActivated carbonIodine basedChlorine basedSilver basedUV light
filtrationfiltrationchemicalchemical treatmentchemical
(0.1–0.2 µm)treatmenttreatment
Virtually nilVirtually nilNilNilNilNil
Good but blocksGoodNilNilNilNil
filter rapidly
NilGoodIneffective: killsIneffective: killsNilProbably nil
algae but doesalgae but does
not neutralisenot neutralise
VariesVariesGenerally nilGenerally nilGenerally nilNil–low
VariesFair–goodGenerally nilGenerally nilGenerally nilNil
Generally lowFair–goodGenerally nilGenerally nilGenerally nilNil–low
Nil–lowNil–lowGoodGenerally goodVariesNil–good
  • Some benefit but low effectiveness against E. Coli.
  • Possibly best outcome if combined with iodine insert.
  • Filter life can vary significantly
  • Neutralises blue-green algae toxins
  • Also effective for chemical and heavy metal contamination, but these are probably avoidable.
  • Seems to be best solution
  • Takes 5-30 min to work.
  • Taste issue.
  • Not recommended for long-term use.
  • Good for E. Coli.
  • Ineffective against Giardia, the largest problem
  • Taste issue.
  • Not effective against Giardia or E. Coli, the major problems in Australia.
  • Effective only against Typhoid, Cholera etc, which are not major in Australia.
  • Useful for keeping water sweet under extended storage
  • Impractical for outdoor settings