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Caution: I am not a doctor !!!!

It will depend on if you are prioritising your team or beneficiaries

For Small scale:

I am Cambodia based and our pharmacy routinely obtains from Thailand hydroclonazone 12.2 mg x 1000 tablet pack

1 tablet per litre takes about 1 hour to work, 2 hours for giardia and worst sorts. Seems to work OK and should be available

In Kenya for South Sudan we bought Micopur - 100 tabs per box - about 30 minutes for bacteria and 2 hour for giardia - very long shelf life - 1 tab per litre

Alternative is iodine - cheaper but definitely not tasty

....................................... For Emergency Chlorination / disinfection of community water supplies .................................................. WHO brief guide on emergency chlorination recommends potential chloride sources as... - Sodium Hypochlorite: liquid form e.g. typical chlorine based household disinfectant (5 to 15% available chlorine), laundry bleach (5%) or antiseptic "baby care" products (1 to 2 %). Avoid using scented disinfectants as this will taint the water - Calcium Hypoclorite: Available in granules known as High Test Hypochlorite, HTH with 60 to 70 percent available chlorine. The handbook notes the needs for "careful planning and coordination with local health posts and district health team" - bleaching powder or chlorinated lime (20 to 35 % available chlorine) Bleaching powder needs to be carefully mixed with a little water to make a cream paste stirring with a wooden rod. Then add more water to achieve a one percent solution - Water purification tablets. These usually contain 1 mg or chlorine or typically 2 mg of iodine. They are designed to treat 1 litre of clear water, but leave a taste. Most tablets have a shelf life and need to be stored in a cool dark place

NOTE STRONG CONCENTRATIONS OF CHLORINE ARE DANGEROUS

................................................................................. You might be well advised to think of Malaria -I am not sure of Myanmar risk but for provincial work in Cambodia we use doxycycline 100mg tabs which is readily available

Caution: - make sure you go to a good pharmacy, check how they store their stocks and check expiry date - is a lot of badly stored and out of date medicine around even in cities

Regards,

Chris Nixon