Aquatabs are water purification tablets used in containers of drinking water.
Aquatabs is an individually packaged effervescent tablet that dissolves in minutes when added to water to kill microbes. These tabs are designed to reduce transmission of cholera, typhoid, dysentery, and other water-borne diseases.
Goal 6: Clean water and sanitation
Various: Household Water Treatment, Emergency & Disaster Relief, Peacekeeping & Defense Forces, Travel, Camping & Marine.
Aquatabs is registered product of Medentech Ireland.
Millions of tablets sold which treated 11 billion liters of water in 2016.
Active chemical and concentration (%) of the product (not the concentration of the treated water)
Form of the chemical disinfection
Does the water flow through a treatment system or does it remain in a container?
Is the dose of the chemical administered automatically or manually?
Manufacturer-specified dosing quantity
Manufacturer-specified time until water is potable, measured in minutes
Remaining level of chemical concentration after manufacturer-specified contact time
Laboratory-evaluated log scale removal rate of bacteria
Laboratory-evaluated log scale removal rate of viruses
Laboratory-evaluated log scale removal rate of protozoa
Reduction levels of heavy metals and/or arsenic through this treatment system
How long can the treated water remain protected and safe to drink?
Manufacturer-specified maximum level of inlet turbidity (NTU)
See Module 6 Safe Drinking Water – Aquatabs of CDC’s Community Health Worker Training Materials for Cholera Prevention and Control.
Available in 6 strengths: 3.5 mg, 8.5 mg, 17 mg, 33 mg, 67 mg, 167 mg.
Process for use shown in the image below.
The table outlines the amount of water each tablet can purify in a household setting:
|Tablet size (mg)||Liters of water (L)|
Provided by Medentech
This is a single-use product
Aquatabs have a five year shelf-life in strip packs and a three year shelf-life in tubs. All tablet products should be protected from exposure to temperature extremes or high humidity.
The solution can be kept for 7 days in any sealed container or spray bottle, 24 hours in an open container or bucket.
Aquatabs are designed to kill bacteria, viruses, and cysts in water.
The Aquatabs website states that Efficacy and Acceptability studies have been conducted in several countries throughout the world. This includes independent field trials in a wide range of waters (pH, turbidity, hardness, pathogenic challenge). The website reports successful comparative test trials and provides examples of studies undertaken.
A pilot study published by WHO included the following testing organizations: Asian Institute of Technology (Thailand), Bangladesh Council for Scientific and Industrial Research Laboratories (Dhaka, Bangladesh), and Medentech (Ireland).
Aquatabs should be used with clear water. If the water to be treated is murky / turbid, then it should be firstly filtered through a cloth until clear. If the water to be treated is being consumed from a known source (such as with a household water supply), then the low risk dosing, as shown above, can be used. In all other situations, then the high risk dosing should be used.
Water requires prior filtration (through a clean cloth or filtering system) before Aquatab use.
Clasen, T., et al., 2007, Household Water Treatment using Sodium Dichloroisocyanurate (NaDCC) Tablets: A randomized, controlled trial to assess microbiological effectiveness in Bangladesh, The American Journal of Tropical Medicine and Hygiene, Vol.76 (1), pp. 187-192
This presentation presents information about the pilot study undertaken in the usage of the Aquatabs in Dhaka, Bangladesh. Unknown date of presentation:
Aquatab is registered with the US EPA for sale in the US. Aquatabs meet the NSF/ANSI Standard 60 as certified by NSF International. The active ingredient in Aquatabs, Troclosene Sodium, is registered by the USA Environmental Protection Agency (EPA) for routine treatment of drinking water; meets European Standards for drinking water (EN 12931:2000) and the World Health Organisation (WHO) / The Food and Agricultural Organisation (FAO) specifications for drinking water.
The product is manufactured to pharmaceutical standards and certified to the European Union guidelines on Good Manufacturing Practices for medicine.
The water samples are analysed for microbial contamination before and after treatment with Aquatabs.
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