When treating a volume of water greater than 1000 litres, you may find Aquatabs granules a more suitable solution than tablets. Our 5 kg tub is suitable for air transport.
When treating a volume of water greater than 1000 litres, you may find Aquatabs granules a more suitable solution than tablets. Our 5 kg tub is suitable for air transport.
99.9999%
reduction in bacteria
99.99%
reduction in viruses
99.9%
reduction in Cysts (Giardia)
1. Weigh out and dissolve 20g of Aquatabs® Granules in 1 litre of water. (Where a weighing scales is not available, the guideline is 6 level teaspoons – approximately 20g)
2. Stir to dissolve. The 1% (10,000mg/l available chlorine) solution is used to disinfect larger quantities of water as follows:
Volume of 1% solution to be added to:
Chlorine Dose Required | 10 Litres | 100 Litres | 1,000 Litres | 10,000 Litres | 100,000 Litres |
---|---|---|---|---|---|
1 mg/l | 1ml | 10ml | 100ml | 1 litre | 10 litres |
5 mg/l | 5ml | 50ml | 500ml | 5 litres | 50 litres |
10 mg/l | 10ml | 100ml | 1 litre | 10 litres | 100 litres |
Note: 1mg/l = 1 ppm available chlorine.
3. Pre-treatment should ensure that the water turbidity is less than 5 NTU before chlorinating.
4. Ensure that a minimum contact time of 30 minutes is allowed before consumption.
5. Ensure a thorough mix, by recirculation where appropriate.
6. Always test for residual chlorine levels. It is desirable to leave a residual chlorine level of 0.3-0.5 mg/l after 30 minutes contact.
7. During outbreaks it is recommended that chlorine residuals should be maintained as follow:
0.5 mg/l at all points in the supply
1.0 mg/l at standposts and wells
2.0 mg/l in tanker trucks at filling
Treatment of drinking water is usually carried out using a stock solution at 1%. Water for hand washing and sanitising is required at 0.05% (500 mg/l or ppm) For virus control, disinfecting solution is required at 0.5% (5000 mg/l or ppm)
Other reference sites for NaDCC Disinfection
- WHO recommendations on Covid-19 with NaDCC granules –
- Oxfam with Aquatabs granules for both drinking water and surface disinfection