Nazava Water Filter
Nazava is a two bucket system ceramic water filter with a storage capacity of 2*6 liters.
Nazava Transparent Water Filter is a two bucket water filter system that was mainly developed as an emergency relief water filtration kit by Lieselotte Heederik. Currently, this product is also being used as a household water filter system in many parts of Indonesia. The water is suitable for a single household and the product provides a storage capacity of 2*6 L and a flow rate of 2-3 L/hr.
Indonesia and Ethiopia
Sales are primarily carried out by a network of 122 local resellers who sell in different parts of the country. This product is also being commercialized by diverse NGOs and through direct sales.
~20 USD for the complete unit, ~8 USD for replacement candle filters
Goal 6: Clean water and sanitation
The ceramic candles are made locally in Indonesia.
Open-source design but the candle filters may be patent protected.
As of 2020, over 145,000 units have been distributed.
Description of the type of ceramic filter (pot, candle, or disk)
What primary material is used (ceramic, mud, clay etc.)?
Additional materials added to improve disinfection
Manufacturer-specified flow rate (L/hr)
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
Manufacturer-specified maximum level of inlet turbidity (NTU)
Range or value of outlet turbidity levels (NTU)
How often/when should maintenance be performed?
What is the total number of liters that is recommended can be filtered?
Is there safe water storage integrated into this product?
The Nazava Transparent Water Filter is a two bucket ceramic water filter system. It is mainly designed for a household of 4 people. The specifications of the filter include:
- Volume of storage: 2*6 L
- Flow speed: 2-3 L/hour
- Capacity: 7000 L before replacement
- Material of container: Polyethylene plastic
- Mechanism of water filter: Ceramic filtration with impregnation of silver to kill germs and Activated carbon to improve the taste
- Pore size: 0.4 micron
The manufacturer provides online training videos on proper use and maintenance of the units.
Available for purchase from the retailer.
Nazava provides a 1-year warranty with the filter capacity of up to 7,000 liters of water.
This filter was designed to reduce bacteria by 99.99%, >99.99% protozoa, and 99% turbidity. The product was also designed to provide a flow rate of 2-3 Liters per hour.
According to laboratory testing carried by WHO, the Nazava Water Filter protects against bacteria and protozoa only.
Several National and International organizations have tested the reliability of the Nazava filter.
No known safety risks if used properly.
Chaudhuri, M., Verma, S. R., & Gupta, A.,1994, Performance evaluation of ceramic filter candles, Journal of Environmental Engineering, 120(6), 1646-1651.
Zievers, J. F., & Zievers, E. C.,1993, Reinforced ceramic filter candle and method of making same, U.S. Patent No. 5,223,138. Washington, DC: U.S. Patent and Trademark Office.
Carlsen, M., & Waddell, K.,2016, Nazava Water Filters; Social Impact Assessment.
Holtslag, H., & Mc Gill, J. Practical ideas to reach SDG6.
Cadeddu, S. B., Donovan, J. D., Topple, C., De Waal, G. A., & Masli, E. K. (2019), Frugal Innovation and the New Product Development Process: Insights from Indonesia, Routledge.
Manufacturer states that Nazava complies with the drinking water standard of WHO for the microbial test mainly bacteria and protozoa removal.
Filters have been tested in laboratories worldwide.
Nazava Water Filters received the 2013 Laureate of The Tech Awards and was the winner of the 2016 Ashden Award for Sustainable Energy and Water.
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