The CeraMaji is a silver enhanced ceramic ‘pot’ water filter for household drinking water treatment. This product is manufactured in Kenya and is an open source technology promoted by Potters for Peace.
SDG 6: Clean Water and Sanitation
Market Suggested Retail Price
Target Users (Target Impact Group)
Distributors / Implementing Organizations
Sold in supermarkets and through health care and health good providers, and through the Safe Water and AIDS Project (SWAP).
Direct competitors include Living Water Treatment Systems.
The product is manufactured in factories in Kenya by locally sourced clay and a burnout material are processed then mixed with water, pressed into the filter shape, fired to a ceramic state, flow rate tested to ensure production consistency and coated with silver.
Intellectural Property Type
User Provision Model
Filters can be purchased in supermarkets and through health care and health good providers.
Distributions to Date Status
Ceramaji filters have reached >100,000 people (~20,000 units) in communities in Kenya and neighbouring countries.
Type of filter
Ceramic pot filter
Primary material of construction
Filters are manufactured with clay, a burn-out material, and silver.
There is a potential for silver in filtered water, below secondary guideline values of 0.1 mg/L.
Manufacturer-specified flow rate (L/hr)
2 log (99%)
Heavy metals and/or arsenic reduction
Maximum recommended influent turbidity level (NTU)
Effluent turbidity levels (NTU)
99% turbidity removal
Scrub filter when flow rate slows.
Manufacturer-specified lifetime volume (L)
Safe water storage integration
Depends on size of receptacle, ~6 L
The ~10 L capacity filter membrane is manufactured with clay and a burnout material and suspends in a 20 liter receptacle.
Manufacturer, local distributor, end-user
Available in country: ceramic filter element, receptacle, tap, lid.
Manufacturer Specified Performance Parameters
2 log reduction in bacteria
Vetted Performance Status
The product should be cleaned regularly
Complementary Technical Systems
Pre-filter or settle very turbid water (>5 NTU)
Academic Research and References
“Safe Water & AIDS Project,” Swapkenya.org. Available: https://www.swapkenya.org/
“CeraMaji,” ICChange. Available: https://www.icchange.ca/ceramaji
“Goal 6,” Sdgs.un.org. Available: https://sdgs.un.org/goals/goal6
CRAKenya, “Kenya Bureau Of Standards (KEBS),” Kebs.org. Available: https://www.kebs.org/index.php
J. E. Luoto and D. I. Levine, “Mobile phones, rent-to-own payments & water filters,” Rand.org. Available: https://www.rand.org/content/dam/rand/pubs/working_papers/WR1000/WR1039/RAND_WR1039.pdf
“Global Health,” Ualberta.ca. Available: https://www.ualberta.ca/public-health/research/areas-of-research/global-health.html
Compliance with regulations
Manufacturer reports filters received certification from the Kenya Bureau of Standards in 2011.
Rand working paper publication.
The Kenya Ceramic Project also manufactures CeraJiko high efficiency cook stoves. The Kenya Ceramic Project was established in collaboration with University of Alberta and ICCHANGE.