Updated on November 1, 2023


Created on August 1, 2016



Ceramic pot filters that are manufactured and distributed in Kenya.

Developed By
  1. Kenya Ceramic Project (KCP)
Tested By
  • Kenya Bureau of Standards (KEBS)
Content Partners


Product Description

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.

Target Regions

East Africa

Target SDGs

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).

Competitive Landscape

Direct competitors include Living Water Treatment Systems.

Manufacturing/Building Method

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

Open Source

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)


Bacteria reduction

2 log (99%)

Virus reduction


Protozoa reduction


Heavy metals and/or arsenic reduction


Maximum recommended influent turbidity level (NTU)


Effluent turbidity levels (NTU)

99% turbidity removal

Maintenance schedule

Scrub filter when flow rate slows.

Manufacturer-specified lifetime volume (L)

~30,000 L

Safe water storage integration

Depends on size of receptacle, ~6 L

Design Specifications

The ~10 L capacity filter membrane is manufactured with clay and a burnout material and suspends in a 20 liter receptacle.

Product Schematics

Technical Support

Manufacturer, local distributor, end-user

Replacement Components

Available in country: ceramic filter element, receptacle, tap, lid.


3 years

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.

Evaluation methods

Rand working paper publication.

Other Information

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.

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