Updated on January 24, 2024


Created on September 10, 2020

Folia Filter

The Folia Filter is a silver nanoparticle infused antimicrobial filter for water purification.

Developed By
  1. Folia Water
Tested By
  • Folia Water
Content Partners


Product Description

The Folia Filter is a paper-based, copper and silver nanoparticle infused antimicrobial water filter designed to purify water from tap, tube-wells, rivers, lakes, and ponds. The funnel design of the filter allows it to accommodate existing consumer water habits. The filter is designed, manufactured, and distributed by Folia Water.

Target SDGs

SDG 6: Clean Water and Sanitation

SDG 3: Good Health and Well-Being

Market Suggested Retail Price


Market Suggested Retail Price (Secondary Currency)

20 BDT

Target Users (Target Impact Group)


Distributors / Implementing Organizations

Folia Water

Competitive Landscape

Direct competitors include EcoFiltro and Nazava Water Filter.

Manufacturing/Building Method

This product is currently in the prototyping phase and as such is batch produced 100,000 units at a time at the Pilot Paper Plant facility of Western Michigan University in Kalamazoo, Michigan.

Intellectural Property Type


User Provision Model

Users can obtain Folia filters from small and large scale retail stores.

Distributions to Date Status


Target use case


Manufacturer-specified flow rate (L/hr)

3-5 L/hr

Bacteria reduction


Type of membrane filtration

Silver Particle Antimicrobial and Microfiltration

Virus reduction


Protozoa reduction


Heavy metals and/or arsenic reduction

Iron Reduction: 99.8%

Arsenic, Lead, Chlorine, Radioactive not removed

Maximum recommended influent turbidity level (NTU)


Effluent turbidity levels (NTU)


Material of construction

Silver and Copper Coated paper

Safe water storage capacity (L)

20 L

Manufacturer-specified lifetime volume (L)

20 L

Design Specifications

The Folia Filter is a silver nanoparticle coated paper microfilm. As water passes through the filter, larger debris, dirt, and microorganisms are trapped by the small porous nature of the paper filter. Additionally, the water which passes through the filter carries silver cations that act to kill bacteria and other organisms by denaturing metabolic enzymes.

Product Schematics

Technical Support

Safety precautions are provided by the manufacturer.

Replacement Components



20 L and then needs to be replaced

Manufacturer Specified Performance Parameters

The filter was designed to reduce bacteria by 99.9999%, viruses by 99.9%, protozoans by 99.99%, and iron by 99.8%.

Vetted Performance Status

Live bacteria testing trials performed in-house, results of testing are unknown.


The filter should not be stored outdoors and always kept in its protective bag until used. For an unopened bag of filters, the shelf life is 12 months. The filter should not be used when the color has changed and/or the filter itself is torn/ripped.

Complementary Technical Systems

The filter requires a funnel to store the technology for use as well as two separate water storage containers, preferably 2 L water bottles

Academic Research and References

C. ts Pennies and N. dollars:, “The world’s first water filter that,” Engineeringforchange.org. Available: https://www.engineeringforchange.org/wp-content/uploads/2020/05/5e90baefd792c05744e0fdc7_Folia-Water_Brochure.pdf 

Goal 6. (n.d.). Sdgs.un.org. Available: https://sdgs.un.org/goals/goal6

Compliance with regulations

The product meets the expectations of the WHO with a maximum of 100 ppb of silver particles in the effluent water supply.

Evaluation methods

Live bacteria testing trials

Other Information


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