Updated on January 2, 2024


Created on August 30, 2020

UZ-1 Household Water Filter

The UZ-1 is a hollow fiber membrane household water filtration unit.

Developed By
  1. Uzima
Tested By
Content Partners


Product Description

The UZ-1 Water Filter is a hollow fiber membrane water filter, designed, manufactured, and distributed by Uzima in the USA. Each filter contains bundles of hollow fibers designed to allow only water molecules to pass through the filter, filtering out anything larger than 0.1 microns (bacteria, cysts, protozoa). UZ-1 filters are sold as boxsets. Each box contains 10 UZ-1 filters, 10 bucket connectors, 11 water taps, and 11 educational materials.

Target SDGs

SDG 6: Clean Water and Sanitation

SDG 3: Good Health and Well-Being

Market Suggested Retail Price


Target Users (Target Impact Group)

Household, Public Sector Agencies, NGOs

Distributors / Implementing Organizations

Uzima Clean Water Mission is an organization that coordinates the purchase of products for communities by NGOs. In Kenya, this product has been implemented by NGOs such as e3kids, Just One Africa, and Pregis. The product has also been implemented by HOI in Honduras.

Competitive Landscape

Manufacturing/Building Method

The UZ-1 is mass-manufactured in the USA by Uzima.

Intellectural Property Type


User Provision Model

The product is largely marketed for purchase and distribution by humanitarian organizations. Alternatively, users can obtain the product directly from Uzima.

Distributions to Date Status

As of 2019, approximately 4,000 units have been distributed.

Target use case

Household use

Manufacturer-specified flow rate (L/hr)

1 L/hr

Bacteria reduction

4 log (E. coli, Salmonella typhi (Typhoid), Vibrio cholerae (Cholera))

Type of membrane filtration

Hollow Fiber Membrane

Virus reduction


Protozoa reduction

6 log (Cryptosporidium & Giardia)

Heavy metals and/or arsenic reduction


Maximum recommended influent turbidity level (NTU)


Effluent turbidity levels (NTU)


Material of construction


Safe water storage capacity (L)

20 L

Manufacturer-specified lifetime volume (L)


Design Specifications

The gravity-fed membrane micro-filtration product is assembled by the purchaser. The filter consists of hollow fiber membrane technology, with a pore size of 0.1 microns. Standard installation requires acquiring two 20 L buckets, one of which must have a lid (upper bucket). Holes must be drilled in the buckets in accordance with the instructions provided by the manufacturer. The final product consists of two 20 L buckets stacked on top of each other. The top bucket is filled with raw water. This bucket has the filter cartridge screwed into the bottom of it. Water flows from the top bucket, through the filter cartridge by gravity into the bottom bucket. Water enters the filter surrounding the membrane, clean water molecules are able to pass through pores to the bottom bucket, whilst biological contaminants are unable to pass.

Product Schematics

Technical Support

The manufacturer provides support on the assembly of the filtration system. The UZ-1 requires regular cleaning to ensure working capacity.

Replacement Components



Expected lifespan of 10 years

Manufacturer Specified Performance Parameters

The filter is designed to have an effective reduction of bacteria by 6 log (coliforms).

Vetted Performance Status

Field studies of independent academic research have found that the UZ-1 filter achieved 93.8% of effective bacterial filtration.


Incorrect maintenance of the system could result in the ingestion of contaminated water causing illness.

Complementary Technical Systems

Safe water storage containers

Academic Research and References

Fagerli G., et al, 2018, Evaluation of use, acceptability and effectiveness of household water filter systems in Honduras 2016-2017 Journal of Water, Sanitation, and Hygiene for Development

World Health Organisation, 2019, Results of Round II of the WHO International Scheme to Evaluate Household Water Treatment Technologies. Licence: CC BY-NC-SA 3.0 IGO.

K. Fagerli et al., “Evaluation of use, acceptability, and effectiveness of household water filter systems in Honduras, 2016–2017,” J. Water Sanit. Hyg. Dev., vol. 8, no. 4, pp. 809–816, 2018.

“UZ-1 ~ Household Water Filter ~ Uzima Water Filters Water Filters,” Uzima Water Filters, 02-May-2018. Available: https://uzimafilters.org/our-products/uz-1/

“Manufacturer,” HOI – Honduras Outreach International, 18-Sep-2020. Available: https://hoi.org/

“E3 Kids International?::: Equipping, Empowering & Educating Youth,” e3kids international. Available: https://e3kids.com

“Sustainable Clean Water Solutions for Kenya – Just One Africa,” Just One Africa – Creating sustainable solutions for vulnerable children and the clean water crisis., 12-Feb-2015. Available: https://www.justoneafrica.org/clean-water/

“Giving Back,” Pregis.com. Available: https://www.pregis.com/sustainable-packaging/giving-back/

“Uzima Water Filters Online Store,” Uzima Water Filters. Available: https://shop.uzimafilters.org/

“Goal 6,” Sdgs.un.org. Available: https://sdgs.un.org/goals/goal6

“UZIMA Trademark of Uzima Filters, Inc. – Registration Number 4985163 – Serial Number 86676877?:: Justia Trademarks,” Justia.com. Available: http://trademarks.justia.com/866/76/uzima-86676877.html

Uzimafilters.org, 2015. Available: https://uzimafilters.org/wp-content/uploads/2018/05/BCN-Microbiological-Results-UZima-FIlter-091815.pdf

“Bucket-Assembly-Instruction,” Uzimafilters.org. Available: https://uzimafilters.org/wp-content/uploads/2018/05/Bucket-Assembly-Instructions.compressed.pdf

Uzimafilters.org. Available: https://uzimafilters.org/wp-content/uploads/2018/06/UZ-1-Filter-Usage-Cleaning.pdf

CAWST, “UZima Filter UZ1,” UZima Filter UZ1. Available: https://www.hwts.info/products-technologies/f23373fe/uzima-filter-uz1/technical-information

Compliance with regulations

US Environmental Protection Agency (EPA) goals for microbiological reduction were used to assess the UZ-1 filter, by BCA Laboratories. The study found that the filters were able to reduce bacteria levels by 6 log (coliform). Compliance with WHO performance metrics for the reduction of bacteria and protozoa.

Evaluation methods

Effective removal of coliforms, in compliance with WHO safe water drinking guidelines, is cited as an evaluation criterion by the manufacturers.

Other Information

Uzima is partnered with the Center for Affordable Water and Sanitation Technology (CAWST). The product is featured on the CAWST site in Products & Technologies. The product is purchased as a set of 10. Each set contains 10 UZ-1 filters, 10 bucket connectors, 11 water taps, 11 filter cleaners, and 11 educational brochures. Buckets are sold separately.

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