Since April 2015, +1000 organizations and people from +80 different countries have downloaded our Wood Mold Construction Manual! 


In addition to our open-source technical resources and support on our website, we've financially supported and ran in-person Wood Mold projects with partner organizations in Bangladesh, Ecuador, Kenya, and Mali. We are always looking to create new partnerships and expand our impact.

After years of testing and refining both our product and our processes, we are scaling our impact. 

Our goal is to provide safe and sustainable drinking water to over one million people worldwide by the end of 2021!

BioSand Filter Project Locations


Bangladesh is home to more than 157 million people, 56.8% of them live on less than $3.10 per day. We are working in Southwestern Bangladesh, where the drinking water situation is particularly dire. Due to rising sea levels and the country’s booming shrimp industry, the groundwater is becoming increasing saline. People are forced to either drink the saline groundwater from a well, drink bacteria contaminated surface water, or walk to and wait in long lines to get water from community slow-sand filters. We want to change that.

We've partnered with an award winning local organization, LEDARS Bangladesh, and trained them in the use of our Wood Mold and running BioSand Filter projects. Together we are providing the families of this region with safe drinking water access in their homes! 


Kenya has a population of approximately 45 million people, with 73% of residents under 30 years old. In the spring of 2016, we established a partnership with the Daho Foundation, a Kenyan NGO, to run a pilot BioSand Filter project in the Ugunja sub county of Western Kenya. This project’s initial goal was to provide BSFs to the most vulnerable community members in this region. The pilot project was a success, so we are currently planning how to scale our impact in Kenya. 


The beautiful country of Ecuador is home to 15 million people, 25% of them living below the poverty line. Access to safe drinking water remains a problem in the rural highlands of the El Oro province. We trained a local Rotary chapter, Agua Limpia Ecuador, in the production of our Wood Mold so they could implement BioSand Filter projects in their remote, mountainous communities.


    Mali is a landlocked country in West Africa where half of its population lives on less than $1.25 per day. Access to clean water is a major problem, particularly in rural areas where 45% of people lack access to clean water.

    In 2014, a group of engineering students and professors from the University of Illinois at Urbana-Champaign traveled to Mali to train a rural village in the use of BioSand Filters with the hopes that local community members could start a filter business in the future. 

    When the group arrived in Mali, they realized the steel mold they had contracted to be made by a local welder had been made incorrectly. Searching for an alternative solution, they found us online, contacted us, and within a matter of days had downloaded our instruction manual, purchased the necessary materials, and successfully constructed several Wood Molds. They did all of this with very little instruction from OHorizons' staff and with no electricity! 

      We’re on a mission to solve the world’s most difficult challenges. Join us and become part of the Low-Tech, High-Thinking Movement today!