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Biosand Filter
Biosand Filter
49 members
2 questions
19 posts

This is a discussion group for the Biosand filter technology.

Discussion and sharing of lessons learnt, best practices and experience in implementing Biosand filter projects.

This group is maintained by CAWST (Centre for Affordable Water and Sanitation Technology) to provide updates, generate feedback and discussion on the implementation of Biosand Filters.

For more information visit CAWST's Biosand Filter KnowledgeCAWST's website, and learn about our training and services as well as education and training material for download.

Biosand Filters

Lets Grow the Platform Together

Hi All

Welcome to KnowledgePoint. I am hoping we can turn this into the Facebook for WASH.

Marike Kuyper
Global Learning Advisor

Getting Started with KnowledgePoint

HWTS 2022 Annual Network Meeting

2022 Annual Network Meeting

Thursday, November 17, 8 - 10 a.m. MST (Check your time zone)

Delivered in English, with live translation in Spanish and French.

This meeting is interactive and will not be recorded. 

In the annual HWTS Network meeting, more than 800 members from around the world can connect live and share the latest updates on research, implementation and policy on household water treatment and safe storage (HWTS) and water safety. 

This virtual meeting will be inclusive, multidisciplinary and delivered in multiple languages. Members will hear about the latest research and progress related to HWTS on a global scale from leading experts, and join breakout sessions for discussion and idea exchange on their preferred topics. 

Register now


About the HWTS Network

Household water treatment and safe storage (HWTS) is an important public health initiative to improve drinking water quality and prevent water-borne and vector-related diseases at point-of-use. 


Network members come from government, civil society, the private sector, UN agencies, and research. Their varied and rich perspectives will be valuable to help all members to scale up HWTS in different contexts around the world, and strengthen HWTS as part of broader water safety frameworks.


Our network activities are: 

  • policy and advocacy
  • research and learning
  • implementation and scale-up 
  • monitoring and evaluation


Not a member yet? Register here; membership is free.


Water treatment
Eva Manzano
Senior WASH Advisor for Latin America, CAWST

September 20th: Webinar "Thirty years of the household slow sand filter"

Over the last thirty years, the household slow sand filter has undergone many changes to improve its performance. It’s been used by over 5 million people in 55 low- and middle- income countries to treat their drinking water. How have modifications to the design since the 1990’s made it easier to operate, and increased the likelihood of correct, consistent and continued use in homes?

In this live webinar, postdoctoral researcher @Bárbara Freitas will present a comprehensive overview of the earliest to most recent publications on the slow sand filter design. She’ll be joined by @robert wiens an expert in the field of household water treatment, with over twenty years of experience with the biosand filter, from design and implementation to addressing factors that keep families using them.

Register to expand your knowledge of the various models currently available, gain insights on design evolutions from peer-reviewed literature, and learn lessons from decades of experience and innovation in the field.

Thirty years of the household slow sand filter

Tuesday, September 20, 2022 | 8 - 9 a.m. MT

Delivered in English, with live translation in Spanish

Register now

Can’t attend live? The webinar will be available on demand. If you register, we’ll send you a link to view the recording. You can also explore the biosand filter in this free resources library hosted by the Centre for Affordable Water and Sanitation Technology (CAWST) . In this collection, you’ll find instructional information on how to build, use and maintain a biosand filter, in... (More)