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Catherine Francis
Senior advisor, marketing and communications, CAWST

Take the biosand filter survey

CAWST needs your input! In 2023, the biosand filter celebrates a very important milestone - 30 years. We invite all biosand filter implementers and/or trainers to participate in a survey to measure the tremendous impact the technology has had – on the WASH sector, and in people’s lives around the world. The survey includes questions about your experience with implementation, distribution, and impact, and how you have applied new knowledge, skills, and innovations. 
All results will be anonymized, so your answers won’t be attributed to you in our reports. The survey should take between 5 and 10 minutes to complete, and it's currently available in English, Spanish, French and Nepali. Please add a comment if you would prefer to take the survey in another language.
Take the survey now
Thanks for your participation!

NEW LIVE WEBINAR: A water professional’s guide to safe storage

Testing and treatment is only part of the equation to achieve safe drinking water at the point of use. How do you select a container for storing water once it’s been through sedimentation, filtration and disinfection? How do you keep it clean and prevent contamination?

To answer these questions and more, the HWTS Network is hosting a live webinar featuring experts from Eawag, the Swiss Federal Institute of Aquatic Science and Technology, and the Centre for Affordable Water and Sanitation Technology (CAWST). Join us to get helpful resources and job aids on safe storage, and stay for a Q&A.

A water professional’s guide to safe storage

Tuesday, July 12

9 - 10 a.m. MDT (5 - 6 p.m. CEST) | Check your time zone

Delivered in English


  • Regula Meierhofer (Eawag)
  • Marcio Botto (CAWST)

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 check out additional resources:

  • Download this free educational poster to help you teach others about biofilm: what it is, the threat it poses, and how you can prevent it. It’s available in English, French, Spanish and Arabic from the Centre for Affordable Water and Sanitation Technology (CAWST) resource library.

Are you planning or implementing a household water treatment project that’s keeping you up at night? Any questions that you’re not sure how to answer? For these and lots of other challenges, advisors are available to help.

Apply... (More)

Eva Manzano
Senior Manager, WASH Services, LAC, CAWST

Webinario en vivo: Calidad del agua en acción (en inglés) - 18 de mayo a las 9 am (hora de Colombia, Perú, Ecuador)

Presentado por Anna Murray, PhD, gerente senior de investigación en Aquaya Institute, organizado por la Red TANDAS

El evento se llevará a cabo en inglés. 
Los participantes revisarán ejemplos prácticos de las principales tomas de decisiones relacionadas con el análisis de la calidad del agua, que incluye:  
•    por qué analizar la calidad del agua
•    qué parámetros se deben analizar
•    cómo seleccionar un kit portátil
•    cuándo y con qué frecuencia hacer los análisis
•    cómo interpretar los resultados

RegĂ­strese ahora


Eva Manzano
Senior Manager, WASH Services, LAC, CAWST

NEW LIVE WEBINAR: Learn how to make your water quality testing program work in the real world

If you know a little (or even a lot!) about water quality testing, but aren’t sure how to establish a plan of what, where, when, and why to test – then this webinar is for you. Led by Anna Murray, PhD, Senior Research Manager at the Aquaya Institute, you’ll review practical examples of the main decision points for water quality testing, including:

  • why you might test water quality
  • what parameters to test
  • how to choose a test kit
  • when and how often to test
  • how to interpret the results

The session will have interactive elements, so bring your questions and experiences to share. 

Water quality testing in action: Making your testing program work in the real world 
Wednesday, May 18 

10 - 11 a.m. EST

Delivered in English

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 check out free online learning on drinking water quality testing, treatment, and lots more. Visit  to browse the library in multiple languages.