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water quality testing

How to test water quality? Low-cost, low-tech options for microbial testing

Pratibha Mistry's picture
A multi-compartment bag with a colorimetric reagent for E. coli testing
using a most probable number approach.

Photo credit: National Snow and Ice Data Center

Water quality is central to the challenge of ensuring safe water for all. Here we present the third entry in a three-part blog series on low-cost, low-tech water quality testing. In previous posts, we discussed options for measuring physical and chemical aspects of water quality. In this final post, we explore low-cost, low-tech options for microbial testing.

Water works: how a simple technology in Dhaka is changing the way people get clean water

Daphna Berman's picture

Amy Pickering laughs when she thinks of all the things that went wrong with the impact evaluation she recently completed of a water chlorination project in the slums of Bangladesh’s capital city Dhaka: delays, monsoons, and more delays.

“It was the hardest project I’ve ever done,” says the seasoned research engineer, now a professor at Tufts University, who was working on a project funded through the World Bank’s Strategic Impact Evaluation Fund.  

Clean water is an issue in Dhaka and other overcrowded cities in the region, where contamination by bacteria can lead to high rates of diarrhea, harming children’s growth and health. For Pickering, who specializes in water quality and diarrheal disease, the challenge was finding a water treatment technology that could work without electricity and operate in Dhaka’s extreme weather. 

Amy Pickering, a professor at Tufts University, working on a water chlorination project in the slums of Bangladesh’s capital city Dhaka

How to test water quality? Here are some low-cost, low-tech options

Jessica Anne Lawson's picture
Sustainable Development Goal 6 (SDG6) calls for “universal and equitable access to safe and affordable drinking water” by 2030, which is quite different from access to an “improved” water source, which has been our primary focus with the Millennium Development Goals. This makes water quality monitoring essential: how can we assess progress towards #SDG6 without knowing whether water is safe to drink?