SINGAPORE - In the past two months, two home-grown water filtration companies – Sterra and Purexygen – have come under fire for misleading advertisements over the health benefits of filtered water from their systems.

The incidents have prompted a review of the marketing practices of the water filtration industry, the Competition and Consumer Commission of Singapore said on March 21, after it flagged marketing material from Purexygen, which claimed its filtered water can prevent diabetes and other health problems.