Water treatment

Andy Passenger wrote:

Do you know about the water quality of water supply for new housing complex projects in HCMC?
Are there lots of pollutants, chemicals or particle in the water?
Is the water hardness high?

SAWACO* is responsible for supplying water in most parts of HCMC from their Thu Duc and Tan Hiep water treatment plants.
They source raw water chiefly from the Dong Nai River and the Saigon River (surface water). They also use ground water from various locations.

Of course they treat raw water very well in their treatment plants but the cause of concern is, both these rivers are highly polluted, especially the Dong Nai River which gets heavy deposits of industrial waste.
- Dong Nai basin pollution worries officials - (Vietnamnet)
Consequently, raw (untreated) ground water is highly polluted as well.

It seems, Binh Chanh gets its water supply from the Tan Hiep plant. If that's the case, here's a recent 2015 report on Tan Hiep water quality.

This report prepared in 2013 by a team of Japanese experts may also give you some ideas about what to expect in terms of water quality in the HCMC area.
(search with keywords like "water quality" etc.)
More such reports from various agencies could be found on Google.

Hope this info helps! 
*I've g-translated the SAWACO page. Check the "Water supply service (06/05/2011)" link.

senwl wrote:

This article could be of interest to you.
Water Treatment

That's a really very helpful.

Thank you.