
TCC Vice Chairman Pornsilp Patcharintanakul said that the association's members, which use tap water in the manufacturing process, are now highly worried over investor confidence.
"The government should produce an announcement to assure the water quality. Verbal assurance through news media is not enough to maintain foreign investor confidence and win confidence from importers," he said.
On Nov 11, the association will officially submit Prime Minister Yingluck Shinawatra a request for such written assurance.
Yingluck has assured all of the water safety. It was also announced on Nov 8 that Bangkok's tap water quality meets the World Health Organisation standard.