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Poor water in many machines
The Nation October 24, 2012 1:00 am
Random checks of water-vending machines nationwide by the Department of Medical Sciences found that more than a third -38 per cent - had substandard water quality, DMS chief Dr Nipon Phopattanachai said on Monday.
Udon Thani, Trang and Surat Thani had the worst water quality, while Chon Buri, Nakhon Sawan, Nakhon Ratchasima and Chiang Mai had substandard quality at 40 to 50 per cent of machines.
Songkhla had the best water quality with only 12 per cent of water samples being substandard, while in Bangkok some 22 per cent of water samples were poor.
Nipon said the standard was determined by water quality, filters and microorganism contamination, as well as each machine's location. Some 26 per cent of substandard water was tainted by chemicals/metal or had acidic imbalance, which indicates an issue with water filters, while 16 per cent had microorganism contamination, mostly coliform bacteria.
Nipon has urged operators to check the quality of the water on a regular basis, keep their machines clean and change the water filters at least once or twice a year.