2020
Yes
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7513401/
Hung, Dang The
Asia
Exposure Study
Modeling
Elementary (K-5)
Drinking water
Tap water
Water quality
Chemicals
Microbes
Hanoi
Vietnam
All of the schools employed community water system as a main source for drinking water. The results showed that all tested samples were found to be within the standards for some physicochemical properties, including Color, Taste and Odor, Hardness, Chloride, Total
Iron (Fe2+ và Fe3+), Total Manganese (Mn), Nitrate (NO3
–), Sulfate (SO4
2–), and Total Arsenic (As). On the other hand, some samples did not
meet the allowable limits of the national standard, due to pH (3.9%), Turbidity (0.6%), Nitrite (3.2%), Permanganate (6.5%), and Ammonium
(5.8%). Furthermore, the microbial data revealed that the substandard water samples from municipal water systems were contaminated by
Coliform (9.7%) and/or E.coli (7.8%).
Iron (Fe2+ và Fe3+), Total Manganese (Mn), Nitrate (NO3
–), Sulfate (SO4
2–), and Total Arsenic (As). On the other hand, some samples did not
meet the allowable limits of the national standard, due to pH (3.9%), Turbidity (0.6%), Nitrite (3.2%), Permanganate (6.5%), and Ammonium
(5.8%). Furthermore, the microbial data revealed that the substandard water samples from municipal water systems were contaminated by
Coliform (9.7%) and/or E.coli (7.8%).