Question
The WHO (World Health Organization) states that turbidity (suspended solids) should not be above 5 nephelometric turbidity units (NTU) and ideally should be below 1 NTU. Turbidity means clarity of water, low turbidity means the water is clean and free of ...
0
1 year 0 Answers 4880 views 1
Brilliantly Safe & Student-Centered Learning Platform 2021