Question

In the Water Quality Index created by the National Sanitation Foundation, how many different factors are taken into account when determining the water quality?

A) 9
B) 10
C) 12
D) 0

Answer 1

The Water Quality Index (WQI) developed by the National Sanitation Foundation (NSF) takes into account 9 different factors when determining water quality. Correct option is A.

Step-by-step explanation:

The Water Quality Index (WQI) developed by the National Sanitation Foundation (NSF) takes into account 9 different factors when determining water quality. These factors include temperature, pH, dissolved oxygen, turbidity, total suspended solids, biochemical oxygen demand, nitrate, phosphate, and fecal coliform. Each factor is assigned a weighted value based on its importance, and the overall index is calculated by combining the weighted values of all the factors.