asked 231k views
12 votes
7) What percentage of ppm of dissolved oxygen indicates good water quality?

a) 6.7
b) 8
c) 4.5
d) Below 4.5

asked
User Stidmatt
by
8.0k points

1 Answer

9 votes

Answer:

The answer is c. 4.5

answered
User Hiron
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