Testing Water Quality

By Mikayla Richardson, Group 20

On, Monday July 2 we learned how to use macroinvertebrate’s in Nature/S.T.E.M. to determine water’s quality. 

The first step   is to find out the   animal based on   its features. The   second step is to   figure out the   water quality. On   Tuesday, we went   into the stream   and found animals   to see what type of water is in the stream. We split into two groups. Group 1 found a stonefly nymph, a caddisfly larva, a water penny, riffle beetle, and a mayfly nymph which are all sensitive to pollution. 

In Group 2 we also found a crayfish, a scud, a whirligig beetle and a water strider which are somewhat sensitive to pollution. Then we calculate water quality, by adding the number of animals found in each group and multiplying it by 3 for Group 1 and 2 for Group 2 and add the values together to find out the water quality. Since the number was greater than or equal to 22, the water quality was excellent!

It was a fun activity especially since we went to the stream and it was hot out.