Question 11. Summarize your findings from the Water Quality Lab. Be sure to include your observations and the sources of each water-quality issue you investigated.

Answer :

meerkat18
Base on the data and the finding I conclude that Nitrates can lower oxygen level in the water and because of it, the fish were killed and also the small fish could be poisoned. I hope you are satisfied with my answer and feel free to ask for more clarification. Have a nice day

Nitrates can lower oxygen level in the water because of that the fish were killed and small fish could be poisoned.