Nitrates

            Nitrate is a salt or nitric acid composed of one nitrogen and three oxygen atoms. In freshwater, it can cause potential dead of fishes if the levels are high. The causes of nitrates in rivers are agricultural surface runoffs and fertilizers.

Levels:
0.1ppm: typical of undistributed forest streams
0.1-1.0ppm: may increase aquatic plant growth
>1ppm :likely to cause algal blossom
<10ppm: suitable for human consumption
<90ppm: no direct effect on fish

THE HEALTHIEST RIVER BASED ON NITRATES RESULTS IS: CLEAR CREEK(CHAMBER CREEK)


Chicago River

2.59 +/- 0.98 (1.32-5.33) ppm


Clear Creek(Chamber Creek)

(Clear Creek)
Mean: 0.56
Standard: 0.42
Range:0-.30
(Chamber Creek)
Mean: 0.67
Standard: 0.43
Range: 0-2


Ohio River

Total Nitrate and Nitrite (safe level < 10/1)
Results: 1/0.1