Survivable oxygen levels for bass range from 5 to 13 parts per million (ppm), though they highly prefer and will seek out waters with 9 to 12 ppm oxygen. If the oxygen level falls below 3 ppm, the fish will die of asphyxiation. And if they remain in areas with more than 13 ppm, they will experience oxygen poisoning.

And the corps graph shows mg/L ---- 1 ppm = 1mg/L

Eddie