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Legend (Environment/MD_ChesapeakeBayDeadZones)

Chesapeake Bay Dead Zones (0)
<0.2 mg/l anoxic conditions <0.2 mg/l anoxic conditions
0.2-2.0 mg/l hypoxic conditions 0.2-2.0 mg/l hypoxic conditions
2-3 mg/l borderline lethal 2-3 mg/l borderline lethal
3-5 mg/l stressful to some organisms 3-5 mg/l stressful to some organisms
>5 mg/l acceptable >5 mg/l acceptable