The graph displays the vertical profile of dissolved oxygen levels from water collected from Smith Point at various depths. At the surface, at a depth of 0 meters, the mean average dissolved oxygen level was 10.4 mg/L, with a standard deviation of 0.7 mg/L. At the midwater depth of 10 meters, the mean average dissolved oxygen level was 10.3 mg/L, with a standard deviation of 0.8 mg/L. At the bottom depth of 20 meters, the mean average dissolved oxygen level was 0.5 mg/L with a standard deviation of 0.3 mg/L. The graph shows these means and their respective standard deviations as three separate points, connected by a curved trendline. The x-axis represents depth in meters to the one’s place, ranging from 0 to 25 meters, with tics and numbers to indicate every 5-meter increase. The y-axis shows dissolved oxygen in mg/L to the tenth’s place, ranging from 0.0 to 12.0 mg/L, with tics and numbers to indicate every 2.0-mg/L increase. The trendline shows a slight increase in dissolved oxygen levels from 0 to approximately 7.5 meters, at which point it begins to decrease. A more rapid decrease commences at 10 meters until the trendline ends at 20 meters.