Information+on+the+DO+meter

**Woah, bring out the DO meter**

 What is dissolved oxygen? Dissolved oxygen is the level of oxygen present in water. The danger of a body of water having too much oxygen is that the level of dissolved oxygen will decrease. Since some fishes are sensitive to certain levels of DO, they could find the situation of too much oxygen intolerable and die.  DO levels can change every season and during the day. The levels can also change with different water temperatures and altitudes. THe table below shows the different DO levels in relation to temperature. (°C) || DO (mg/l) || Temperature (°C) || DO (mg/l) || **Table 5.3
 * Temperature

 Maximum dissolved oxygen concentrates vary with temperature ** || || 14.60 || 23 || 8.56 ||^  || || 14.19 || 24 || <span style="color: rgb(103, 235, 92)">8.40 ||^  || || <span style="color: rgb(103, 235, 92)">13.81 || <span style="color: rgb(103, 235, 92)">25 || <span style="color: rgb(103, 235, 92)">8.24 ||^  || || <span style="color: rgb(103, 235, 92)">13.44 || <span style="color: rgb(103, 235, 92)">26 || <span style="color: rgb(103, 235, 92)">8.09 ||^  || || <span style="color: rgb(103, 235, 92)">13.09 || <span style="color: rgb(103, 235, 92)">27 || <span style="color: rgb(103, 235, 92)">7.95 ||^  || || <span style="color: rgb(103, 235, 92)">12.75 || <span style="color: rgb(103, 235, 92)">28 || <span style="color: rgb(103, 235, 92)">7.81 ||^  || || <span style="color: rgb(103, 235, 92)">12.43 || <span style="color: rgb(103, 235, 92)">29 || <span style="color: rgb(103, 235, 92)">7.67 ||^  || || <span style="color: rgb(103, 235, 92)">12.12 || <span style="color: rgb(103, 235, 92)">30 || <span style="color: rgb(103, 235, 92)">7.54 ||^  || || <span style="color: rgb(103, 235, 92)">11.83 || <span style="color: rgb(103, 235, 92)">31 || <span style="color: rgb(103, 235, 92)">7.41 ||^  || || <span style="color: rgb(103, 235, 92)">11.55 || <span style="color: rgb(103, 235, 92)">32 || <span style="color: rgb(103, 235, 92)">7.28 ||^  || || <span style="color: rgb(103, 235, 92)">11.27 || <span style="color: rgb(103, 235, 92)">33 || <span style="color: rgb(103, 235, 92)">7.16 ||^  || || <span style="color: rgb(103, 235, 92)">11.01 || <span style="color: rgb(103, 235, 92)">34 || <span style="color: rgb(103, 235, 92)">7.16 ||^  || || <span style="color: rgb(103, 235, 92)">10.76 || <span style="color: rgb(103, 235, 92)">35 || <span style="color: rgb(103, 235, 92)">6.93 ||^  || || <span style="color: rgb(103, 235, 92)">10.52 || <span style="color: rgb(103, 235, 92)">36 || <span style="color: rgb(103, 235, 92)">6.82 ||^  || || <span style="color: rgb(103, 235, 92)">10.29 || <span style="color: rgb(103, 235, 92)">37 || <span style="color: rgb(103, 235, 92)">6.71 ||^  || || <span style="color: rgb(103, 235, 92)">10.07 || <span style="color: rgb(103, 235, 92)">38 || <span style="color: rgb(103, 235, 92)">6.61 ||^  || || <span style="color: rgb(103, 235, 92)">9.85 || <span style="color: rgb(103, 235, 92)">39 || <span style="color: rgb(103, 235, 92)">6.51 ||^  || || <span style="color: rgb(103, 235, 92)">9.65 || <span style="color: rgb(103, 235, 92)">40 || <span style="color: rgb(103, 235, 92)">6.41 ||^  || || <span style="color: rgb(103, 235, 92)">9.45 || <span style="color: rgb(103, 235, 92)">41 || <span style="color: rgb(103, 235, 92)">6.41 ||^  || || <span style="color: rgb(103, 235, 92)">9.26 || <span style="color: rgb(103, 235, 92)">42 || <span style="color: rgb(103, 235, 92)">6.22 ||^  || || <span style="color: rgb(103, 235, 92)">9.07 || <span style="color: rgb(103, 235, 92)">43 || <span style="color: rgb(103, 235, 92)">6.13 ||^  || || <span style="color: rgb(103, 235, 92)">8.90 || <span style="color: rgb(103, 235, 92)">44 || <span style="color: rgb(103, 235, 92)">6.04 ||^  || || <span style="color: rgb(103, 235, 92)">8.72 || <span style="color: rgb(103, 235, 92)">45 || <span style="color: rgb(103, 235, 92)">5.95 ||^  || <span style="color: rgb(108, 228, 113)"> From looking at the table above, cold water can hold more oxygen than in warm water and similarly, water can hold less oxygen at higher altitudes than in lower altitudes. One environmental issue, thermal pollution/discharges, such as hot water released from a manufacturing plant or a power plant, raises the temperature of water and lowers its oxygen content. Therefore, thermal pollution is very hazardous to the well-being of fishes and other aquatic organisms in the body of water that is being affected. Aquatic animals are most vulnerable to lowered DO levels.
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