Water Quality Notes: Dissolved Oxygen1 - Polk.WaterAtlas.org

Water Quality Notes: Dissolved Oxygen 9Table 5. Designated water-use groups and dissolved oxygen (DO) criteria for surface waters of the state of Florida. Source:Florida Department of Environmental Protection; http://www.dep.state.fl.us/water/wqssp/classes.htm#criteria andhttp://www.dep.state.fl.us/legal/Rules/shared/62-302/302-Table.doc.Surface WaterClassificationDesignated Use(s)State Criteria for DissolvedOxygenBiochemical OxygenDemandIIIPotable water supply. Rivers,lakes, etc. used as a drinkingwater supply.Shellfish propagation orharvesting. Coastal areaswhere shellfish harvestingoccurs.Shall not be less than 5 mg/L.Normal daily and seasonalfluctuations above this levelshall be maintained.Shall not average less than 5mg/L in a 24-hour period andshall never be less than 4 mg/L.Normal daily and seasonalfluctuations above this levelshall be maintained.Shall not be increased toexceed values which wouldcause dissolved oxygen to bedepressed below the limitestablished for each classand, in no case, shall it begreat enough to producednuisance conditions.III: FreshRecreation, propagation andmaintenance of a healthy,well-balanced population of fishand wildlife in predominantlyfresh waters. Most surfacewaters of the State are ClassIII, unless otherwise designated.Shall not be less than 5 mg/L.Normal daily and seasonalfluctuations above this levelshall be maintained.III: MarineRecreation, propagation andmaintenance of a healthy,well-balanced population of fishand wildlife in predominantlymarine waters.Shall not average less than 5mg/L in a 24-hour period andshall never be less than 4 mg/L.Normal daily and seasonalfluctuations above this levelshall be maintained.IVAgricultural water supplies.Primarily agricultural areaslocated around LakeOkeechobee.Shall not average less than 4mg/L in a 24-hour period andshall never be less than 3 mg/L.VNavigation, utility, and industrialuse. No Class IV waterscurrently in FL.Shall not be less than 0.3 mg/L,50% of the time on an annualbasis for flows greater than orequal to 250 cubic feet persecond and shall never be lessthan 0.1 mg/L. Normal dailyand seasonal fluctuationsabove this level shall bemaintained.