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Manatee County Water Atlas


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Lower Manatee River

Lower Manatee River

Map

located within Manatee River Watershed

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Description

Explore general as well as scientific information about the movement, chemistry and biology of area surface water environments.

The data on this page are designed to give you a picture of the total health of this waterbody. Click the "Learn More" text to learn more about each parameter shown and how it indicates Water Quality.

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Water Quality Sampling Sites
Hydrology Sampling Sites
Other Sampling Sites
 

Water Quality Index

Water Quality Index (WQI) is an average of 5 different parameters giving a river a good (0-45), fair (45-60), or poor (60+) rating. Learn more about the Water Quality Index »

 
Water Quality Index

Whole River Range

47 - 66
Fair - Poor
Jul-Sep 2016

Data by River Segment



 
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Nutrient Chemistry

Although present in all surface waters, nutrients are among the leading causes of degradation of Florida water resources. Learn more about nutrient chemistry »

Nutrient Chemistry
Parameter Latest Value Historic Range Additional Information
Total Nitrogen (TN) 1,320.0 ug/l
9/6/2016
Source: FDEP Ambient Monitoring Sampling Data
91.0 - 7,760.0 ug/L
9/21/1976 - 9/6/2016
583 samples
Total Phosphorus (TP) 350.0 ug/L
9/6/2016
Source: FDEP Ambient Monitoring Sampling Data
56.0 - 1,720.0 ug/L
9/21/1976 - 9/6/2016
588 samples
Chlorophyll a,
uncorrected for
pheophytin help icon
4.5 ug/L
9/6/2016
Source: FDEP Ambient Monitoring Sampling Data
0.0 - 178.0 ug/L
1/27/1982 - 9/6/2016
492 samples
Chlorophyll a,
corrected for
pheophytin help icon
3.3 ug/L
9/6/2016
Source: FDEP Ambient Monitoring Sampling Data
0.0 - 115.0 ug/L
9/21/1983 - 9/6/2016
237 samples
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    Water Clarity

    Water clarity or turbidity measures the degree to which light is blocked because the water is cloudy or contains suspended particles, such as algae. Water clarity is one indicator of a waterbody's ability to sustain plants and wildlife. Learn more about water clarity »

     
    Water Clarity

    Whole River Range

    As of 11/16/1989,
    down Average turbidity is lower than it has been historically.

    Data by River Segment


     
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      Bacteria

      The currently used bacterial indicators for recreational waters include total coliform, fecal coliform and enterococcus. Indicator organisms themselves are not necessarily pathogenic but their presence "indicates" or suggests recent contamination by human sewage or other waste which may result in human illness. Sources of contamination include storm water runoff, sewage overflows and feces from wild and domestic animals. Learn more about bacteria »

      Bacteria
      Parameter Latest Value Historic Range Additional Information
      Fecal Coliform 260 CFU/100ml
      9/6/2016
      Source: FDEP Ambient Monitoring Sampling Data
      1 - 20,000 CFU/100ml
      8/26/1974 - 9/6/2016
      594 samples
      Total Coliform 120 CFU/100ml
      3/5/2002
      Source: Manatee County Environmental Management Sampling Data
      10 - 24,000 CFU/100ml
      9/27/1971 - 3/5/2002
      230 samples
      Enterococcus 142 CFU/100ml
      12/2/2015
      Source: Manatee County Environmental Management Sampling Data
      3 - 20,000 CFU/100ml
      1/5/2000 - 12/2/2015
      229 samples
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        Dissolved Oxygen

        Dissolved Oxygen (DO) is one of the most important indicators of water quality. It is essential for the survival of fish and other aquatic organisms. Learn more about dissolved oxygen »

        Additional Parameters
        Parameter Latest Value Historic Range Additional Information
        Dissolved Oxygen 7.3 mg/l
        9/6/2016
        Source: FDEP Ambient Monitoring Sampling Data
        0.7 - 13.4 mg/l
        3/2/1967 - 9/6/2016
        1,014 samples
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          Salinity

          Salinity
          Salinity measures the amount of salts dissolved in water. An estuary can exhibit a change in salinity throughout its length as fresh water entering from the tributaries mixes with seawater from the ocean. Learn more about salinity »
          Parameter Latest Value Historic Range Additional Information
          Salinity 0.0 ppt
          10/6/2010
          Source: FDEP Ambient Monitoring Sampling Data
          0.0 - 32.4 ppt
          12/12/1966 - 12/2/2015
          479 samples
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          Impaired Waters

          The Impaired Waters Data is the most recent available data from FDEP, but it may not reflect the current FDEP impaired list. These data are updated when and as soon as they are made available from FDEP.

          Impaired

          All natural water resources in this county are designated as Class III waters except for parts of the Manatee River and its tributaries upstream of the Rye Road Bridge and parts of the Braden River and its tributaries upstream of the Evers Reservoir dam which are Class I. The Gulf and Coastal Waters of Tampa Bay, including the coastal waters of Manatee County and the lower Manatee River which are all Class II. Class III waters are considered recreational use waters, which means that the water should be fishable and swimmable. Class II waters are predominately marine waters suitable for shellfish propagation and harvesting. Class I waters are freshwaters considered suitable for potable (drinkable) water supplies.

          Many water resources exist in Manatee County whose primary purposes are the treatment and conveyance of stormwater. These water resources include ditches, canals, and ponds that are designed and maintained for flood control or stormwater management. In addition, some water resources have been created for industrial wastewater treatment. These are identified in the "Industrial Waterbodies" theme on the Water Atlas map. State water classifications do not normally apply to the above water resources. None should be considered "fishable or swimmable." Learn more about impaired waters »

          Pollutants


          This waterbody has been associated with the following WBIDs deemed impaired by the Environmental Protection Agency's 303(d) list:

          WBID Basin Impairment(s) EPA Details
          1848B MANATEE RIVER BELOW DAM MERCURY IN FISH TISSUE View additional EPA information »

          Source(s): US Environmental Protection Agency

           
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          Advanced Data Features

          Files Graphs

          Data Download and Advanced Graphing Tool
          Download and/or graph water quality, hydrology, and rainfall trends using the data presented on the Atlas for use in your own analyses and reports.

           
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