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Tampa Bay Water Atlas


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Middle Tampa Bay Watershed

Middle Tampa Bay Watershed

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Description

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

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Map Legend

Water Quality sampling site
Hydrology sampling site
Closest Rainfall site
Rainfall sampling site
Multi-type sampling site
Other sampling site
 

Water Quality

The following data are summarized as seasonal average values for lake and river sampling locations located within the watershed. While these data are useful to serve as a general picture of watershed health, these data must be viewed with caution because these samples have been taken from ecologically different water resources.

Rivers:
Samples from most rivers located in this watershed are averaged as part of these data summaries.
Season Total Nitrogen Nitrate (NO3) Total Phosphorus Orthophosphate Number of Sample Stations Number of Samples
OCT-DEC 2023 1,336 ug/l No Data Available 366 ug/l 0.25 mg/l 19 34
JUL-SEP 2023 1,104 ug/l No Data Available 364 ug/l 0.33 mg/l 16 34
APR-JUN 2023 1,218 ug/l No Data Available 424 ug/l 0.45 mg/l 27 54
JAN-MAR 2023 1,009 ug/l No Data Available 285 ug/l 0.27 mg/l 26 48
OCT-DEC 2022 1,199 ug/l No Data Available 263 ug/l 0.29 mg/l 31 61
JUL-SEP 2022 1,185 ug/l No Data Available 283 ug/l 0.36 mg/l 28 46
APR-JUN 2022 989 ug/l No Data Available 302 ug/l 0.29 mg/l 31 62
JAN-MAR 2022 778 ug/l No Data Available 251 ug/l 0.35 mg/l 25 51
Five Year Seasonal Graph No Data Available
Five Year Graph of All Samples

Source(s): Quarterly Routine Water Monitoring, EPC Monthly Routine Water Monitoring, Hillsborough County Lake Assessments, EPC Water Quality Data, EPC Water Quality data gathered from reports, Hillsborough County Environmental Management Division, LAKEWATCH Volunteer Water Quality Monitoring, Legacy Pinellas Water Quality Data, FDEP Historic Data from Legacy STORET, PINELLAS Water Quality Data, FDEP Watershed Monitoring Section, IMC Agrico (Florida), Florida LAKEWATCH, Manatee County Environmental Management Sampling Data, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), Stream Waterwatch Water Quality Data, Volunteer , USGS National Water Information System, City of St. Petersburg, FDEP Watershed Monitoring Section, Environmental Protection Commission of Hillsborough County, Florida LAKEWATCH, Manatee County Environmental Management Sampling Data, Southwest Florida Water Management District, FDEP - Southwest Regional Operations Center

Lakes:
Samples from most lakes located in this watershed are averaged as part of these data summaries.
Season Total Nitrogen Nitrate (NO3) Total Phosphorus Orthophosphate Number of Sample Stations Number of Samples
JUL-SEP 2023 549 ug/l No Data Available 58 ug/l No Data Available 3 7
APR-JUN 2023 564 ug/l No Data Available 107 ug/l No Data Available 3 5
JAN-MAR 2023 862 ug/l No Data Available 108 ug/l No Data Available 3 6
OCT-DEC 2022 1,049 ug/l No Data Available 66 ug/l No Data Available 10 18
JUL-SEP 2022 1,348 ug/l No Data Available 69 ug/l No Data Available 10 19
APR-JUN 2022 1,207 ug/l No Data Available 83 ug/l No Data Available 10 14
JAN-MAR 2022 1,295 ug/l No Data Available 91 ug/l No Data Available 5 11
Five Year Seasonal Graph No Data Available No Data Available
Five Year Graph of All Samples No Data Available No Data Available

Source(s): EPC Water Quality data gathered from reports, LAKEWATCH Supplemental Water Quality Sampling, LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, PINELLAS Water Quality Data, FDEP Watershed Monitoring Section, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), SWFWMD Water Quality Sampling Data (Ken Romie), SWFWMD Water Quality Monitoring Program Data, USGS National Water Information System, City of St. Petersburg, FDEP Watershed Monitoring Section, Florida LAKEWATCH, FDEP - Southwest Regional Operations Center, FDEP - Watershed Assessment Section

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    Groundwater Quantity: Aquifer Resource Indicator

    Southwest Florida Water Management District calculates the Aquifer Resource Indicator (ARI) for their three groundwater regions each month. The ARI was created to provide the public with a gauge of groundwater levels in their area, so they can develop an understanding of the severity and cycles of drought and recovery. The three regions include: North (Citrus, Hernando, Lake, Levy, Marion, and Sumter counties), Central (Hillsborough, Pasco, Pinellas, and Polk counties), and South (Charlotte, DeSoto, Hardee, Highlands, Manatee, and Sarasota counties). Learn More about the Aquifer Resource Indicator >>

    To determine the ARI for a region, each well is compared weekly to its respective low-normal value and the difference is calculated. The weekly differences are reduced to a monthly value for all monitoring wells within a region, and the resulting ARI value represents how far water levels in the aquifer must rise or fall to reach their respective low-normal values.

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    Source: SWFWMD Hydrologic Data Section Data


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      Stream Flow and Levels

      Stream level and flow data for the Middle Tampa Bay Watershed. Learn More about Stream Flow »

      River Flows Whole River Range Flows Data by Segment Levels Whole River Range Levels Data By Segment
      Little Manatee River In the past 30 days
      down Average river flow is slower than it has been historically.
      In the past 30 days
      up Average water levels are higher than they have been historically.
      Little Manatee River - South Fork In the past 30 days
      down Average river flow is slower than it has been historically.
      In the past 30 days
      up Average water levels are higher than they have been historically.

      Source(s): Not Available

      Source(s): Not Available
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