Hillsborough County Water Atlas


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Alafia River Watershed

Alafia River 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
JAN-MAR 2024 1,364 ug/l 457.8 ug/l 683 ug/l 0.5 mg/l 42 68
OCT-DEC 2023 1,365 ug/l 517.5 ug/l 751 ug/l 0.63 mg/l 46 84
JUL-SEP 2023 1,268 ug/l 294.1 ug/l 1,005 ug/l 0.98 mg/l 30 75
APR-JUN 2023 1,274 ug/l 288.9 ug/l 881 ug/l 0.78 mg/l 43 104
JAN-MAR 2023 1,405 ug/l 495.0 ug/l 693 ug/l 0.63 mg/l 52 114
OCT-DEC 2022 1,441 ug/l 409.2 ug/l 935 ug/l 0.76 mg/l 54 119
JUL-SEP 2022 1,371 ug/l No Data Available 964 ug/l 0.69 mg/l 47 86
APR-JUN 2022 1,152 ug/l 383.7 ug/l 888 ug/l 0.73 mg/l 50 111
JAN-MAR 2022 1,251 ug/l 530.8 ug/l 629 ug/l 0.58 mg/l 53 118
Five Year Seasonal Graph
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, LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, Polk County Parks & Natural Resources Division, FDEP Watershed Monitoring Section, IMC Agrico (Florida), SWFWMD Water Quality Sampling Data, Tampa Bay Water, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), Stream Waterwatch Water Quality Data, Volunteer , USGS National Water Information System, FDEP Watershed Monitoring Section, Environmental Protection Commission of Hillsborough County, Polk County Natural Resources Division, Southwest Florida Water Management District, Tampa Bay Water, 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
JAN-MAR 2024 1,629 ug/l No Data Available 267 ug/l No Data Available 3 3
OCT-DEC 2023 1,124 ug/l No Data Available 390 ug/l No Data Available 2 2
JUL-SEP 2023 1,360 ug/l No Data Available 551 ug/l No Data Available 2 2
APR-JUN 2023 1,170 ug/l No Data Available 540 ug/l No Data Available 2 2
JAN-MAR 2023 1,060 ug/l No Data Available 365 ug/l No Data Available 2 2
OCT-DEC 2022 1,190 ug/l No Data Available 683 ug/l No Data Available 2 2
JUL-SEP 2022 1,273 ug/l No Data Available 522 ug/l No Data Available 2 2
APR-JUN 2022 2,073 ug/l No Data Available 251 ug/l No Data Available 5 11
JAN-MAR 2022 2,160 ug/l No Data Available 266 ug/l No Data Available 5 5
Five Year Seasonal Graph No Data Available
Five Year Graph of All Samples No Data Available

Source(s): Hillsborough County Lake Assessments, EPC Water Quality data gathered from reports, Hillsborough County Environmental Management Division, LAKEWATCH Supplemental Water Quality Sampling, LAKEWATCH Volunteer Water Quality Monitoring, Polk County Parks & Natural Resources Division, Florida Fish and Wildlife Conservation Commission Water Quality Data, FDEP Watershed Monitoring Section, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, SWFWMD Water Quality Monitoring Program Data, USGS National Water Information System, Hillsborough County Environmental Services Division, Florida LAKEWATCH, Polk County Natural Resources Division, FDEP - Southwest Regional Operations Center, FDEP - Watershed Assessment Section

  • Water Quality Sampling Locations - View a map showing the point locations of water quality monitoring stations which collect data being presented on the Water Atlas.
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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 Alafia River Watershed. Learn More about Stream Flow »

    River Flows Whole River Range Flows Data by Segment Levels Whole River Range Levels Data By Segment
    Alafia 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.
    Alafia River - North Prong 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.
    Alafia River - South Prong 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 Alafia River In the past 30 days
    NO DATA
    Recent river flow data is unavailable.
      No data table or graph available
    In the past 30 days
    down Average water levels are lower than they have been historically.
    Thirtymile Creek In the past 30 days
    NO DATA
    Recent river flow data is unavailable.
      No data table or graph available
    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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