Polk 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
JUL-SEP 2019 1,213 ug/l No Data Available 1,728 ug/l No Data Available 4 4
APR-JUN 2019 1,588 ug/l No Data Available 1,125 ug/l 0.54 mg/l 5 5
JAN-MAR 2019 1,596 ug/l No Data Available 1,078 ug/l 0.8 mg/l 9 13
OCT-DEC 2018 2,109 ug/l No Data Available 1,101 ug/l 0.83 mg/l 8 12
JUL-SEP 2018 1,359 ug/l No Data Available 1,239 ug/l 1.04 mg/l 9 13
APR-JUN 2018 1,471 ug/l No Data Available 1,084 ug/l 0.9 mg/l 9 13
JAN-MAR 2018 1,788 ug/l No Data Available 1,067 ug/l 0.81 mg/l 9 13
Five Year Seasonal Graph No Data Available
Five Year Graph of All Samples No Data Available

Source(s): Quarterly Routine Water Monitoring, EPC Monthly Routine Water Monitoring, Hillsborough County Lake Assessments, EPC Water Quality Data, 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, FDEP Southwest Regional Operations Center, Stream Waterwatch Water Quality Data, Volunteer , USGS National Water Information System, 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
OCT-DEC 2019 1,665 ug/l No Data Available 461 ug/l No Data Available 2 2
JUL-SEP 2019 1,510 ug/l No Data Available 458 ug/l No Data Available 2 2
APR-JUN 2019 1,411 ug/l No Data Available 317 ug/l 0 mg/l 3 3
JAN-MAR 2019 1,405 ug/l No Data Available 396 ug/l 0 mg/l 3 3
OCT-DEC 2018 1,430 ug/l No Data Available 188 ug/l 0.1 mg/l 4 5
JUL-SEP 2018 1,424 ug/l No Data Available 238 ug/l 0.32 mg/l 3 5
APR-JUN 2018 1,780 ug/l No Data Available 569 ug/l 0.37 mg/l 2 2
JAN-MAR 2018 1,655 ug/l No Data Available 444 ug/l 0.26 mg/l 2 2
Five Year Seasonal Graph No Data Available
Five Year Graph of All Samples No Data Available

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, Polk County Parks & Natural Resources Division, 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, FDEP - Southwest Regional Operations Center

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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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