Lake County Water Atlas


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St. Johns River Watershed

St. Johns 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
APR-JUN 2021 1,168 ug/l No Data Available 73 ug/l No Data Available 12 12
JAN-MAR 2021 1,249 ug/l No Data Available 69 ug/l No Data Available 19 26
OCT-DEC 2020 1,223 ug/l No Data Available 73 ug/l 0.04 mg/l 21 34
JUL-SEP 2020 1,568 ug/l No Data Available 114 ug/l No Data Available 18 27
APR-JUN 2020 969 ug/l No Data Available 83 ug/l 0.04 mg/l 14 25
JAN-MAR 2020 1,229 ug/l No Data Available 76 ug/l No Data Available 11 25
OCT-DEC 2019 1,311 ug/l No Data Available 89 ug/l 0.02 mg/l 21 39
JUL-SEP 2019 1,321 ug/l No Data Available 96 ug/l No Data Available 19 35
APR-JUN 2019 965 ug/l No Data Available 85 ug/l 0.03 mg/l 23 42
JAN-MAR 2019 951 ug/l No Data Available 63 ug/l No Data Available 19 36
Five Year Seasonal Graph No Data Available
Five Year Graph of All Samples No Data Available

Source(s): Lake County Surface Water Quality, FDEP Historic Data from Legacy STORET, FFWCC Legacy Storet Data, Seminole County Legacy Storet Data, Volusia County Water Quality Data, SJRWMD Water Quality Data, FDEP Central Regional Operations Center, Florida Fish and Wildlife Conservation Commission Water Quality Data, FDEP Watershed Monitoring Section, Volusia County Sampling Data, FDEP, Water Quality Standards and Special Projects (Florida), USGS National Water Information System, Watershed Action Volunteer Water Quality Data, FDEP - Central Regional Operations Center, FDEP Watershed Monitoring Section, St. Johns River Water Management District, Volusia County Sampling Data

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 2019 259 ug/l No Data Available 5 ug/l No Data Available 2 2
Five Year Seasonal Graph No Data Available No Data Available
Five Year Graph of All Samples No Data Available No Data Available

Source(s): Lake County Surface Water Quality, LAKEWATCH Supplemental Water Quality Sampling, LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, SJRWMD Water Quality Data, FDEP Central Regional Operations Center, FDEP Watershed Monitoring Section, FDEP, Water Quality Standards and Special Projects (Florida), Watershed Action Volunteer Water Quality Data, FDEP - Central Regional Operations Center, FDEP Watershed Monitoring 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 St. Johns River Watershed. Learn More about Stream Flow »

    River Flows Whole River Range Flows Data by Segment Levels Whole River Range Levels Data By Segment
    Saint Johns River In the past 30 days
    up Average river flow is faster than it has been historically.
    In the past 30 days
    down Average water levels are lower than they have been historically.
    Wekiva River In the past 30 days
    up Average river flow is faster than it has been historically.
    In the past 30 days
    up Average water levels are higher than they have been historically.
    Blackwater Creek 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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