Water Quality Trends and Hotspots

This dual analysis allows you to explore short- and long-term trends for those water quality parameters that are most useful in evaluating the extent of nutrient pollution. The trend analysis (trend analysis symbol) shows whether the measured value of a water quality parameter is increasing or decreasing over time, and at what rate. The hotspot analysis (hotspot analysis symbol) compares the values measured at a sample site in the past year to values measured elsewhere in the county. Taken together, these two results can help you to gain a more complete perspective on water quality. For example, while the Water Quality Trends map might show that a particular measure of water quality is increasing at a certain monitoring location, the Water Quality Hotspots map may reveal that compared to the county as a whole, the values measured at that location are still very low.

This analysis will be performed annually, with results presented in summary form on the map, and detailed results downloadable as an Access database or CSV files. Each year new results will be viewable on this page as they become available.

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Trend Analysis

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Total Nitrogen

Note: Trends were prepared on March 26, 2024 using the latest available data.

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The nearby map shows the trend being experienced at the long-term monitoring stations spread throughout the Sarasota County area.

View Data Source Details

Map Legend

  • Increasing Trend, Larger Rate Improving
  • Increasing Trend, Smaller Rate Improving
  • No Trend
  • Decreasing Trend, Smaller Rate Declining
  • Decreasing Trend, Larger Rate Declining
  • Sarasota County Watershed Boundary

Map Legend

  • Increasing Trend, Larger Rate Declining
  • Increasing Trend, Smaller Rate Declining
  • No Trend
  • Decreasing Trend, Smaller Rate Improving
  • Decreasing Trend, Larger Rate Improving
  • Sarasota County Watershed Boundary

Map Legend

  • Increasing Trend, Larger Rate
  • Increasing Trend, Smaller Rate
  • No Trend
  • Decreasing Trend, Smaller Rate
  • Decreasing Trend, Larger Rate
  • Sarasota County Watershed Boundary

Download Trend Analysis Output

You can download raw data for your own analysis by clicking on the link below. The data is formatted as a ZIP file containing raw and calculated data, methods documentation, and an R script.

Download

Note: Trends were prepared on March 26, 2024 using the latest available data.

Hotspot Analysis

:
Total Nitrogen

Note: Trends were prepared on March 26, 2024 using the latest available data.

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The nearby map shows water quality hotspots at the long-term monitoring stations spread throughout the Sarasota County area.

View Data Source Details

Map Legend

  • > 90%
  • 75–90%
  • 50–75%
  • 25–50%
  • 10–25%
  • < 10%
  • Sarasota County Watershed Boundary

Map Legend

  • < 10%
  • 10–25%
  • 25–50%
  • 50–75%
  • 75–90%
  • > 90%
  • Sarasota County Watershed Boundary

Map Legend

  • > 90%
  • 75–90%
  • 50–75%
  • 25–50%
  • 10–25%
  • < 10%
  • Sarasota County Watershed Boundary

Download Hotspot Analysis Output

You can download raw data for your own analysis by clicking on the link below. The data is formatted as a ZIP file containing all supporting data.

Download

Note: Most recent hotspot analyses were performed on March 14, 2024 using the latest available data. Results presented replace all previous editions.

Contacts

For more information, please contact:

Agency Summary

Data collected by the following agencies were used in preparation of these reports.

Agency Period of Record Data Last Loaded Max Year
Sarasota County Coastal Creeks 2/24/1998 - 1/22/2024 7/14/2024 2024
Sarasota County Environmental Services Department Sampling Data 2/24/1998 - 5/1/2024 7/15/2024 2024