Presented By: USF Water Institute
Home Data & Mapping Water Quality Contour Mapping

Water Quality Contour Mapping

Compare Contour Maps

Our comparison tool helps visualize monthly and yearly changes in water quality.



Like any data provisioning system, the Water Quality Contour Mapping application has some restrictions to use. The below disclaimer should be read carefully before requesting contour maps. Also, the user should fully understand that the information provided should in no way be altered to misrepresent data content or the degree of accuracy provided by the data.

  • The data obtained from the Manatee County Water Atlas may be provisional and thus subject to revision. The sponsoring project partners, the USF Water Institute, and the University of South Florida specifically disclaim any warranty, either expressed or implied, including but not limited to the implied warranties of merchantability and fitness for a particular use. The entire risk as to quality and performance is with the user.
  • In no event will the sponsoring project partners, the USF Water Institute, the University of South Florida, or the data providers themselves be liable for any direct, indirect, incidental, special, consequential, or other damages, including loss of profit, arising out of the use of these data even if the funding agencies, sponsoring project partners, data providers, USF Water Institute, or the University of South Florida have been advised of the possibility of such damages. If you have any questions concerning these data, please use this data contact form.

If you have any specific ideas that could help us improve the water quality contour mapping system or if you have questions related to the limitations of the current system, please provide your suggestions using our comment form.

I have read and acknowledge the limitations of the current water quality contour mapping system.

Accept Decline

Change in Water Quality over Time

The slideshow below shows Chlorophyll a data starting with the most recent month of data and cycling through to the oldest contour map generated. Contour maps are generated routinely for the list of parameters shown below. Select from the list below to see the change over time.

Monthly Generated Water Quality Contour Maps

Each month new contour maps are automatically generated for the parameters listed below. You can also select a prior year to access archived maps.

The PDF documents below contain maps showing both the parameter distribution within the bays for the selected month, as well as the average monthly distribution for that parameter over the previous ten years (if available).

Filter By Year:

Contour Maps for All Available Parameters