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
OCT-DEC 2024	1,330 ug/l		580 ug/l		1	2
JUL-SEP 2024	1,075 ug/l		456 ug/l		2	2
APR-JUN 2024	1,298 ug/l		700 ug/l		2	2
JAN-MAR 2024	1,422 ug/l		418 ug/l		2	4
OCT-DEC 2023	1,343 ug/l		554 ug/l		2	5
JUL-SEP 2023	1,161 ug/l		387 ug/l		2	4
APR-JUN 2023	1,024 ug/l		492 ug/l		2	4
JAN-MAR 2023	926 ug/l		333 ug/l		3	5
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): FDEP Watershed Monitoring Section, Manatee County Environmental Management Sampling Data, FDEP Southwest Regional Operations Center, FDEP Watershed Monitoring Section, Manatee County Environmental Management Sampling Data, 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
Five Year Seasonal Graph
Five Year Graph of All Samples

Source(s): Not Available

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.

Source: SWFWMD Hydrologic Data Section Data

River	Flows Whole River Range	Flows Data by Segment	Levels Whole River Range	Levels Data By Segment
Frog Creek	In the past 30 days Average river flow is slower than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are lower than they have been historically.	Levels Data Table and Graph

Source(s): Not Available

Source(s): Not Available