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 2026	1,633 ug/l		883 ug/l		2	3
APR-JUN 2026	1,074 ug/l		298 ug/l		4	8
JAN-MAR 2026	1,129 ug/l		309 ug/l		4	11
OCT-DEC 2025	755 ug/l		297 ug/l		11	14
JUL-SEP 2025	1,218 ug/l		374 ug/l		11	19
APR-JUN 2025	1,223 ug/l		491 ug/l		7	9
JAN-MAR 2025	984 ug/l		160 ug/l		9	17
OCT-DEC 2024	895 ug/l		457 ug/l		9	9
JUL-SEP 2024	1,508 ug/l		477 ug/l		6	8
APR-JUN 2024	1,016 ug/l		358 ug/l		9	9
JAN-MAR 2024	1,403 ug/l		260 ug/l		12	19
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): FDEP South District Sampling Data, FDEP Watershed Monitoring Section, Manatee County Environmental Management Sampling Data, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), FDEP - South Regional Operations Center, FDEP Watershed Monitoring Section, Manatee County Environmental Management Sampling Data, Southwest Florida Water Management District, 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
Big Slough	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Deer Prairie Slough	In the past 30 days NO DATA Recent river flow data is unavailable.	No data table or graph available	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Myakka River	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Coker Creek	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Long Creek	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Maple Creek	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days NO DATA Recent water level data is unavailable.	No data table or graph available
Ogleby Creek	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days Average water levels are higher than they have been historically.	Levels Data Table and Graph
Taylor Creek	In the past 30 days Average river flow is faster than it has been historically.	Flows Data Table and Graph	In the past 30 days NO DATA Recent water level data is unavailable.	No data table or graph available

Source(s): Not Available

Source(s): Not Available