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
JAN-MAR 2022	723 ug/l		259 ug/l		18	48
OCT-DEC 2021	1,056 ug/l		317 ug/l		21	50
JUL-SEP 2021	1,113 ug/l		325 ug/l		22	51
APR-JUN 2021	744 ug/l		340 ug/l		21	26
JAN-MAR 2021	789 ug/l		242 ug/l		22	61
OCT-DEC 2020	1,057 ug/l		316 ug/l		21	27
JUL-SEP 2020	1,039 ug/l		260 ug/l		25	47
APR-JUN 2020	883 ug/l		275 ug/l		26	62
JAN-MAR 2020	692 ug/l		271 ug/l		20	54
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): FDEP Historic Data from Legacy STORET, Lower watershed program (LWP), 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), USGS National Water Information System, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Manatee County Environmental Management Sampling Data, Enviro-Audit, Southwest Florida Water Management District, FDEP - Southwest Regional Operations Center, FDEP - Watershed Assessment Section

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
JAN-MAR 2022	792 ug/l		180 ug/l		2	6
OCT-DEC 2021	983 ug/l		155 ug/l		5	9
JUL-SEP 2021	1,058 ug/l		226 ug/l		5	8
APR-JUN 2021	1,002 ug/l		176 ug/l		5	5
JAN-MAR 2021	800 ug/l		191 ug/l		2	6
OCT-DEC 2020	1,036 ug/l		234 ug/l		4	5
JUL-SEP 2020	1,030 ug/l		229 ug/l		5	7
APR-JUN 2020	811 ug/l		157 ug/l		5	9
JAN-MAR 2020	808 ug/l		207 ug/l		2	6
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): Lower watershed program (LWP), FDEP Watershed Monitoring Section, Manatee County Environmental Management Sampling Data, USGS National Water Information System, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Manatee County Environmental Management Sampling Data, FDEP - Watershed Assessment Section

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
Gamble 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 higher than they have been historically.	Levels Data Table and Graph
Upper Manatee River	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 higher than they have been historically.	Levels Data Table and Graph
Braden 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

Source(s): Not Available

Source(s): Not Available