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 2023	900 ug/l		93 ug/l		1	1
OCT-DEC 2022	1,046 ug/l		159 ug/l		14	26
JUL-SEP 2022	1,044 ug/l		197 ug/l		14	28
APR-JUN 2022	904 ug/l		203 ug/l		14	22
JAN-MAR 2022	814 ug/l		153 ug/l		14	18
OCT-DEC 2021	977 ug/l		172 ug/l		18	36
JUL-SEP 2021	1,000 ug/l		150 ug/l		20	39
APR-JUN 2021	998 ug/l		198 ug/l		20	43
JAN-MAR 2021	920 ug/l		134 ug/l		19	28
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): Legacy Pinellas Water Quality Data, FDEP Historic Data from Legacy STORET, PINELLAS Water Quality Data, Biological Research Associates , FDEP Watershed Monitoring Section, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), USGS National Water Information System, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Pinellas County Department of Environmental Management, 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
OCT-DEC 2022	783 ug/l		93 ug/l		2	4
JUL-SEP 2022	913 ug/l		83 ug/l		2	4
APR-JUN 2022	1,275 ug/l		65 ug/l		2	2
JAN-MAR 2022	973 ug/l		83 ug/l		2	4
OCT-DEC 2021	780 ug/l		78 ug/l		2	4
JUL-SEP 2021	827 ug/l		92 ug/l		5	7
APR-JUN 2021	1,033 ug/l		91 ug/l		5	7
JAN-MAR 2021	861 ug/l		89 ug/l		5	7
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, Legacy Pinellas Water Quality Data, FDEP Historic Data from Legacy STORET, PINELLAS Water Quality Data, FDEP Watershed Monitoring Section, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, SWFWMD Water Quality Monitoring Program Data, USGS National Water Information System, Florida LAKEWATCH, Pinellas County Department of Environmental Management, FDEP - Southwest Regional Operations Center

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
Lake Tarpon Outfall Canal	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
Pinebrook Canal	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
Alligator 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
Longbranch 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

Source(s): Not Available

Source(s): Not Available