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 2025	1,115 ug/l		45 ug/l		1	2
JAN-MAR 2025	1,412 ug/l		211 ug/l		17	17
OCT-DEC 2024	1,319 ug/l		173 ug/l		18	34
JUL-SEP 2024	1,349 ug/l		233 ug/l		18	36
APR-JUN 2024	1,119 ug/l		256 ug/l		17	38
JAN-MAR 2024	1,128 ug/l		175 ug/l		15	22
OCT-DEC 2023	1,223 ug/l		176 ug/l		15	31
JUL-SEP 2023	1,296 ug/l		213 ug/l		20	39
APR-JUN 2023	969 ug/l		285 ug/l		17	37
JAN-MAR 2023	1,267 ug/l		211 ug/l		18	26
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), FDEP Watershed Monitoring Section, Pasco County Stormwater Management Division, 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
JUL-SEP 2025	965 ug/l		15 ug/l		1	1
APR-JUN 2025	967 ug/l		23 ug/l		2	3
JAN-MAR 2025	779 ug/l		23 ug/l		3	3
OCT-DEC 2024	521 ug/l		38 ug/l		6	13
JUL-SEP 2024	953 ug/l		31 ug/l		17	34
APR-JUN 2024	999 ug/l		42 ug/l		16	39
JAN-MAR 2024	1,026 ug/l		43 ug/l		15	34
OCT-DEC 2023	855 ug/l		32 ug/l		11	23
JUL-SEP 2023	848 ug/l		27 ug/l		13	24
APR-JUN 2023	823 ug/l		37 ug/l		14	20
JAN-MAR 2023	791 ug/l		29 ug/l		15	25
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): LAKEWATCH Supplemental Water Quality Sampling, 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, FDEP, Water Quality Standards and Special Projects (Florida), SWFWMD Water Quality Monitoring Program Data, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Pinellas County Department of Environmental Management, Southwest Florida Water Management District, 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
Anclote 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 lower than they have been historically.	Levels Data Table and Graph
South Branch Anclote 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 lower than they have been historically.	Levels Data Table and Graph
Rattlesnake Creek	In the past 30 days Average river flow is the same as 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
Curlew 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 NO DATA Recent water level data is unavailable.	No data table or graph available

Source(s): Not Available

Source(s): Not Available