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 2025	1,103 ug/l	378.0 ug/l	38 ug/l		4	6
OCT-DEC 2024	1,402 ug/l	289.0 ug/l	49 ug/l		5	18
JUL-SEP 2024	1,542 ug/l	276.0 ug/l	60 ug/l		6	22
APR-JUN 2024	998 ug/l		63 ug/l		5	10
JAN-MAR 2024	948 ug/l		31 ug/l		6	23
OCT-DEC 2023	1,095 ug/l		32 ug/l		5	23
JUL-SEP 2023	1,299 ug/l		54 ug/l		5	20
APR-JUN 2023	1,309 ug/l		83 ug/l		6	15
JAN-MAR 2023	1,084 ug/l		53 ug/l		5	15
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, Polk County Parks & Natural Resources Division, FDEP Central Regional Operations Center, Florida Fish and Wildlife Conservation Commission Water Quality Data, FDEP Watershed Monitoring Section, SFWMD Water Quality Sampling Data, USGS National Water Information System, FDEP - Central Regional Operations Center, FDEP Watershed Monitoring Section, Polk County Natural Resources Division, South 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
JAN-MAR 2025	1,192 ug/l	62.2 ug/l	33 ug/l		6	6
OCT-DEC 2024	1,355 ug/l	49.8 ug/l	46 ug/l		8	10
JUL-SEP 2024	1,308 ug/l	17.6 ug/l	56 ug/l		6	6
APR-JUN 2024	1,036 ug/l		52 ug/l		8	8
JAN-MAR 2024	1,120 ug/l		32 ug/l		8	8
OCT-DEC 2023	933 ug/l		31 ug/l		10	15
JUL-SEP 2023	865 ug/l		29 ug/l		13	16
APR-JUN 2023	762 ug/l		29 ug/l		13	22
JAN-MAR 2023	830 ug/l		21 ug/l		12	18
Five Year Seasonal Graph	Graph	Graph	Graph	Graph
Five Year Graph of All Samples	Graph	Graph	Graph	Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, FDEP Historic Data from Legacy STORET, Polk County Parks & Natural Resources Division, FDEP Central Regional Operations Center, Florida Fish and Wildlife Conservation Commission Water Quality Data, FDEP Watershed Monitoring Section, Polk County Natural Resources Division, SFWMD Water Quality Sampling Data, SWFWMD Water Quality Sampling Data, FDEP Southwest Regional Operations Center, FDEP, Water Quality Standards and Special Projects (Florida), SWFWMD Water Quality Monitoring Program Data, USGS National Water Information System, FDEP - Central Regional Operations Center, FDEP Watershed Monitoring Section, Florida LAKEWATCH, Polk County Natural Resources Division, South Florida Water Management District, Southwest Florida Water Management District, FDEP - Southwest Regional Operations Center, 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
Reedy 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
Lake Marion Creek	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 lower than they have been historically.	Levels Data Table and Graph

Source(s): Not Available

Source(s): Not Available