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
APR-JUN 2024	1,080 ug/l		320 ug/l		1	1
JAN-MAR 2024	1,120 ug/l		266 ug/l		3	5
OCT-DEC 2023	1,143 ug/l		252 ug/l		3	6
JUL-SEP 2023	1,122 ug/l		270 ug/l		3	6
APR-JUN 2023	1,511 ug/l		717 ug/l		3	7
JAN-MAR 2023	1,565 ug/l		405 ug/l		3	4
OCT-DEC 2022	1,270 ug/l		276 ug/l		4	7
JUL-SEP 2022	1,286 ug/l		233 ug/l		4	8
APR-JUN 2022	998 ug/l		300 ug/l		3	3
JAN-MAR 2022	1,179 ug/l		461 ug/l		4	7
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): Legacy Pinellas Water Quality Data, PINELLAS Water Quality Data, FDEP Watershed Monitoring Section, FDEP Southwest Regional Operations Center, USGS National Water Information System, 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	1,550 ug/l		86 ug/l		3	6
APR-JUN 2022	1,690 ug/l		95 ug/l		3	3
Five Year Seasonal Graph	Graph		Graph
Five Year Graph of All Samples	Graph		Graph

Source(s): LAKEWATCH Volunteer Water Quality Monitoring, FDEP Watershed Monitoring Section, SWFWMD Water Quality Sampling Data, SWFWMD Water Quality Monitoring Program Data, Florida LAKEWATCH, Southwest Florida Water Management District

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
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 Average water levels are higher than they have been historically.	Levels Data Table and Graph

Source(s): Not Available

Source(s): Not Available